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Edwards KC, Vasiliu M, Maxwell JW, Castillo CE, Marion DM, Craciun R, Hall JF, Tapu D, Dixon DA. NHC Carbene-Metal Complex Ligand Binding Energies. J Phys Chem A 2023; 127:10838-10850. [PMID: 38109706 DOI: 10.1021/acs.jpca.3c06409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
The ligand binding energies (LBEs) of N-heterocyclic carbenes (NHCs) and CH2 and CF2 adducts with group 1, 2, 10, and 11 metals and complexes with metals from these groups are predicted at the coupled cluster CCSD(T) level of theory by using density functional theory optimized geometries. The differences in LBEs as a function of the metal and the types of bonding interactions as well as the type of carbene are described. The bonding between the alkali cations and alkaline earth dications is predominantly ionic with a linear correlation between the LBEs and the cation hardness. In contrast, the bonding behaviors of the group 10 and 11 metals and metal complexes have only a weak, indirect correlation between the LBEs and the metal hardness. The difference in bonding behavior between the groups of metals arises due to the accessibility of electron donation between the ligand and the metal in the transition metal complexes, which results in more covalent-like bonding behavior. The presence of the methyl groups on the NHC nitrogen results in only slightly more delocalized charge from the metal onto the ring, but there is significant redistribution of the charge on the ring. Saturation of the NHC ring had a much smaller effect on how the charge was distributed on the ring. The analysis of the bonding behavior of NHCs with various metal groups enables improved understanding of carbene-metal interactions to inform rational design of NHC-based systems.
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Affiliation(s)
- Kyle C Edwards
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Jackson W Maxwell
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Clarisa E Castillo
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Daniel M Marion
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Raluca Craciun
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - James Fletcher Hall
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Daniela Tapu
- Department of Chemistry and Biochemistry, Kennesaw State University, Kennesaw, Georgia 30144, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
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Neyra JA, Vasiliu M. Changing Paradigms in Acute Kidney Injury: From Mechanisms to Management. Nephron Clin Pract 2023; 147:711-712. [PMID: 37812912 PMCID: PMC10872479 DOI: 10.1159/000534496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2023] [Accepted: 10/03/2023] [Indexed: 10/11/2023] Open
Affiliation(s)
- Javier A Neyra
- Division of Nephrology, Department of Medicine, Heersink School of Medicine, the University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Monica Vasiliu
- Division of Nephrology, Department of Medicine, Heersink School of Medicine, the University of Alabama at Birmingham, Birmingham, Alabama, USA,
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Möbs M, Dixon DA, de Melo GF, Vasiliu M, Graubner T, Christe KO, Kraus F. The Crucial Role of Sb 2 F 10 in the Chemical Synthesis of F 2. Angew Chem Int Ed Engl 2023; 62:e202307218. [PMID: 37438320 DOI: 10.1002/anie.202307218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/08/2023] [Accepted: 07/11/2023] [Indexed: 07/14/2023]
Abstract
The purely chemical synthesis of fluorine is a spectacular reaction which for more than a century had been believed to be impossible. In 1986, it was finally experimentally achieved, but since then this important reaction has not been further studied and its detailed mechanism had been a mystery. The known thermal stability of MnF4 casts serious doubts on the originally proposed hypothesis that MnF4 is thermodynamically unstable and decomposes spontaneously to a lower manganese fluoride and F2 . This apparent discrepancy has now been resolved experimentally and by electronic structure calculations. It is shown that the reductive elimination of F2 requires a large excess of SbF5 and occurs in the last reaction step when in the intermediate [SbF6 ][MnF2 ][Sb2 F11 ] the addition of one more SbF5 molecule to the [SbF6 ]- anion generates a second tridentate [Sb2 F11 ]- anion. The two tridentate [Sb2 F11 ]- anions then provide six fluorine bridges to the Mn atom thereby facilitating the reductive elimination of the two fluorine ligands as F2 .
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Affiliation(s)
- Martin Möbs
- Universität Marburg, Hans-Meerwein-Str. 4, 35032, Marburg, Germany
| | - David A Dixon
- Department of Chemistry & Biochemistry, The University of Alabama, Tuscaloosa, AL 35487-0336, USA
| | - Gabriel F de Melo
- Department of Chemistry & Biochemistry, The University of Alabama, Tuscaloosa, AL 35487-0336, USA
| | - Monica Vasiliu
- Department of Chemistry & Biochemistry, The University of Alabama, Tuscaloosa, AL 35487-0336, USA
| | - Tim Graubner
- Universität Marburg, Hans-Meerwein-Str. 4, 35032, Marburg, Germany
| | - Karl O Christe
- Loker Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA 90089, USA
| | - Florian Kraus
- Universität Marburg, Hans-Meerwein-Str. 4, 35032, Marburg, Germany
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Lontchi EM, Vasiliu M, Dixon DA. Hydrolysis Reactions of the High Oxidation State Dimers Th 2O 4, Pa 2O 5, U 2O 6, and Np 2O 6. A Computational Study. J Phys Chem A 2023; 127:6732-6748. [PMID: 37549315 DOI: 10.1021/acs.jpca.3c03455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Abstract
The energetics of the hydrolysis reactions for high oxidation states of the dimeric actinide species Th2IVO4, Pa2VO5, and U2VIO6 were calculated at the CCSD(T) level and those for triplet Np2VIO6 at the B3LYP level. Hydrolysis is initiated by the formation of a Lewis acid/base adduct with H2O (physisorbed product), followed by a proton transfer to form a dihydroxide molecule (chemisorbed product); this process was repeated until the initial actinide oxide is fully hydrolyzed. For Th2O4, hydrolysis (chemisorption) by the initial and subsequent H2O molecules prefers proton transfer to terminal oxo groups before the bridge oxo groups. The overall Th2O4 hydration pathway is exothermic with chemisorbed products preferred over the physisorption products, and the fully hydrolyzed Th2(OH)8 can form exothermically. Hydrolysis of Pa2O5 forms isomers of similar energies with no initial preference for bridge or terminal hydroxy groups. The most exothermic hydrolysis product for Pa is Pa2O(OH)8 and the most stable species is Pa2O(OH)8(H2O). Hydrolysis of U2O6 and Np2O6 with strong [O═An═O]2+ actinyl groups occurs first at the bridging oxygens rather than at the terminal oxo groups. The U2O6 and Np2O6 pathways predict hydrated products to be more favored than hydrolyzed products, as more H2O molecules are added. The stability of the U and Np clusters is predicted to decrease with increasing number of hydroxyl groups. The most stable species on the hydration reaction coordinate for U and Np is An2O3(OH)6(H2O).
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Affiliation(s)
- Eddy M Lontchi
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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Hu Y, Fang Z, Vasiliu M, Dixon DA. Computational Study of Dehydration and Dehydrogenation of Ethanol on (TiO 2) n ( n = 2-4) Nanoclusters. J Phys Chem A 2023; 127:3614-3624. [PMID: 37043178 DOI: 10.1021/acs.jpca.3c00776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2023]
Abstract
Dehydration and dehydrogenation of an ethanol molecule on (TiO2)n, n = 2-4, nanoclusters were studied at the correlated molecular orbital theory CCSD(T)/aug-cc-pVDZ(-PP(Ti)) level using density functional theory B3LYP/DZVP2-optimized geometries. Physisorption and chemisorption of ethanol at the bridge Ti site on the trimer and tetramer are thermodynamically preferred over these reactions at the Ti site with a terminal Ti═O. Two possible lowest energy reaction coordinates of dehydration were predicted for the dimer and trimer where the β hydrogen on ethanol transfers to the adjacent terminal oxygen, or to the adjacent bidentate oxygen. Only the latter reaction coordinate was predicted to be the lowest energy one for the tetramer. Removal of ethylene from the (TiO2)nOH2-C2H4 complex for n = 2-4 at 0 K requires 2-7 kcal/mol. For dehydrogenation, transfer of the α hydrogen to the adjacent Ti atom results in the lowest energy reaction coordinate following a proton-coupled electron-transfer (PCET) process. Removal of the acetaldehyde molecule requires 14-26 kcal/mol from the (TiO2)nH2-C2H4O complex. Loss of H2 from the (TiO2)nH2 complex requires 5-8 kcal/mol. Dehydration and dehydrogenation of one ethanol molecule occur below the reactant asymptote for (TiO2)n, n = 2-4, whereas for (WO3)3 and (MoO3)3, two ethanol molecules are required for this process to be below the reactant asymptote. Dehydration of ethanol is thermodynamically preferred over dehydrogenation on (TiO2)n, n = 2-4. There is an approximate linear correlation of metal Lewis acidity with physisorption of ethanol. A quadratic correlation is predicted between the chemisorption barrier of ethanol and the corresponding proton affinity of oxygen to which the proton is being transferred. There are linear correlations between the basicity of the oxygen site and the acidity of the OH group versus the energy to remove C2H4 from that site. The results for the nanoclusters for n = 3 and 4 are consistent with the experimental results for the reactivity of ethanol on Ti5c4+ rutile TiO2 (110) surface sites.
