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Effect of the Solvent on the Crystallographic and Magnetic Properties of Rhenium(IV) Complexes Based on 2,2′-Bipyrimidine Ligand. INORGANICS 2023. [DOI: 10.3390/inorganics11020078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Abstract
Two solvated rhenium(IV) complexes with formula [ReCl4(bpym)]·MeCN (1) and [ReCl4(bpym)]·CH3COOH·H2O (2) (bpym = 2,2′-bipyrimidine) have been prepared and characterized by means of Fourier transform infrared spectroscopy (FT–IR), scanning electron microscopy and energy dispersive X-ray analysis (SEM–EDX), single-crystal X-ray diffraction (XRD) and SQUID magnetometer. 1 and 2 crystallize in the monoclinic system with space groups P21/n and P21/c, respectively. In both compounds, the Re(IV) ion is six-coordinate and bound to four chloride ions and two nitrogen atoms of a 2,2′-bipyrimidine molecule forming a distorted octahedral geometry around the metal ion. In the crystal packing of 1 and 2, intermolecular halogen⋯halogen and π⋯halogen-type interactions are present. Hydrogen bonds take place only in the crystal structure of 2. Both compounds exhibit a similar crystal framework based on halogen bonds. Variable temperature dc magnetic susceptibility measurements performed on microcrystalline samples of 1 and 2 show a similar magnetic behavior for both compounds, with antiferromagnetic exchange between the Re(IV) ions connected mainly through intermolecular Re-Cl⋯Cl-Re interactions.
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2
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Louis-Jean J, Balasekaran SM, Lawler KV, Sanchis-Perucho A, Martínez-Lillo J, Smith D, Forster PM, Salamat A, Poineau F. Coexistence of metamagnetism and slow relaxation of magnetization in ammonium hexafluoridorhenate. RSC Adv 2021; 11:6353-6360. [PMID: 35423149 PMCID: PMC8694846 DOI: 10.1039/d0ra10325j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Accepted: 01/27/2021] [Indexed: 11/21/2022] Open
Abstract
The (NH4)2[ReF6] (1) salt was studied by X-ray diffraction, Raman spectroscopy, theoretical calculations, and magnetic measurements. 1 crystallizes in the trigonal space group P3̄m1 (Re-F = 1.958(5) Å). In the Raman spectrum of 1, splitting of the observed peaks was observed and correlated to the valence frequencies of vibration of the [ReF6]2- anion. The study of the magnetic properties of 1, through DC and AC magnetic susceptibility measurements, reveals the coexistence of metamagnetism and slow relaxation of magnetization at low temperature, which is unusual in the molecular systems based on the paramagnetic 5d metal ions reported so far.
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Affiliation(s)
- James Louis-Jean
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas 4505 South Maryland Parkway Las Vegas Nevada 89154-4003 USA
| | - Samundeeswari M Balasekaran
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas 4505 South Maryland Parkway Las Vegas Nevada 89154-4003 USA
| | - Keith V Lawler
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas 4505 South Maryland Parkway Las Vegas Nevada 89154-4003 USA
| | - Adrián Sanchis-Perucho
- Instituto de Ciencia Molecular (ICMol), Departament de Química Inorgànica, Universitat de València Catedrático José Beltrán 2 46980 Paterna València Spain
| | - José Martínez-Lillo
- Instituto de Ciencia Molecular (ICMol), Departament de Química Inorgànica, Universitat de València Catedrático José Beltrán 2 46980 Paterna València Spain
| | - Dean Smith
- Department of Physics and Astronomy, University of Nevada Las Vegas 4505 South Maryland Parkway Las Vegas Nevada 89154-4003 USA.,HPCAT, X-ray Science Division, Argonne National Laboratory Lemont IL 60439 USA
| | - Paul M Forster
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas 4505 South Maryland Parkway Las Vegas Nevada 89154-4003 USA
| | - Ashkan Salamat
- Department of Physics and Astronomy, University of Nevada Las Vegas 4505 South Maryland Parkway Las Vegas Nevada 89154-4003 USA
| | - Frederic Poineau
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas 4505 South Maryland Parkway Las Vegas Nevada 89154-4003 USA
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3
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Piccinelli F, Bettinelli M, Cano J, Lloret F, Julve M, Dolmella A. Magnetic Properties of a New Hexahalorhenate(IV) Compound and Structural Comparison with Its Hexahaloplatinate(IV) Analog. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Fabio Piccinelli