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Affiliation(s)
- Yiqin Hu
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Zongtang Fang
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
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6
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Lontchi E, Mason MM, Vasiliu M, Dixon DA. Prediction of the structures and heats of formation of MO 2, MO 3, and M 2O 5 for M = V, Nb, Ta, Pa. Phys Chem Chem Phys 2023; 25:8355-8368. [PMID: 36912479 DOI: 10.1039/d3cp00380a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
Structures for the mono-, di-, and tri-bridge isomers of M2O5 as well as those for the MO2 and MO3 fragments for M = V, Nb, Ta, and Pa were optimized at the density functional theory (DFT) level. Single point CCSD(T) calculations extrapolated to the complete basis set (CBS) limit at the DFT geometries were used to predict the energetics. The lowest energy dimer isomer was the di-bridge for M = V and Nb and the tri-bridge for M = Ta and Pa. The di-bridge isomers were predicted to be composed of MO2+ and MO3- fragments, whereas the mono- and tri-bridge are two MO2+ fragments linked by an O2-. The heats of formation of M2O5 dimers, as well as MO2 and MO3 neutral and ionic species were predicted using the Feller-Peterson-Dixon (FPD) approach. The heats of formation of the MF5 species were calculated to provide additional benchmarks. Dimerization energies to form the M2O5 dimers are predicted to become more negative going down group 5 and range from -29 to -45 kcal mol-1. The ionization energies (IEs) for VO2 and TaO2 are essentially the same at 8.75 eV whereas the IEs for NbO2 and PaO2 are 8.10 and 6.25 eV, respectively. The predicted adiabatic electron affinities (AEAs) range from 3.75 eV to 4.45 eV for the MO3 species and vertical detachment energies from 4.21 to 4.59 eV for MO3-. The calculated MO bond dissociation energies increase from 143 kcal mol-1 for M = V to ∼170 kcal mol-1 for M = Nb and Ta to ∼200 kcal mol-1 for M = Pa. The M-O bond dissociation energies are all similar ranging from 97 to 107 kcal mol-1. Natural bond analysis provided insights into the types of chemical bonds in terms of their ionic character. Pa2O5 is predicted to behave like an actinyl species dominated by the interactions of approximately linear PaO2+ groups.
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Affiliation(s)
- Eddy Lontchi
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, AL 35487-0336, USA.
| | - Marcos M Mason
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, AL 35487-0336, USA.
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, AL 35487-0336, USA.
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, AL 35487-0336, USA.
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Vasiliu M. Proceedings of the 12th Annual UAB-UCSD O'Brien Center Symposium: Changing Paradigms in Acute Kidney Injury - From Mechanisms to Management. Nephron Clin Pract 2023; 147:1-2. [PMID: 36634635 DOI: 10.1159/000528733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 12/06/2022] [Indexed: 01/14/2023] Open
Affiliation(s)
- Monica Vasiliu
- Division of Nephrology, Department of Medicine, University Alabama at Birmingham, Birmingham, Alabama, USA
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de Melo GF, Vasiliu M, Liu G, Ciborowski S, Zhu Z, Blankenhorn M, Harris R, Martinez-Martinez C, Dipalo M, Peterson KA, Bowen KH, Dixon DA. Theoretical and Experimental Study of the Spectroscopy and Thermochemistry of UC +/0/. J Phys Chem A 2022; 126:9392-9407. [PMID: 36508745 DOI: 10.1021/acs.jpca.2c06978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A combination of high-level ab initio calculations and anion photoelectron detachment (PD) measurements is reported for the UC, UC-, and UC+ molecules. To better compare the theoretical values with the experimental photoelectron spectrum (PES), a value of 1.493 eV for the adiabatic electron affinity (AEA) of UC was calculated at the Feller-Peterson-Dixon (FPD) level. The lowest vertical detachment energy (VDE) is predicted to be 1.500 eV compared to the experimental value of 1.487 ± 0.035 eV. A shoulder to lower energy in the experimental PD spectrum with the 355 nm laser can be assigned to a combination of low-lying excited states of UC- and excited vibrational states. The VDEs calculated for the low-lying excited electronic states of UC at the SO-CASPT2 level are consistent with the observed additional electron binding energies at 1.990, 2.112, 2.316, and 3.760 eV. Potential energy curves for the Ω states and the associated spectroscopic properties are also reported. Compared to UN and UN+, the bond dissociation energy (BDE) of UC (411.3 kJ/mol) is predicted to be considerably lower. The natural bond orbitals (NBO) calculations show that the UC0/+/- molecules have a bond order of 2.5 with their ground-state configuration arising from changes in the oxidation state of the U atom in terms of the 7s orbital occupation: UC (5f27s1), UC- (5f27s2), and UC+ (5f27s0). The behavior of the UN and UC sequence of molecules and anions differs from the corresponding sequences for UO and UF.
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Affiliation(s)
- Gabriel F de Melo
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - Gaoxiang Liu
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Sandra Ciborowski
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Zhaoguo Zhu
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Moritz Blankenhorn
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Rachel Harris
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | | | - Maria Dipalo
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Kirk A Peterson
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Kit H Bowen
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
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de Melo GF, Vasiliu M, Liu G, Ciborowski S, Zhu Z, Blankenhorn M, Harris R, Martinez-Martinez C, Dipalo M, Peterson KA, Bowen KH, Dixon DA. Electronic Properties of UN and UN - from Photoelectron Spectroscopy and Correlated Molecular Orbital Theory. J Phys Chem A 2022; 126:7944-7953. [PMID: 36269194 DOI: 10.1021/acs.jpca.2c06012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The results of calculations of the properties of the anion UN- including electron detachment are described, which further expand our knowledge of this diatomic molecule. High-level electronic structure calculations were conducted for the UN and UN- diatomic molecules and compared to photoelectron spectroscopy measurements. The low-lying Ω states were obtained using multireference CASPT2 including spin-orbit effects up to ∼20,000 cm-1. At the Feller-Peterson-Dixon (FPD) level, the adiabatic electron affinity (AEA) of UN is estimated to be 1.402 eV and the vertical detachment energy (VDE) is 1.423 eV. The assignment of the UN excited states shows good agreement with the experimental results with a VDE of 1.424 eV. An Ω = 4 ground state was obtained for UN- which is mainly associated with the 3H ΛS state. Thermochemical calculations estimate a bond dissociation energy (BDE) for UN- (U- + N) of 665.9 kJ/mol, ∼15% larger than that of UN and UN+. The NBO analysis reveals U-N triple bonds for the UN, UN-, and UN+ species.
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Affiliation(s)
- Gabriel F de Melo
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - Gaoxiang Liu
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Sandra Ciborowski
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Zhaoguo Zhu
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Moritz Blankenhorn
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Rachel Harris
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | | | - Maria Dipalo
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Kirk A Peterson
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Kit H Bowen
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
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Jian T, Vasiliu M, Lee ZR, Zhang Z, Dixon DA, Gibson JK. Dinuclear Complexes of Uranyl, Neptunyl, and Plutonyl: Structures and Oxidation States Revealed by Experiment and Theory. J Phys Chem A 2022; 126:7695-7708. [PMID: 36251495 DOI: 10.1021/acs.jpca.2c06121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Dinuclear perchlorate complexes of uranium, neptunium, and plutonium were characterized by reactivity and DFT, with results revealing structures containing pentavalent, hexavalent, and heptavalent actinyls, and actinyl-actinyl interactions (AAIs). Electrospray ionization produced native complexes [(AnO2)2(ClO4)3]- for An:An = U:U, Np:Np, Pu:Pu, and Np:Pu, which are intuitively formulated as actinyl(V) perchlorates. However, DFT identified lower-energy structures [(AnO2)(AnO3)(ClO4)2(ClO3)]- comprising a perchlorate fragmented to ClO3, actinyl(VI) cation AnVIO22+, and neutral AnO3. For U:U and Np:Np, and Np in Np:Pu, the coordinated AnO3 is calculated as actinyl(VI) with an equatorial oxo, [Oyl═AnVI═Oyl][═Oeq], whereas for Pu:Pu, it is plutonyl(V) oxyl, [Oyl═PuV═Oyl][-Oeq•]. The implied lower stability of PuVI versus NpVI indicates weaker Pu═Oeq versus Np═Oeq bonding. Adsorption of O2 by the U:U complex suggests oxidation of UV to UVI, corroborating the assignment of perchlorate [(AnVO2)2(ClO4)3]-. DFT predicts the O2 adducts are [(AnVIO2)(O2)(AnVIO2)(ClO4)3]- with actinyls oxidized from +V to +VI by bridging peroxide, O22-. In accordance with reactivity, O2- addition is computed as substantially exothermic for U:U and least favorable for Pu:Pu. Collision-induced dissociation of native complexes eliminated ClO2 to yield [(AnO2)(O)2(AnO2)(ClO4)2]-, in which fragmented O atoms bridge as oxyl O-• and oxo O2- to yield uranyl(VI) and plutonyl(VI), or as oxos O2- to yield neptunyl(VII), [Oyl═NpVII═Oyl]3+.
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Affiliation(s)
- Tian Jian
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - Zachary R Lee
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35401, United States.,Department of Biology and Chemistry, Morehead State University, Morehead, Kentucky 40351, United States
| | - Zhicheng Zhang
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - John K Gibson
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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Autillo M, Wilson RE, Vasiliu M, de Melo GF, Dixon DA. Periodic Trends within Actinyl(VI) Nitrates and Their Structures, Vibrational Spectra, and Electronic Properties. Inorg Chem 2022; 61:15607-15618. [PMID: 36130052 DOI: 10.1021/acs.inorgchem.2c02434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A series of actinyl(VI) nitrate salts of the form MAnO2(NO3)3, where M = NH4+ K+, Rb+, Cs+, and Me4N+ and AnO22+ = U, Np, Pu, and AnO2(NO3)2(H2O)2·H2O, and the uranyl tetranitrates M2UO2(NO3)4 have been synthesized from aqueous solution and their structures determined using single-crystal X-ray diffraction. Together, these complexes represent an isostructural series of actinide complexes among the salts crystallized with the same charge-compensating cation and have been studied using vibrational spectroscopy including Raman and Fourier-transform infrared. Periodic trends in both the structural properties of these complexes and their vibrational spectra are presented and discussed, in particular the invariant nature of the O≡An≡O asymmetric stretching frequencies observed across the actinyl series. Electronic structure calculations were performed at a variety of levels of theory to aid in the interpretation of the vibrational data and to correlate trends in the data with the underlying electronic properties of these molecules.
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Affiliation(s)
- Matthieu Autillo
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Richard E Wilson
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Gabriel F de Melo
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
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12
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de Melo GF, Vasiliu M, Marshall M, Zhu Z, Tufekci BA, Ciborowski SM, Blankenhorn M, Harris RM, Bowen KH, Dixon DA. Experimental and Computational Description of the Interaction of H and H - with U. J Phys Chem A 2022; 126:4432-4443. [PMID: 35767645 DOI: 10.1021/acs.jpca.2c03115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The results of ab initio correlated molecular orbital theory electronic structure calculations for low-lying electronic states are presented for UH and UH- and compared to photoelectron spectroscopy measurements. The calculations were performed at the CCSD(T)/CBS and multireference CASPT2 including spin-orbit effects by the state interacting approach levels. The ground states of UH and UH- are predicted to be 4Ι9/2 and 5Λ6, respectively. The spectroscopic parameters Te, re, ωe, ωexe, and Be were obtained, and potential energy curves were calculated for the low energy Ω states of UH. The calculated adiabatic electron affinity is 0.468 eV in excellent agreement with an experimental value of 0.462 ± 0.013 eV. The lowest vertical detachment energy was predicted to be 0.506 eV for the ground state, and the adiabatic ionization energy (IE) is predicted to be 6.116 eV. The bond dissociation energy (BDE) and heat of formation values of UH were obtained using the IE calculated at the Feller-Peterson-Dixon level. For UH, UH-, and UH+, the BDEs were predicted to be 225.5, 197.9, and 235.5 kJ/mol, respectively. The BDE for UH is predicted to be ∼20% lower in energy than that for ThH. The analysis of the natural bond orbitals shows a significant U+H- ionic component in the bond of UH.
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Affiliation(s)
- Gabriel F de Melo
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - Mary Marshall
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Zhaoguo Zhu
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Burak A Tufekci
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Sandra M Ciborowski
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Moritz Blankenhorn
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Rachel M Harris
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Kit H Bowen
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35401, United States
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13
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Gole JL, Chalek CL, Mason MM, de Melo GF, Vasiliu M, Dixon DA. Observation of Selectively Populated Monohalide Excited States from the Reactions of Group 3 Metal (Sc, Y, and La) Monomers and Dimers with Halogen-Containing Molecules. J Phys Chem A 2022; 126:3403-3426. [PMID: 35613075 DOI: 10.1021/acs.jpca.2c01779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The chemiluminescent reactions of the group 3 metals Sc and Y with F2, Cl2, Br2, ClF, ICl (Sc), IBr (Y), and SF6 and La with F2, SF6, Cl2, and ClF have been studied at low pressures (6 × 10-6 to 4 × 10-4 Torr) using a beam-gas arrangement and extended to the 10-3 Torr multiple collision pressure range. Contrary to previous reports, the observed chemiluminescent spectra are primarily attributed to emission from the metal monohalides. Extensive pressure and temperature dependence studies and high-level correlated molecular orbital theory calculations of the bond dissociation energies support this conclusion and the attribution of the chemiluminescence. Evidence for the "selective" production of a monohalide excited electronic state is obtained for several of the Sc and Y reactions. All reactions producing the metal monofluorides are first order with respect to the oxidant, while reactions producing the monochlorides and monobromides are found to be "faster than first order" with respect to the oxidant. This difference is associated with the metal halide bond dissociation energies and the metal halide product internal density of states. Analysis of the temperature dependence for six representative reactions indicates that the "selective" excited-state formation of the metal monohalides proceeds via a direct mechanism with negligible activation energy. We compare and contrast the present results with previous experiments and interpretations which have assigned the selective emission from these systems to the group 3 dihalides produced in a two-step reaction sequence analogous to an electron jump process. The current results suggest a distinctly different interpretation of the observed processes in these systems. The observed selectivity observed in these studies is remarkable given the significant number of known and potential excited states in the scandium and yttrium halides as well as their different electronic configurations.
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Affiliation(s)
- James L Gole
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Carl L Chalek
- School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Marcos M Mason
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Gabriel F de Melo
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
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14
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Vasiliu M, Edwards KC, Tapu D, Castillo CE, Stein TH, Craciun R, Arduengo AJ, Dixon DA. Bond Dissociation Energies of Carbene-Carbene and Carbene-Main Group Adducts. J Phys Chem A 2022; 126:2658-2669. [PMID: 35442677 DOI: 10.1021/acs.jpca.2c00921] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A range of carbene structures and their adducts with one another and with a selection of small-molecule electrophiles and nucleophiles were examined at the composite correlated molecular orbital theory G3MP2 level to explore ground-state "carbenic" structures, their stabilities, and reactivities. Differences between carbene general classification as a singlet electrophilic carbene or singlet nucleophilic carbene and their given reactivity are discussed. A key quantity is the carbon-carbon bond dissociation energy for carbene dimers or the carbene-adduct dissociation energy for other species. The carbene dimer bond dissociation energies span a wide range from 10 to 170 kcal/mol. The hydrogenation energies and singlet-triplet splitting were found to correlate best with the carbene's self-dimerization energy, whereas other descriptors do not. The proton and fluoride affinities of the carbenes alone prove inadequate for classifying reactivity among classes of carbenes. The self-dimerization bond dissociation energy, hydrogenation energy, and singlet-triplet splitting of various carbenes, despite sometimes large differences in proton affinity and other indicators of reactivity, provide usable metrics to correlate substantial amounts of thermodynamic and kinetic (reactivity) information regarding these structures.
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Affiliation(s)
- Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Kyle C Edwards
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Daniela Tapu
- Department of Chemistry and Biochemistry, Kennesaw State University, Kennesaw, Georgia 30144, United States
| | - Clarisa E Castillo
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Trent H Stein
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Raluca Craciun
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Anthony J Arduengo
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
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15
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Vasiliu M, Marshall M, Zhu Z, Bowen KH, Dixon DA. Molecular Properties of Thorium Hydrides: Electron Affinities and Thermochemistry. J Phys Chem A 2022; 126:2388-2396. [PMID: 35411767 DOI: 10.1021/acs.jpca.2c01460] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
High-level electronic structure calculations of the ground and low-lying energy electronic states for ThHx and ThHx- for x = 2-5 are reported and compared to available anion photoelectron detachment experiments. The adiabatic electron affinities (EAs) are predicted to be 0.82, 0.88, 0.51, and 2.36 eV for x = 2 to 5, respectively, at the Feller-Peterson-Dixon (FPD) level. The vertical detachment energies (VDEs) are predicted to be 0.84, 0.88, 0.81, and 4.38 eV for x = 2-5, respectively. The corresponding experimental VDEs are 0.871 eV for x = 2, 0.88 eV for x = 3, and 4.09 eV for x = 5. As for ThH, there is a significant spin-orbit (SO) correction for the EA of ThH2, and this correction decreases substantially for x > 2. The observed ThH2- photoelectron spectrum has many transitions as predicted at the CASPT2-SO level. The FPD bond dissociation energies (BDEs) increase from 67 to 75 kcal/mol for x = 2 to x = 4 at the FPD level. The BDE for ThH5 is much lower as it is a complex of H2 with ThH3. The hydride affinities for x = 2 to 4 are all comparable and near 70 kcal/mol. A natural bond orbital analysis is consistent with a significant Th+-H- ionic contribution to the Th-H bonds. There is very little participation of the 5f orbitals in the bonding and the valence electrons on the Th are dominated by 7s and 6d for the neutrals and anions except for ThH2- where there is a significant contribution from the 7p.