- Luminescent Materials Laboratory, DB Università di Verona, and INSTM, UdR Verona Strada Le Grazie 15 37134 Verona Italy
| | - Marco Bettinelli
- Luminescent Materials Laboratory, DB Università di Verona, and INSTM, UdR Verona Strada Le Grazie 15 37134 Verona Italy
| | - Joan Cano
- Instituto de Ciencia Molecular (ICMol)/Departament de Química Inorgànica Universitat de València C/ Catedrátco José Beltrán 2 46980 Paterna València Spain
| | - Francesc Lloret
- Instituto de Ciencia Molecular (ICMol)/Departament de Química Inorgànica Universitat de València C/ Catedrátco José Beltrán 2 46980 Paterna València Spain
| | - Miguel Julve
- Instituto de Ciencia Molecular (ICMol)/Departament de Química Inorgànica Universitat de València C/ Catedrátco José Beltrán 2 46980 Paterna València Spain
| | - Alessandro Dolmella
- Department of Pharmaceutical and Pharmacological Sciences University of Padova via F. Marzolo 5 35131 Padova Italy
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Rojas-Dotti C, Moliner N, González R, Martínez-Lillo J. Ligand substitution in cis-bis(acetonitrile)tetrachlororhenium(IV) complex with N,N-dimethylformamide and N,N-dimethylacetamide. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.01.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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5
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Rojas-Dotti C, Moliner N, González R, Martínez-Lillo J. Hexakis(dimethylformamide)iron(II) complex cation in hexahalorhenate(IV)-based salts: synthesis, X-ray structure and magnetic properties. J COORD CHEM 2018. [DOI: 10.1080/00958972.2017.1423477] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Carlos Rojas-Dotti
- Departament de Química Inorgànica/Instituto de Ciencia Molecular (ICMol), Universitat de València, Valencia, Spain
- Cátedra de Química Inorgánica, Facultad de Química, Departamento Estrella Campos, Universidad de la República, Montevideo, Uruguay
| | - Nicolás Moliner
- Departament de Química Inorgànica/Instituto de Ciencia Molecular (ICMol), Universitat de València, Valencia, Spain
| | - Ricardo González
- Cátedra de Química Inorgánica, Facultad de Química, Departamento Estrella Campos, Universidad de la República, Montevideo, Uruguay
| | - José Martínez-Lillo
- Departament de Química Inorgànica/Instituto de Ciencia Molecular (ICMol), Universitat de València, Valencia, Spain
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Pedersen AH, Geoghegan BL, Nichol GS, Lupton DW, Murray KS, Martínez-Lillo J, Gass IA, Brechin EK. Hexahalorhenate(iv) salts of metal oxazolidine nitroxides. Dalton Trans 2017; 46:5250-5259. [PMID: 28374882 DOI: 10.1039/c7dt00752c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Eight coordination compounds of formulae [FeII(L˙)2][ReIVCl6] (1a), [FeII(L˙)2][ReIVBr6] (1b), [CoII(L˙)2][ReIVCl6]·CH3CN (2a), [CoII(L˙)2][ReIVBr6] (2b), [NiII(L˙)(CH3CN)3][ReIVCl6]·CH3CN (3a), [NiII(L˙)(CH3CN)3][ReIVBr6]·3CH3CN (3b), [CuII(L˙)2][ReIVCl6] (4a) and [CuII(L˙)2][ReIVBr6] (4b), where L˙ is the aminoxyl radical chelating ligand, 4,4'-dimethyl-2,2'-di(2-pyridyl)oxazolidine-N-oxide, have been synthesised. Structural and magnetic studies reveal metal-radical intramolecular antiferromagnetic interactions in the [MII(L˙)2]2+ cations in the iron, cobalt and copper based compounds (1a, 1b, 2a, 2b, 4a and 4b) with the central metal ion low-spin in the case of iron (1a and 1b) and a gradual, cobalt based, spin-crossover transition present in 2a and 2b. The nickel based compounds, 3a and 3b, were analysed in the dried form (3a(dried) and 3b(dried)) and directly in acetonitrile (3a(solvated) and 3b(solvated)). Microanalysis and IR spectroscopy on 3a(dried) and 3b(dried) suggest that the dried samples are best formulated as [NiII(L˙)(H2O)3][ReIVX6], where X = Cl (3a(dried)) and Br (3b(dried)). All forms of 3a and 3b exhibit cationic metal-radical ferromagnetic interactions resulting in S = 3/2 ground states. In addition, 3a(dried) exhibits spin-canting behaviour with an ordering temperature of 2.7 K, an open hysteresis loop with a coercive field Hc = 580 Oe, and a remanent magnetisation Mr = 0.21μB, resulting in a canting angle of ∼1.8°. In contrast, 3b(dried) shows no spin-canting behaviour; a maximum in χMvs. T at T = 3 K suggesting long-range antiferromagnetic ordering. 3a(solvated) and 3b(solvated) show no indication of long-range magnetic ordering, unlike 4a and 4b where anomalies are evident in the low-temperature magnetic susceptibility measurements.