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Affiliation(s)
- Monica Vasiliu
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - Mary Marshall
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Zhaoguo Zhu
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Kit H Bowen
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
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16
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Vasiliu M. Proceedings of the 11th Annual UAB-UCSD O'Brien Center Symposium: Changing Paradigms in Acute Kidney Injury - From Mechanisms to Management. Nephron Clin Pract 2022; 146:227-228. [PMID: 35350029 DOI: 10.1159/000523999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 03/04/2022] [Indexed: 11/19/2022] Open
Affiliation(s)
- Monica Vasiliu
- Division of Nephrology, Department of Medicine, University Alabama at Birmingham, Birmingham, Alabama, USA
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17
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Vasiliu M, Peterson KA, Marshall M, Zhu Z, Tufekci BA, Bowen KH, Dixon DA. Interaction of Th with H 0/-/+: Combined Experimental and Theoretical Thermodynamic Properties. J Phys Chem A 2022; 126:198-210. [PMID: 34989579 DOI: 10.1021/acs.jpca.1c07598] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
High-level electronic structure calculations of the low-lying energy electronic states for ThH, ThH-, and ThH+ are reported and compared to experimental measurements. The inclusion of spin-orbit coupling is critical to predict the ground-state ordering as inclusion of spin-orbit switches the coupled-cluster CCSD(T) ordering of the two lowest energy states for ThH and ThH+. At the multireference spin-orbit SO-CASPT2 level, the ground states of ThH, ThH-, and ThH+ are predicted to be the 2Δ3/2, 3Φ2, and 3Δ1 states, respectively. The adiabatic electron affinity is calculated to be 0.820 eV, and the vertical detachment energy is calculated to be 0.832 eV in comparison to an experimental value of 0.87 ± 0.02 eV. The observed ThH- photoelectron spectrum has many transitions, which approximately correlate with excitations of Th+ and/or Th. The adiabatic ionization energy of ThH including spin-orbit corrections is calculated to be 6.181 eV. The natural bond orbital results are consistent with a significant contribution of the Th+H- ionic configuration to the bonding in ThH. The bond dissociation energies for ThH, ThH-, and ThH+ using the Feller-Peterson-Dixon approach were calculated to be similar for all three molecules and lie between 259 and 280 kJ/mol.
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Affiliation(s)
- Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35401, Unites States
| | - Kirk A Peterson
- Department of Chemistry, Washington State University, Pullman, Washington 99164, Unites States
| | - Mary Marshall
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, Unites States
| | - Zhaoguo Zhu
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, Unites States
| | - Burak A Tufekci
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, Unites States
| | - Kit H Bowen
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, Unites States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35401, Unites States
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18
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Speelman AL, Tran BL, Erickson JD, Vasiliu M, Dixon DA, Bullock RM. Accelerating the insertion reactions of (NHC)Cu-H via remote ligand functionalization. Chem Sci 2021; 12:11495-11505. [PMID: 34567502 PMCID: PMC8409461 DOI: 10.1039/d1sc01911b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 07/23/2021] [Indexed: 12/27/2022] Open
Abstract
Most ligand designs for reactions catalyzed by (NHC)Cu-H (NHC = N-heterocyclic carbene ligand) have focused on introducing steric bulk near the Cu center. Here, we evaluate the effect of remote ligand modification in a series of [(NHC)CuH]2 in which the para substituent (R) on the N-aryl groups of the NHC is Me, Et, t Bu, OMe or Cl. Although the R group is distant (6 bonds away) from the reactive Cu center, the complexes have different spectroscopic signatures. Kinetics studies of the insertion of ketone, aldimine, alkyne, and unactivated α-olefin substrates reveal that Cu-H complexes with bulky or electron-rich R groups undergo faster substrate insertion. The predominant cause of this phenomenon is destabilization of the [(NHC)CuH]2 dimer relative to the (NHC)Cu-H monomer, resulting in faster formation of Cu-H monomer. These findings indicate that remote functionalization of NHCs is a compelling strategy for accelerating the rate of substrate insertion with Cu-H species.
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Affiliation(s)
- Amy L Speelman
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Ba L Tran
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Jeremy D Erickson
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, University of Alabama Tuscaloosa AL 35487 USA
| | - David A Dixon
- Department of Chemistry and Biochemistry, University of Alabama Tuscaloosa AL 35487 USA
| | - R Morris Bullock
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory Richland WA 99352 USA
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19
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Mason MM, Smith C, Vasiliu M, Carrick JD, Dixon DA. Prediction of An(III)/Ln(III) Separation by 1,2,4-Triazinylpyridine Derivatives. J Phys Chem A 2021; 125:6529-6542. [PMID: 34286991 DOI: 10.1021/acs.jpca.1c01854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The effect of frustrated Lewis donors on metal selectivity between actinides and lanthanides was studied using a series of novel organic ligands. Structures and thermodynamic energies were predicted in the gas phase, in water, and in butanol using 9-coordinate, explicitly solvated (H2O) Eu, Gd, Am, and Cm in the +III oxidation state as reactants in the formation of complexes with 2-(6-[1,2,4]-triazin-3-yl-pyridin-2-yl)-1H-indole (Core 1), 3-[6-(2H-pyrazol-3-yl)pyridin-2-yl]-1,2,4-triazine (Core 2), and several derivatives. These complexations were studied using density functional theory (DFT) incorporating scalar relativistic effects on the actinides and lanthanides using a small core pseudopotential and corresponding basis set. A self-consistent reaction field approach was used to model the effect of water and butanol as solvents. Coordination preferences and metal selectivity are predicted for each ligand. Several ligands are predicted to have a high degree of selectivity, particularly when a low ionization potential in the ligand permits charge transfer to Eu(III), reducing it to Eu(II) and creating a half-filled f7 shell. Reasonable separation is predicted between Cm(III) and Gd(III) with Core 1 ligands, possibly due to ligand donor frustration. This separation is largely absent from Core 2 ligands, which are predicted to lose their frustration due to proton transfer from the 2N to the 3N position of the pyrazole component of the ligands via tautomerization.
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Affiliation(s)
- Marcos M Mason
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Caris Smith
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Jesse D Carrick
- Department of Chemistry, Tennessee Technological University, 803 Stadium Drive, Cookeville, Tennessee 38505-0001, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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20
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Loring JS, Qafoku O, Thompson CJ, McNeill AS, Vasiliu M, Dixon DA, Miller QRS, McGrail BP, Rosso KM, Ilton ES, Schaef HT. Synergistic Coupling of CO 2 and H 2O during Expansion of Clays in Supercritical CO 2-CH 4 Fluid Mixtures. Environ Sci Technol 2021; 55:11192-11203. [PMID: 34342971 DOI: 10.1021/acs.est.1c00275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We used IR and XRD, with supporting theoretical calculations, to investigate the swelling behavior of Na+-, NH4+-, and Cs+-montmorillonites (SWy-2) in supercritical fluid mixtures of H2O, CO2, and CH4. Building on our prior work with Na-clay that demonstrated that H2O facilitated CO2 intercalation at relatively low RH, here we show that increasing CO2/CH4 ratios promote H2O intercalation and swelling of the Na-clay at progressively lower RH. In contrast to the Na-clay, CO2 intercalated and expanded the Cs-clay even in the absence of H2O, while increasing fluid CO2/CH4 ratios inhibited H2O intercalation. The NH4-clay displayed intermediate behavior. By comparing changes in the HOH bending vibration of H2O intercalated in the Cs-, NH4-, and Na-clays, we posit that CO2 facilitated expansion of the Na-clay by participating in outer-sphere solvation of Na+ and by disrupting the H-bond network of intercalated H2O. In no case did the pure CH4 fluid induce expansion. Our experimental data can benchmark modeling studies aimed at predicting clay expansion in humidified fluids with varying ratios of CO2 and CH4 in real reservoir systems with implications for enhanced hydrocarbon recovery and CO2 storage in subsurface environments.
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Affiliation(s)
- John S Loring
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Odeta Qafoku
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | | | - Ashley S McNeill
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Monica Vasiliu
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - David A Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Quin R S Miller
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - B Peter McGrail
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Kevin M Rosso
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Eugene S Ilton
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Herbert T Schaef
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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21
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Lontchi EM, Vasiliu M, Tatina LM, Caccamo AC, Gomez AN, Gibson JK, Dixon DA. Hydrolysis of Small Oxo/Hydroxo Molecules Containing High Oxidation State Actinides (Th, Pa, U, Np, Pu): A Computational Study. J Phys Chem A 2021; 125:6158-6170. [PMID: 34240864 DOI: 10.1021/acs.jpca.1c04048] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The energetics of hydrolysis reactions for high oxidation states of oxo/hydroxo monomeric actinide species (ThIVO2, PaIVO2, UIVO2, PaVO2(OH), UVO2(OH), UVIO3, NpVIO3, NpVIIO3(OH), and PuVIIO3(OH)) were calculated at the CCSD(T) level. The first step is the formation of a Lewis acid/base adduct with H2O (hydration), followed by a proton transfer to form a dihydroxide molecule (hydrolysis); this process is repeated until all oxo groups are hydrolyzed. The physisorption (hydration) for each H2O addition was predicted to be exothermic, ca. -20 kcal/mol. The hydrolysis products are preferred energetically over the hydration products for the +IV and +V oxidation states. The compounds with AnVI are a turning point in terms of favoring hydration over hydrolysis. For AnVIIO3(OH), hydration products are preferred, and only two waters can bind; the complete hydrolysis process is now endothermic, and the oxidation state for the An in An(OH)7 is +VI with two OH groups each having one-half an electron. The natural bond order charges and the reaction energies provide insights into the nature of the hydrolysis/hydration processes. The actinide charges and bond ionicity generally decrease across the period. The ionic character decreases as the oxidation state and coordination number increase so that covalency increases moving to the right in the actinide period.
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Affiliation(s)
- Eddy M Lontchi
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Lauren M Tatina
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Alyssa C Caccamo
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Amber N Gomez
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - John K Gibson
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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22
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Wacker JN, Nicholas AD, Vasiliu M, Marwitz AC, Bertke JA, Dixon DA, Knope KE. Impact of Noncovalent Interactions on the Structural Chemistry of Thorium(IV)-Aquo-Chloro Complexes. Inorg Chem 2021; 60:6375-6390. [PMID: 33885290 DOI: 10.1021/acs.inorgchem.1c00099] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Five novel tetravalent thorium (Th) compounds that consist of Th(H2O)xCly structural units were isolated from acidic aqueous solutions using a series of nitrogen-containing heterocyclic hydrogen (H) bond donors. Taken together with three previously reported phases, the compounds provide a series of monomeric ThIV complexes wherein the effects of noncovalent interactions (and H-bond donor identity) on Th structural chemistry can be examined. Seven distinct structural units of the general formulas [Th(H2O)xCl8-x]x-4 (x = 2, 4) and [Th(H2O)xCl9-x]x-5 (x = 5-7) are described. The complexes range from chloride-deficient [Th(H2O)7Cl2]2+ to chloride-rich [Th(H2O)2Cl6]2- species, and theory was used to understand the relative energies that separate complexes within this series via the stepwise chloride addition to an aquated Th cation. Electronic structure theory predicted the reaction energies of chloride addition and release of water through a series of transformations, generally highlighting an energetic driving force for chloride complexation. To probe the role of the counterion in the stabilization of these complexes, electrostatic potential (ESP) surfaces were calculated. The ESP surfaces indicated a dependence of the chloride distribution about the Th metal center on the pKa of the countercation, highlighting the directing effects of noncovalent interactions (e.g., Hbonding) on Th speciation.
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Affiliation(s)
- Jennifer N Wacker
- Department of Chemistry, Georgetown University, Washington, D.C. 20057, United States
| | - Aaron D Nicholas
- Department of Chemistry, The George Washington University, Washington, D.C. 20052, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Alexander C Marwitz
- Department of Chemistry, Georgetown University, Washington, D.C. 20057, United States
| | - Jeffery A Bertke
- Department of Chemistry, Georgetown University, Washington, D.C. 20057, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Karah E Knope
- Department of Chemistry, Georgetown University, Washington, D.C. 20057, United States
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23
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Abstract
Thermodynamic properties including bond dissociation energies (BDEs), heats of formation, and gas-phase acidities for the hydrides and dimers of chalcogens and halogens, H2Y, HX, Y2, and X2 for Y = Se, Te, and At and X = Br, I, and At, have been predicted using the Feller-Peterson-Dixon composite-correlated molecular orbital theory approach. A full four-component CCSD(T) approach was used to calculate the spin-orbit effects on thermodynamic properties, except for Se2, where the AoC-DHF value was used due to strong multireference effects in Se2 for the SO calculations. The calculated results show that the At2 BDE is quite small, 19.5 kcal/mol, with much of the low bond energy due to spin-orbit effects. H2Po is not predicted to be stable to dehydrogenation to Po + H2 in terms of the free energy at 298 K. In the gas phase, HAt is predicted to be a stronger acid than H2SO4. The current results provide insights into potential difficulties in the actual experimental observation of such species for heavy elements.
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Affiliation(s)
- Monica Vasiliu
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - Kirk A Peterson
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
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24
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Zhu Z, Marshall M, Harris RM, Bowen KH, Vasiliu M, Dixon DA. Th 2O -, Th 2Au -, and Th 2AuO 1,2- Anions: Photoelectron Spectroscopic and Computational Characterization of Energetics and Bonding. J Phys Chem A 2021; 125:258-271. [PMID: 33327720 DOI: 10.1021/acs.jpca.0c09766] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The observation and characterization of the anions: Th2O-, Th2Au-, and Th2AuO1,2- is reported. These species were studied through a synergetic combination of anion photoelectron spectroscopy and ab initio correlated molecular orbital theory calculations at the CCSD(T) level with large correlation-consistent basis sets. To better understand the energetics and bonding in these anions and their corresponding neutrals, a range of smaller diatomic to tetratomic species were studied computationally. Correlated molecular orbital theory calculations at the CCSD(T) level showed that in most of these cases, there are close-lying anions and neutral clusters with different geometries and spin states and are consistent with the experimentally observed spectra. Thus, comparison of experimentally determined and computationally predicted vertical detachment energies and electron affinities for different optimized geometries and spin states shows excellent agreement to within 0.1 eV. The structures for both the neutrals and anions have a significant ionic component to the bonding because of the large electron affinity of the Au atom and modest ionization potentials for Th2, Th2O, and Th2O2. The analysis of the bonding for the Th-Th bonds from the molecular orbitals is consistent with this ionic model. The results show that there is a wide variation in the bond distance from 2.7 to 3.5 Å for the Th-Th bonds all of which are less than twice the atomic radius of Th of 3.6 Å. The bond distances encompass bond orders from 4 to 0. There can be different bond orders for the same bond distance depending on the nature of the ionic bonding suggesting that one may not be able to correlate the bond order with the bond distance in these types of clusters. In addition, the presence of an Au atom may provide a unique probe of the bonding in such clusters because of its ability to accept an electron from clusters with modest ionization potentials.