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Affiliation(s)
- Anders H Pedersen
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, EH9 3FJ Edinburgh, Scotland, UK.
| | - Blaise L Geoghegan
- School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton BN2 4GJ, UK.
| | - Gary S Nichol
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, EH9 3FJ Edinburgh, Scotland, UK.
| | - David W Lupton
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Keith S Murray
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - José Martínez-Lillo
- Departament de Química Inorgànica/Instituto de Ciencia Molecular (ICMol), Universitat de València, C/Catedrático José Beltrán 2, 46980, Paterna (València), Spain.
| | - Ian A Gass
- School of Pharmacy and Biomolecular Sciences, University of Brighton, Brighton BN2 4GJ, UK.
| | - Euan K Brechin
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, EH9 3FJ Edinburgh, Scotland, UK.
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7
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Magnetic anisotropy in two- to eight-coordinated transition–metal complexes: Recent developments in molecular magnetism. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2015.06.013] [Citation(s) in RCA: 304] [Impact Index Per Article: 38.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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8
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Yalçıntaş E, Scheinost AC, Gaona X, Altmaier M. Systematic XAS study on the reduction and uptake of Tc by magnetite and mackinawite. Dalton Trans 2016; 45:17874-17885. [DOI: 10.1039/c6dt02872a] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The mechanisms for the reduction and uptake of Tc by magnetite (Fe3O4) and mackinawite (FeS) are investigated using X-ray absorption spectroscopy (XANES and EXAFS), in combination with thermodynamic calculations of the Tc/Fe systems and accurate characterization of the solution properties (pHm, pe, [Tc]).
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Affiliation(s)
- Ezgi Yalçıntaş
- Institute for Nuclear Waste Disposal
- Karlsruhe Institute of Technology
- Germany
| | - Andreas C. Scheinost
- Institute of Resource Ecology
- Helmholtz-Zentrum Dresden – Rossendorf
- Germany
- The Rossendorf Beamline at ESRF
- Grenoble
| | - Xavier Gaona
- Institute for Nuclear Waste Disposal
- Karlsruhe Institute of Technology
- Germany
| | - Marcus Altmaier
- Institute for Nuclear Waste Disposal
- Karlsruhe Institute of Technology
- Germany
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9
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Martínez-Lillo J, Julve M, Brechin EK. Hexakis(diethylacetamide)iron(II) hexahalorhenate(IV) ionic salts: X-ray structures and magnetic properties. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.05.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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10
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Martínez-Lillo J, Cano J, Wernsdorfer W, Brechin EK. The effect of crystal packing and Re(IV) ions on the magnetisation relaxation of [Mn6]-based molecular magnets. Chemistry 2015; 21:8790-8. [PMID: 25951415 PMCID: PMC4471585 DOI: 10.1002/chem.201500439] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2015] [Indexed: 11/09/2022]
Abstract
The energy barrier to magnetisation relaxation in single-molecule magnets (SMMs) proffers potential technological applications in high-density information storage and quantum computation. Leading candidates amongst complexes of 3d metals ions are the hexametallic family of complexes of formula [Mn6O2(R-sao)6(X)2(solvent)y] (saoH2=salicylaldoxime; X=mono-anion; y=4–6; R=H, Me, Et, and Ph). The recent synthesis of cationic [Mn6][ClO4]2 family members, in which the coordinating X ions were replaced with non-coordinating anions, opened the gateway to constructing families of novel [Mn6] salts in which the identity and nature of the charge balancing anions could be employed to alter the physical properties of the complex. Herein we demonstrate initial experiments to show that this is indeed possible. By replacing the diamagnetic ClO4− anions with the highly anisotropic ReIV ion in the form of [ReIVCl6]2−, the energy barrier to magnetisation relaxation is increased by up to 30 %.