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Affiliation(s)
- Zhaoguo Zhu
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Mary Marshall
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Rachel M Harris
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Kit H Bowen
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
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25
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Giustra ZX, Chen G, Vasiliu M, Karkamkar A, Autrey T, Dixon DA, Liu SY. A comparison of hydrogen release kinetics from 5- and 6-membered 1,2-BN-cycloalkanes. RSC Adv 2021; 11:34132-34136. [PMID: 35497319 PMCID: PMC9042405 DOI: 10.1039/d1ra07477f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Accepted: 10/12/2021] [Indexed: 11/21/2022] Open
Abstract
The reaction order and Arrhenius activation parameters for spontaneous hydrogen release from cyclic amine boranes, i.e., BN-cycloalkanes, were determined for 1,2-BN-cyclohexane (1) and 3-methyl-1,2-BN-cyclopentane (2) in tetraglyme. Computational analysis identified a mechanism involving catalytic substrate activation by a ring-opened form of 1 or 2 as being consistent with experimental observations. The reaction order and Arrhenius activation parameters for spontaneous hydrogen release from cyclic amine boranes, i.e., BN-cycloalkanes, were determined for 1,2-BN-cyclohexane (1) and 3-methyl-1,2-BN-cyclopentane (2) in tetraglyme.![]()
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Affiliation(s)
- Zachary X. Giustra
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467-3860, USA
| | - Gang Chen
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467-3860, USA
| | - Monica Vasiliu
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0036, USA
| | - Abhijeet Karkamkar
- Pacific Northwest National Laboratories, Richland, Washington 99353, USA
| | - Tom Autrey
- Pacific Northwest National Laboratories, Richland, Washington 99353, USA
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0036, USA
| | - Shih-Yuan Liu
- Department of Chemistry, Boston College, Chestnut Hill, Massachusetts 02467-3860, USA
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26
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Mason MM, Lee ZR, Vasiliu M, Wachs IE, Dixon DA. Initial Steps in the Selective Catalytic Reduction of NO with NH3 by TiO2-Supported Vanadium Oxides. ACS Catal 2020. [DOI: 10.1021/acscatal.0c03693] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marcos M. Mason
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa Alabama 35487-0336, United States
| | - Zachary R. Lee
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa Alabama 35487-0336, United States
| | - Israel E. Wachs
- Operando Molecular Spectroscopy & Catalysis Laboratory, Department of Chemical and Biomolecular Engineering, Lehigh University, Iacocca Hall, Bethlehem Pennsylvania 18015, United States
| | - David A. Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa Alabama 35487-0336, United States
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27
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Dau PD, Vasiliu M, Wilson RE, Dixon DA, Gibson JK. Hydrolysis of Metal Dioxides Differentiates d-block from f-block Elements: Pa(V) as a 6d Transition Metal; Pr(V) as a 4f “Lanthanyl”. J Phys Chem A 2020; 124:9272-9287. [DOI: 10.1021/acs.jpca.0c08171] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Phuong D. Dau
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Monica Vasiliu
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - Richard E. Wilson
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - John K. Gibson
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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28
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Affiliation(s)
- Monica Vasiliu
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - Kirk A. Peterson
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - David A. Dixon
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
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29
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Saal T, Blastik ZE, Haiges R, Nirmalchandar A, Baxter AF, Christe KO, Vasiliu M, Dixon DA, Beier P, Prakash GKS. Protonierung von CH
3
N
3
und CF
3
N
3
in Supersäuren: Isolierung und strukturelle Charakterisierung von langlebigen Methyl‐ und Trifluormethylamino‐Diazonium‐Ionen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202002750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Thomas Saal
- Loker Hydrocarbon Research Institute and Department of Chemistry University of Southern California University Park Los Angeles California 90089-1661 USA
| | - Zsófia E. Blastik
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo nam. 2 160 00 Prague 6 Czech Republic
- Department of Organic Chemistry Faculty of Science Charles University Hlavova 2030/8 128 43 Prague Czech Republic
| | - Ralf Haiges
- Loker Hydrocarbon Research Institute and Department of Chemistry University of Southern California University Park Los Angeles California 90089-1661 USA
| | - Archith Nirmalchandar
- Loker Hydrocarbon Research Institute and Department of Chemistry University of Southern California University Park Los Angeles California 90089-1661 USA
| | - Amanda F. Baxter
- Loker Hydrocarbon Research Institute and Department of Chemistry University of Southern California University Park Los Angeles California 90089-1661 USA
| | - Karl O. Christe
- Loker Hydrocarbon Research Institute and Department of Chemistry University of Southern California University Park Los Angeles California 90089-1661 USA
| | - Monica Vasiliu
- Department Chemistry The University of Alabama Tuscaloosa AL 35487 USA
| | - David A. Dixon
- Department Chemistry The University of Alabama Tuscaloosa AL 35487 USA
| | - Petr Beier
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo nam. 2 160 00 Prague 6 Czech Republic
| | - G. K. Surya Prakash
- Loker Hydrocarbon Research Institute and Department of Chemistry University of Southern California University Park Los Angeles California 90089-1661 USA
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30
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Saal T, Blastik ZE, Haiges R, Nirmalchandar A, Baxter AF, Christe KO, Vasiliu M, Dixon DA, Beier P, Prakash GKS. Protonation of CH 3 N 3 and CF 3 N 3 in Superacids: Isolation and Structural Characterization of Long-Lived Methyl- and Trifluoromethylamino Diazonium Ions. Angew Chem Int Ed Engl 2020; 59:12520-12526. [PMID: 32374510 DOI: 10.1002/anie.202002750] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Revised: 03/27/2020] [Indexed: 11/11/2022]
Abstract
The methylamino diazonium cations [CH3 N(H)N2 ]+ and [CF3 N(H)N2 ]+ were prepared as their low-temperature stable [AsF6 ]- salts by protonation of azidomethane and azidotrifluoromethane in superacidic systems. They were characterized by NMR and Raman spectroscopy. Unequivocal proof of the protonation site was obtained by the crystal structures of both salts, confirming the formation of alkylamino diazonium ions. The Lewis adducts CH3 N3 ⋅AsF5 and CF3 N3 ⋅AsF5 were also prepared and characterized by low-temperature NMR and Raman spectroscopy, and also by X-ray structure determination for CH3 N3 ⋅AsF5 . Electronic structure calculations were performed to provide additional insights. Attempted electrophilic amination of aromatics such as benzene and toluene with methyl- and trifluoromethylamino diazonium ions were unsuccessful.
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Affiliation(s)
- Thomas Saal
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, University Park, Los Angeles, CA, 90089-1661, USA
| | - Zsófia E Blastik
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nam. 2, 160 00, Prague 6, Czech Republic.,Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 2030/8, 128 43, Prague, Czech Republic
| | - Ralf Haiges
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, University Park, Los Angeles, CA, 90089-1661, USA
| | - Archith Nirmalchandar
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, University Park, Los Angeles, CA, 90089-1661, USA
| | - Amanda F Baxter
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, University Park, Los Angeles, CA, 90089-1661, USA
| | - Karl O Christe
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, University Park, Los Angeles, CA, 90089-1661, USA
| | - Monica Vasiliu
- Department Chemistry, The University of Alabama, Tuscaloosa, AL, 35487, USA
| | - David A Dixon
- Department Chemistry, The University of Alabama, Tuscaloosa, AL, 35487, USA
| | - Petr Beier
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo nam. 2, 160 00, Prague 6, Czech Republic
| | - G K Surya Prakash
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, University Park, Los Angeles, CA, 90089-1661, USA
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31
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Hu Y, Persaud RR, Vasiliu M, Dixon DA. Different Carbonate Isomers Formed by the Addition of CO 2 to M 3O 6– for M = Ti, Zr, and Hf. J Phys Chem A 2020; 124:5402-5407. [DOI: 10.1021/acs.jpca.0c03836] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yiqin Hu
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Rudradatt R. Persaud
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - David A. Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
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32
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Vasiliu M, Trabelsi T, Francisco JS, Christe KO, Dixon DA. Energetic Properties, Spectroscopy, and Reactivity of NF 3O. J Phys Chem A 2020; 124:5237-5245. [PMID: 32482076 DOI: 10.1021/acs.jpca.0c03733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The heats of formation of NF3O and similar C, S, and Si systems are predicted using the accurate composite computational chemistry Feller-Peterson-Dixon (FPD) method. The harmonic vibrational frequencies at the CCSD(T)/aug-cc-pVTZ level are reported and compared to the experimental values for NF3O, its isoelectronic species CF3O- and NF4+, and NF3. The infrared intensities were calculated at the MP2/aug-cc-pVTZ level and show that the infrared absorption is predicted to be like those of CF2Cl2 and SF6 within a factor of ∼2. The calculated heats of formation are in good agreement with the available experimental values. These heats of formation are used to calculate a range of bond dissociation energies (BDEs). It is predicted that NF3O is unlikely to decompose either thermally or photolytically in the troposphere. The potential energy curves for the decomposition of NF3O to NF2O + F are all repulsive, as are the channels to form NF3 and either O3P or O1D. The predicted persistence of NF3O in the troposphere is attributed to the high barrier of its reaction with the OH radical and that light with the wavelength needed for its photodissociation will not reach the troposphere. Reliable experimental measurements of the global warming potential of NF3O are needed to confirm our predictions that NF3O is like NF3 in this respect.
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Affiliation(s)
- Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Tarek Trabelsi
- Department of Earth and Environmental Science and Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6243, United States
| | - Joseph S Francisco
- Department of Earth and Environmental Science and Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6243, United States
| | - Karl O Christe
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
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33
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Affiliation(s)
- Trent H. Stein
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - Anthony J. Arduengo
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
| | - David A. Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336, United States
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34
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Shreiber ST, Kaplan PT, Hughes RP, Vasiliu M, Dixon DA, Cramer RE, Vicic DA. Syntheses, solution behavior, and computational bond length analyses of trifluoromethyl and perfluoroethyl cuprate salts. J Fluor Chem 2020. [DOI: 10.1016/j.jfluchem.2020.109518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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35
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Barnett KL, Vasiliu M, Stein TH, Delahay MV, Qu F, Gerlach DL, Dixon DA, Shaughnessy KH. Experimental and Computational Study of the Structure, Steric Properties, and Binding Equilibria of Neopentylphosphine Palladium Complexes. Inorg Chem 2020; 59:5579-5592. [DOI: 10.1021/acs.inorgchem.0c00266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kerry L. Barnett
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Trent H. Stein
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Matthew V. Delahay
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Fengrui Qu
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Deidra L. Gerlach
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - David A. Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Kevin H. Shaughnessy
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
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36
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Vasiliu M, Jian T, Gibson JK, Peterson KA, Dixon DA. A Computational Assessment of Actinide Dioxide Cations AnO22+ for An = U to Lr: The Limited Stability Range of the Hexavalent Actinyl Moiety, [O═An═O]2+. Inorg Chem 2020; 59:4554-4566. [DOI: 10.1021/acs.inorgchem.9b03690] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Monica Vasiliu
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - Tian Jian
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - John K. Gibson
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Kirk A. Peterson
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - David A. Dixon
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
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37
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Kelley SP, Smetana V, Nuss JS, Dixon DA, Vasiliu M, Mudring AV, Rogers RD. Dehydration of UO 2Cl 2·3H 2O and Nd(NO 3) 3·6H 2O with a Soft Donor Ligand and Comparison of Their Interactions through X-ray Diffraction and Theoretical Investigation. Inorg Chem 2020; 59:2861-2869. [PMID: 32040307 DOI: 10.1021/acs.inorgchem.9b03228] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We investigated whether the relatively Lewis basic imidazole-2-thiones could be used to substitute water ligands bound to f-element cations and generate f-element soft donor complexes. Reactions of 1,3-diethylimidazole-2-thione (C2C2ImT) with Nd(NO3)3·6H2O and UO2Cl2·3H2O led to the isolation of the anhydrous thione complexes Nd(NO3)3(C2C2ImT)3 and UO2Cl2(C2C2ImT)2, characterized by single crystal X-ray diffraction. Differences in the strength of metal-thione interactions have been examined by means of the crystal structure analysis and density functional theory (DFT) calculations. The C2C2ImT ligands were found to be affected by both coordination and noncovalent interactions, making it impossible to deconvolute the effects of one from the other. Calculated partial atomic charges indicated greater ligand-to-metal charge transfer in the [UO2]2+ complex, indicative of a stronger interaction. The reactivity of C2C2ImT demonstrates its usefulness in the preparation of f-element soft donor complexes from readily available hydrates that could be useful intermediates for promoting the coordination and studying the effects of soft donor anions.
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Affiliation(s)
- Steven P Kelley
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Volodymyr Smetana
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 106 91 Stockholm, Sweden
| | - Joseph S Nuss
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Anja-Verena Mudring
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 106 91 Stockholm, Sweden
| | - Robin D Rogers
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States.,Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius väg 16C, 106 91 Stockholm, Sweden
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38
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Affiliation(s)
- Joshua H. Marks
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
| | - Paula Kahn
- Department of Chemistry & Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Monica Vasiliu
- Department of Chemistry & Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - David A. Dixon
- Department of Chemistry & Biochemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Michael A. Duncan
- Department of Chemistry, University of Georgia, Athens, Georgia 30602, United States
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39
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Hu Y, Vasiliu M, Thanthiriwatte KS, Jackson VE, Chaka AM, Dixon DA. Thermodynamics of Metal Carbonates and Bicarbonates and Their Hydrates for Mg, Ca, Fe, and Cd Relevant to Mineral Energetics. J Phys Chem A 2020; 124:1829-1840. [DOI: 10.1021/acs.jpca.9b11741] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yiqin Hu
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - K. Sahan Thanthiriwatte
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Virgil E. Jackson
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Anne M. Chaka
- Pacific Northwest National Laboratory, P.O. Box 999, MS K8-96, Richland, Washington 99352, United States
| | - David A. Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
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40
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Veerakanellore GB, Smith CM, Vasiliu M, Oliver AG, Dixon DA, Carrick JD. Synthesis of 1 H-Pyrazol-5-yl-pyridin-2-yl-[1,2,4]triazinyl Soft-Lewis Basic Complexants via Metal and Oxidant Free [3 + 2] Dipolar Cycloaddition of Terminal Ethynyl Pyridines with Tosylhydrazides. J Org Chem 2019; 84:14558-14570. [PMID: 31647644 DOI: 10.1021/acs.joc.9b02088] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Soft-Lewis basic complexants that facilitate chemoselective separation of the minor actinides from the lanthanides are critical to the closure of the nuclear fuel cycle. Complexants that modulate covalent orbital interactions with relevant metals of interest can facilitate desired outcomes in liquid-liquid separation, allowing for further transmutative processes that decrease issues related with storage of spent nuclear fuel from energy and weapons production. Synthesis of previously unexplored scaffolds seeks to improve performance over benchmark complexants. In the current work, an intermolecular, thermally initiated, and DBU-assisted [3 + 2] cycloaddition of 3-(6-ethynyl-pyridin-2-yl)-5,6-diphenyl-[1,2,4]triazine dipolarophiles with structurally diverse 4-methylbenzenesulfono-hydrazides afforded 21 yet-to-be reported examples in 42-68% yield and modest regioselectivity for the desired regioisomer. Preparation of requisite starting materials, method definition, dipole and dipolarophile scope, ten-fold scale-up reaction, and downstream functional group interconversion are reported herein.
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Affiliation(s)
- Giri Babu Veerakanellore
- Department of Chemistry , Tennessee Technological University , Cookeville , Tennessee 38505-0001 , United States
| | - Caris M Smith
- Department of Chemistry and Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Allen G Oliver
- Department of Chemistry , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - David A Dixon
- Department of Chemistry and Biochemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Jesse D Carrick
- Department of Chemistry , Tennessee Technological University , Cookeville , Tennessee 38505-0001 , United States
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41
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Olkhov YA, Allyarov SR, Vasiliu M, Dixon DA, Frolov IA, Demidov SV. Effect of X-ray beam on the molecular–topological structure of the surface of kynar® polyvinylidene fluoride resin. J Fluor Chem 2019. [DOI: 10.1016/j.jfluchem.2019.06.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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42
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Jian T, Dau PD, Shuh DK, Vasiliu M, Dixon DA, Peterson KA, Gibson JK. Activation of Water by Pentavalent Actinide Dioxide Cations: Characteristic Curium Revealed by a Reactivity Turn after Americium. Inorg Chem 2019; 58:14005-14014. [DOI: 10.1021/acs.inorgchem.9b01997] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tian Jian
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Phuong Diem Dau
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - David K. Shuh
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - David A. Dixon
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, Alabama 35401, United States
| | - Kirk A. Peterson
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - John K. Gibson
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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Fang Z, Vasiliu M, Chen X, Gong Y, Andrews L, Dixon DA. Formation of Cerium and Neodymium Isocyanides in the Reactions of Cyanogen with Ce and Nd Atoms in Argon Matrices. J Phys Chem A 2019; 123:8208-8219. [PMID: 31441657 DOI: 10.1021/acs.jpca.9b06026] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Laser ablation of metallic Ce and Nd reacting with cyanogen in excess argon during codeposition at 4 K forms Ce(NC)x and Nd(NC)x for x = 1-3, which are identified from their matrix infrared spectra using cyanogen substituted with 13C and 15N. The electronic structure calculations were performed for isocyano and cyano Cd and Nd compounds for up to n = 4. The frequencies were calculated at the density functional theory level with three different functionals as well as correlated molecular orbital theory (MP2) and are consistent with the experimental assignments and the corresponding 12C/13C isotopic frequency ratios for the isocyano species. The computed frequencies for the analogous cyanide complexes are significantly higher than those for the isocyano isomers, and they are not observed in the spectra. The high spin isocyano complexes are the lowest energy structures. On the basis of the natural population analysis results, the bonding in 4CeNC and 6NdNC is essentially purely ionic with the Ce/Nd in the +I-oxidation state. The bonding for disocyano (3Ce(NC)2 and 5Nd(NC)2) and triisocyano (2Ce(NC)3 and 4Nd(NC)3) complexes is still quite ionic with the lanthanide in the +II and +III formal oxidation states, respectively. For 1Ce(NC)4, the oxidation state is best described as being between +III and +IV. Formation of 5Nd(NC)4 does not really change the electron configuration on the Nd from that in 4Nd(NC)3 and the oxidation state on the Nd remains at +III. Although Nd compounds with up to 3 NC- groups have more ionic binding than do the corresponding Ce compounds, Ce(NC)4 has more ionic binding than does Nd(NC)4. The ionic nature of isocyano Ce and Nd complexes decreases as the number of isocyano groups increases. The energetics of formation of the isocyano Ce and Nd complexes using cyanogen or CN radicals are calculated to be mostly due to exothermic processes, with the exothermicity decreasing as the number of isocyano groups increases.