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Affiliation(s)
- José Martínez-Lillo
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland (UK).
| | - Joan Cano
- Fundació General de la Universitat de València (FGUV), Instituto de Ciencia Molecular (ICMol), Universitat de València, C/Catedrático José Beltrán n° 2, 46980 Paterna (València) (Spain)
| | - Wolfgang Wernsdorfer
- Institut Néel-CNRS, BP 166, 25 Avenue des Martyrs, 38042 Grenoble Cedex 9 (France)
| | - Euan K Brechin
- EaStCHEM School of Chemistry, The University of Edinburgh, David Brewster Road, Edinburgh, EH9 3FJ, Scotland (UK).
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11
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Martínez-Lillo J, Kong J, Barros WP, Faus J, Julve M, Brechin EK. Metamagnetic behaviour in a new Cu(II)Re(IV) chain based on the hexachlororhenate(IV) anion. Chem Commun (Camb) 2015; 50:5840-2. [PMID: 24759947 DOI: 10.1039/c4cc01564a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new chloro-bridged heterobimetallic Cu(II)Re(IV) chain of formula {Cu(pyim)(Him)2ReCl6}n·MeCN (·MeCN) has been prepared and magnetostructurally characterised. Compound is the first example of the [Re(IV)Cl6](2-) anion acting as a metalloligand towards a paramagnetic metal ion.
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Affiliation(s)
- José Martínez-Lillo
- EaStCHEM School of Chemistry, The University of Edinburgh, West Mains Road, EH9 3JJ, Edinburgh, Scotland, UK.
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12
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Towards multifunctional magnetic systems through molecular-programmed self assembly of Re(IV) metalloligands. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2014.11.007] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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Hexabromorhenate(IV) salt of a trans-dioxorhenium(V) cation: X-ray structure and magnetic properties. Polyhedron 2014. [DOI: 10.1016/j.poly.2013.09.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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15
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Armentano D, Martínez-Lillo J. Hexachlororhenate(IV) salts of ruthenium(III) cations: X-ray structure and magnetic properties. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2011.09.010] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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16
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Abstract
AbstractThe reduction of pertechnetate (TcO4−) with freshly prepared amorphous iron sulfide was investigated. The amorphous iron sulfide (FeS) was shown to have an elemental composition of FeS0.97for all of the size fractions and a point of zero charge of pHpzc=7.4. Solubility studies of FeS in various buffers indicated that in the pH range 6.1–9.0, the concentrations of dissociated Fe2+and S2−were negligible. The reductive immobilization of TcO4−with FeS was shown to be accelerated by increasing ionic strength and strongly pH dependent. At pH values below the pHpzc, the positively charged FeS surface reacted much faster with TcO4−and had higher immobilization yields relative to the negatively charged FeS surface at pH values above pHpzc. The TcO4−−FeS reaction is consistent with a surface mediated reaction through ligand exchange. The TcO4−−FeS reductive immobilization reaction product was characterized by X-ray absorption near edge spectroscopy (XANES), extended X-ray absorption fine structure (EXAFS), Fourier transform infrared spectroscopy (FT-IR), and energy dispersive X-ray spectroscopy (EDS) and found to be predominantly TcO2. Studies on the reductive capacity of the FeS and the long term stability of the TcO4−−FeS reaction product under both anaerobic and aerobic environments shows the potential utility of thein situgaseous (hydrogen sulfide gas) immobilization technology in solidification of TcO4−by creating a FeS permeable reaction barrier in the vadose zone.