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Affiliation(s)
- Zongtang Fang
- Department of Chemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Monica Vasiliu
- Department of Chemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
| | - Xiuting Chen
- Department of Radiochemistry, Shanghai Institute of Applied Physics , Chinese Academy of Sciences , Shanghai 201800 , China
| | - Yu Gong
- Department of Radiochemistry, Shanghai Institute of Applied Physics , Chinese Academy of Sciences , Shanghai 201800 , China.,Department of Chemistry , University of Virginia , Charlottesville , Virginia 22904-4319 , United States
| | - Lester Andrews
- Department of Chemistry , University of Virginia , Charlottesville , Virginia 22904-4319 , United States
| | - David A Dixon
- Department of Chemistry , The University of Alabama , Tuscaloosa , Alabama 35487-0336 , United States
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44
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Hu H, Vasiliu M, Stein TH, Qu F, Gerlach DL, Dixon DA, Shaughnessy KH. Synthesis, Structural Characterization, and Coordination Chemistry of (Trineopentylphosphine)palladium(aryl)bromide Dimer Complexes ([(Np3P)Pd(Ar)Br]2). Inorg Chem 2019; 58:13299-13313. [DOI: 10.1021/acs.inorgchem.9b02164] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Huaiyuan Hu
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Trent H. Stein
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Fengrui Qu
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Deidra L. Gerlach
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - David A. Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
| | - Kevin H. Shaughnessy
- Department of Chemistry and Biochemistry, The University of Alabama, Box 870336, Tuscaloosa, Alabama 35487-0336, United States
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45
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Guan E, Debefve L, Vasiliu M, Zhang S, Dixon DA, Gates BC. MgO-Supported Iridium Metal Pair-Site Catalysts Are More Active and Resistant to CO Poisoning than Analogous Single-Site Catalysts for Ethylene Hydrogenation and Hydrogen–Deuterium Exchange. ACS Catal 2019. [DOI: 10.1021/acscatal.9b03463] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
| | | | - Monica Vasiliu
- Department of Chemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Shengjie Zhang
- Department of Chemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - David A. Dixon
- Department of Chemistry, University of Alabama, Tuscaloosa, Alabama 35487, United States
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46
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Jaegers NR, Lai J, He Y, Walter E, Dixon DA, Vasiliu M, Chen Y, Wang C, Hu MY, Mueller KT, Wachs IE, Wang Y, Hu JZ. Inside Back Cover: Mechanism by which Tungsten Oxide Promotes the Activity of Supported V
2
O
5
/TiO
2
Catalysts for NO
X
Abatement: Structural Effects Revealed by
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V MAS NMR Spectroscopy (Angew. Chem. Int. Ed. 36/2019). Angew Chem Int Ed Engl 2019. [DOI: 10.1002/anie.201908846] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Nicholas R. Jaegers
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
- Voiland School of Chemical Engineering and BioengineeringWashington State University Pullman WA 99163 USA
| | - Jun‐Kun Lai
- OperandoMolecular Spectroscopy & Catalysis LaboratoryLehigh University Bethlehem PA 18015 USA
| | - Yang He
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
| | - Eric Walter
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
| | - David A. Dixon
- Department of ChemistryThe University of Alabama Tuscaloosa AL 35487 USA
| | - Monica Vasiliu
- Department of ChemistryThe University of Alabama Tuscaloosa AL 35487 USA
| | - Ying Chen
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
| | - Chongmin Wang
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
| | - Mary Y. Hu
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
| | - Karl T. Mueller
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
| | - Israel E. Wachs
- OperandoMolecular Spectroscopy & Catalysis LaboratoryLehigh University Bethlehem PA 18015 USA
| | - Yong Wang
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
- Voiland School of Chemical Engineering and BioengineeringWashington State University Pullman WA 99163 USA
| | - Jian Zhi Hu
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
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47
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Jaegers NR, Lai J, He Y, Walter E, Dixon DA, Vasiliu M, Chen Y, Wang C, Hu MY, Mueller KT, Wachs IE, Wang Y, Hu JZ. Innenrücktitelbild: Mechanism by which Tungsten Oxide Promotes the Activity of Supported V
2
O
5
/TiO
2
Catalysts for NO
X
Abatement: Structural Effects Revealed by
51
V MAS NMR Spectroscopy (Angew. Chem. 36/2019). Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908846] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Nicholas R. Jaegers
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
- Voiland School of Chemical Engineering and BioengineeringWashington State University Pullman WA 99163 USA
| | - Jun‐Kun Lai
- OperandoMolecular Spectroscopy & Catalysis LaboratoryLehigh University Bethlehem PA 18015 USA
| | - Yang He
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
| | - Eric Walter
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
| | - David A. Dixon
- Department of ChemistryThe University of Alabama Tuscaloosa AL 35487 USA
| | - Monica Vasiliu
- Department of ChemistryThe University of Alabama Tuscaloosa AL 35487 USA
| | - Ying Chen
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
| | - Chongmin Wang
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
| | - Mary Y. Hu
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
| | - Karl T. Mueller
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
| | - Israel E. Wachs
- OperandoMolecular Spectroscopy & Catalysis LaboratoryLehigh University Bethlehem PA 18015 USA
| | - Yong Wang
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
- Voiland School of Chemical Engineering and BioengineeringWashington State University Pullman WA 99163 USA
| | - Jian Zhi Hu
- Institute for Integrated Catalysis and Earth and Biological Science DirectoratePacific Northwest National Laboratory Richland WA 99354 USA
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Jaegers NR, Lai J, He Y, Walter E, Dixon DA, Vasiliu M, Chen Y, Wang C, Hu MY, Mueller KT, Wachs IE, Wang Y, Hu JZ. Mechanism by which Tungsten Oxide Promotes the Activity of Supported V
2
O
5
/TiO
2
Catalysts for NO
X
Abatement: Structural Effects Revealed by
51
V MAS NMR Spectroscopy. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904503] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Nicholas R. Jaegers
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
- Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman WA 99163 USA
| | - Jun‐Kun Lai
- OperandoMolecular Spectroscopy & Catalysis Laboratory Lehigh University Bethlehem PA 18015 USA
| | - Yang He
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - Eric Walter
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - David A. Dixon
- Department of Chemistry The University of Alabama Tuscaloosa AL 35487 USA
| | - Monica Vasiliu
- Department of Chemistry The University of Alabama Tuscaloosa AL 35487 USA
| | - Ying Chen
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - Chongmin Wang
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - Mary Y. Hu
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - Karl T. Mueller
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - Israel E. Wachs
- OperandoMolecular Spectroscopy & Catalysis Laboratory Lehigh University Bethlehem PA 18015 USA
| | - Yong Wang
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
- Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman WA 99163 USA
| | - Jian Zhi Hu
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
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49
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Jaegers NR, Lai J, He Y, Walter E, Dixon DA, Vasiliu M, Chen Y, Wang C, Hu MY, Mueller KT, Wachs IE, Wang Y, Hu JZ. Mechanism by which Tungsten Oxide Promotes the Activity of Supported V
2
O
5
/TiO
2
Catalysts for NO
X
Abatement: Structural Effects Revealed by
51
V MAS NMR Spectroscopy. Angew Chem Int Ed Engl 2019; 58:12609-12616. [DOI: 10.1002/anie.201904503] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Indexed: 11/09/2022]
Affiliation(s)
- Nicholas R. Jaegers
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
- Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman WA 99163 USA
| | - Jun‐Kun Lai
- OperandoMolecular Spectroscopy & Catalysis Laboratory Lehigh University Bethlehem PA 18015 USA
| | - Yang He
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - Eric Walter
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - David A. Dixon
- Department of Chemistry The University of Alabama Tuscaloosa AL 35487 USA
| | - Monica Vasiliu
- Department of Chemistry The University of Alabama Tuscaloosa AL 35487 USA
| | - Ying Chen
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - Chongmin Wang
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - Mary Y. Hu
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - Karl T. Mueller
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
| | - Israel E. Wachs
- OperandoMolecular Spectroscopy & Catalysis Laboratory Lehigh University Bethlehem PA 18015 USA
| | - Yong Wang
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
- Voiland School of Chemical Engineering and Bioengineering Washington State University Pullman WA 99163 USA
| | - Jian Zhi Hu
- Institute for Integrated Catalysis and Earth and Biological Science Directorate Pacific Northwest National Laboratory Richland WA 99354 USA
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50
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Wacker JN, Vasiliu M, Colliard I, Ayscue RL, Han SY, Bertke JA, Nyman M, Dixon DA, Knope KE. Monomeric and Trimeric Thorium Chlorides Isolated from Acidic Aqueous Solution. Inorg Chem 2019; 58:10871-10882. [DOI: 10.1021/acs.inorgchem.9b01238] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Jennifer N. Wacker
- Department of Chemistry, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Ian Colliard
- Oregon State University, Department of Chemistry, Corvallis, Oregon 97331, United States
| | - R. Lee Ayscue
- Department of Chemistry, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
| | - Sae Young Han
- Department of Chemistry, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
| | - Jeffery A. Bertke
- Department of Chemistry, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
| | - May Nyman
- Oregon State University, Department of Chemistry, Corvallis, Oregon 97331, United States
| | - David A. Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Karah E. Knope
- Department of Chemistry, Georgetown University, 37th and O Streets NW, Washington, D.C. 20057, United States
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