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Affiliation(s)
- Yongjian Liu
- University of Missouri-Columbia, Department of Chemistry, Columbia, U.S.A
| | - Jeff Terry
- Illinois Institute of Technology, Department of Biological, Chemical, and Physical S, Chicago, U.S.A
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17
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Liu Y, Terry J, Jurisson SS. Potential interferences on the pertechnetate-sulfide immobilization reaction. RADIOCHIM ACTA 2009. [DOI: 10.1524/ract.2009.1569] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Münze R. Stand Und Entwicklungstendenzen auf Dem Gebiet Der Radiochemie und Chemischen Kerntechnik Chemie Ausgewäiilter Radioaktiver Elemente. ACTA ACUST UNITED AC 2008. [DOI: 10.1080/10256017808622585] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- R. Münze
- a Akademic der Wissenschaften der DDr, Zentralinstitut für Kernforschung Rossendorf
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19
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Spitsyn VI, Kuzina AF, Oblova AA. Present State of the Chemistry of Technetium. RUSSIAN CHEMICAL REVIEWS 2007. [DOI: 10.1070/rc1977v046n11abeh002189] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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20
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Deutsch E, Libson K, Jurisson S, Lindoy LF. Technetium Chemistry and Technetium Radiopharmaceuticals. PROGRESS IN INORGANIC CHEMISTRY 2007. [DOI: 10.1002/9780470166314.ch2] [Citation(s) in RCA: 107] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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21
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Benson WR, Yang GC, Heitzmann MW, Ford LA. Electron spin resonance spectroscopy studies of 99Tc(IV) in aqueous solutions. J Labelled Comp Radiopharm 2006. [DOI: 10.1002/jlcr.2580150141] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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22
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González R, Chiozzone R, Kremer C, De Munno G, Nicolò F, Lloret F, Julve M, Faus J. Magnetic studies on hexaiodorhenate(IV) salts of univalent cations. Spin canting and magnetic ordering in K2[ReI6] with Tc = 24 K. Inorg Chem 2003; 42:2512-8. [PMID: 12691556 DOI: 10.1021/ic020531j] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The ionic salts of rhenium(IV) of formula (Cat)(2)[ReI(6)] with Cat = Li(+) (1), Na(+) (2), K(+) (3), Rb(+) (4), Cs(+) (5), NH(4)(+) (6), and AsPh(4)(+) (7) [AsPh(4)(+) = tetraphenylarsonium cation] have been synthesized, and the structures of two of them (namely, 3 and 6) were determined by single-crystal X-ray diffraction. 3 crystallizes in the monoclinic system, space group Pn, with a = 7.815(1) A, b = 7.874(1) A, c = 11.335(1) A, beta = 90.38(1) degrees, and Z = 2 whereas 6 crystallizes in the tetragonal system, space group P4/mnc, with a = 7.881(1) A, b = 7.881(1) A, c = 11.474(2) A, and Z = 2. The structures of 3 and 6 are made up of discrete [ReI(6)](2)(-) anions and K(+) (3) or NH(4)(+) (6) cations held together by electrostatic forces (3 and 6) and N-H.I hydrogen bonds (6). The rhenium(IV) cation in 3 and 6 is surrounded by six iodide ligands in an octahedral environment with the Re-I bond lengths varying in a very narrow range [2.704(3)-2.738(3) and 2.716(1)-2.722(2) A for 3 and 6, respectively]. The [ReI(6)](2)(-) anions in 6 describe a tetragonally distorted body-centered cubic structure. In 3, the arrangement of these units is similar but more distorted. The different arrangement of the anions in 3 and 6 accounts for the centrosymmetric (6) and non-centrosymmetric (3) structures observed. The magnetic properties of 1-7 were investigated in the temperature range 2.0-300 K. The magnetic behavior of 7 is that of a magnetically diluted Re(IV) complex with a large value of the zero-field splitting of the ground level (|2D| = 49.8 cm(-)(1)) whereas those of 1, 2, and 4-6 are typical of antiferromagnetically coupled systems with susceptibility maxima at 28 (1), 27 (2), 21 (4), 16 (5), and 20 K (6). In the case of compound 3, its magnetic behavior in the high-temperature range is parallel to that observed in the parent salts but below 24 K it is a weak ferromagnet with a canting angle of ca. 1.2 degrees.
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Affiliation(s)
- Ricardo González
- Cátedra de Química Inorgánica, Facultad de Química de la Universidad de la República, Avda. General Flores 2124, CC 1157 Montevideo, Uruguay
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23
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Crystal structure and magnetic properties of hexachlororhenates(IV) with aromatic amine cations. J Mol Struct 2002. [DOI: 10.1016/s0022-2860(02)00010-8] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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24
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Gardner JK, Pariyadath N, Corbin JL, Stiefel EI. Molybdenum and rhenium complexes of aromatic aminethiolate ligands. Inorg Chem 2002. [DOI: 10.1021/ic50182a021] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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26
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Chakravorti MC, Gangopadhyay T. Rhenium. Part XX. Synthesis and characterisation of oxopentakis(isothiocyanato)rhenate(V). Inorganica Chim Acta 1989. [DOI: 10.1016/s0020-1693(00)83130-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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27
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Fawdry RM, Gruenewald SM. Initial experience with Technegas--a new ventilation agent. AUSTRALASIAN RADIOLOGY 1988; 32:232-8. [PMID: 2847706 DOI: 10.1111/j.1440-1673.1988.tb02728.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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28
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29
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30
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Tedder DW. Some Preliminary Waste Management Considerations for Ground Processing Systems Supporting the Space Option. NUCL TECHNOL 1982. [DOI: 10.13182/nt82-a33054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- D. William Tedder
- Georgia Institute of Technology, School of Chemical Engineering, Atlanta, Georgia 30332
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