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Le TH, Nguyen H, Arnold HA, Darensbourg DJ, Darensbourg MY. Chirality-Guided Isomerization of Mn 2S 2 Diamond Core Complexes: A Mechanistic Study. Inorg Chem 2022; 61:16405-16413. [PMID: 36194618 DOI: 10.1021/acs.inorgchem.2c02460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Occasioned by the discovery of a ligand transfer from M(N2S2) to MnI in Mn(CO)5Br, the resulting H2N2S2 ligand-tethered dimanganese complex, (μ4-N,N'-ethylenebis(mercaptoacetamide))[Mn2(CO)6], was found to have myriad analogues of the type (μ-S-E)2[Mn2(CO)6], making up an under-studied class containing Mn2S2 rhombs. The attempt to synthesize a nontethered version resulted in a solid-state structure in an anti-conformation. However, a direct comparison of the Fourier-transform infrared spectra of the tethered versus nontethered complexes in combination with theoretical frequency calculation suggested the coexistence of syn- and anti-isomers and their interconversion in solution. Analysis of the syn- versus anti-version of the dimanganese components led to the understanding that whereas the anti-form exists as centrosymmetric RS isomers, the syn-form is restricted by C2 symmetry to be either RR or SS. Molecular scrambling experiments indicated monomeric, pentacoordinate, 16-e- (S-O)Mn(CO)3 intermediates with lifetimes sufficiently long to sample R and S monomers. Density functional theory analysis of the mechanistic pathway and a kinetic study corroborated that the proposed isomerization involves the cleavage and reformation of the dimeric structures.
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Affiliation(s)
- Trung H Le
- Department of Chemistry, Texas A&M University, College StationTexas77845, United States
| | - Hao Nguyen
- Department of Chemistry, Texas A&M University, College StationTexas77845, United States
| | - Heather A Arnold
- Department of Chemistry, Texas A&M University, College StationTexas77845, United States
| | - Donald J Darensbourg
- Department of Chemistry, Texas A&M University, College StationTexas77845, United States
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Watanabe LK, Ahmed ZS, Hayward JJ, Heyer E, Macdonald CLB, Rawson JM. Oxidative addition of 1,2,5,6-Tetrathiocins to Co(I): A Re-Examination of Crown Ether Functionalized Benzene Dithiolate Cobalt(III) Complexes. Organometallics 2022. [DOI: 10.1021/acs.organomet.1c00559] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lara K. Watanabe
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, N9B 3P4 Ontario, Canada
| | - Zeinab S. Ahmed
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, N9B 3P4 Ontario, Canada
| | - John J. Hayward
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, N9B 3P4 Ontario, Canada
| | - Elodie Heyer
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, N9B 3P4 Ontario, Canada
| | - Charles L. B. Macdonald
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, N9B 3P4 Ontario, Canada
- Department of Chemistry and Biochemistry, Carleton University, Ottawa, K1S 5B6 Ontario, Canada
| | - Jeremy M. Rawson
- Department of Chemistry and Biochemistry, University of Windsor, Windsor, N9B 3P4 Ontario, Canada
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Hogarth G, Al-Jibori SA, Al-Janabi A, Ghosh S, Basak-Modi S, Irzoqi AA, Wagner C, Al-Nassiry AI. Synthesis, structure and reactivity with phosphines of Hg(II) ortho-cyano-aminothiophenolate complexes formed via C-S bond cleavage and dehydrogenation of 2-aminobenzothiazoles. Dalton Trans 2022; 51:7889-7898. [DOI: 10.1039/d2dt00391k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Addition of 2-aminobenzothiazole (abt) and substituted derivatives to Hg(OAc)2 leads to the high yield formation of ortho-cyano-aminothiophenolate (ocap) complexes [Hg{SC6H3XN(C≡N)}]n (X = H, Me, Cl, Br, NO2) resulting from dehydrogenation...
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Mercury(II) mixed ligand complexes of phosphines or amines with 2-cyanoamino thiophenolate ligands formed via monodeprotonation and carbon–sulfur bond cleavage of 2-aminobenzothiazole. X-ray crystal structures of [Hg(SC6H4NCN)(PPh3)]2 and [Hg(SC6H4NCN)(Ph2PCH2PPh2)]2. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115349] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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5
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Saravanan R, Singh HB, Butcher RJ. Bis(2-nitrophenyl) selenide, bis(2-aminophenyl) selenide and bis(2-aminophenyl) telluride: structural and theoretical analysis. ACTA CRYSTALLOGRAPHICA SECTION C-STRUCTURAL CHEMISTRY 2021; 77:271-280. [PMID: 34089250 DOI: 10.1107/s2053229621005015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 05/11/2021] [Indexed: 11/10/2022]
Abstract
Three organoselenium and organotellurium compounds containing ortho substitutents, namely, bis(2-nitrophenyl) selenide, C12H8N2O4Se, 2, bis(2-aminophenyl) selenide, C12H12N2Se, 3, and bis(2-aminophenyl) telluride, C12H12N2Te, 7, have been investigated by both structural and theoretical methods. In the structures of all three compounds, there are intramolecular contacts between both Se and Te with the ortho substituents. In the case of 2, this is achieved by rotation of the nitro group from the arene plane. For 3, both amino groups exhibit pyramidal geometry and are involved in intramolecular N-H...Se interactions, with one also participating in intermolecular N-H...N hydrogen bonding. While 3 and 7 are structurally similar, there are some significant differences. In addition to both intramolecular N-H...Te interactions and intermolecular N-H...N hydrogen bonding, 7 also exhibits intramolecular N-H...N hydrogen bonding. In the packing of these molecules, for 2, there are weak intermolecular C-H...O contacts and these, along with the O...N interactions mentioned above, link the molecules into a three-dimensional array. For 3, in addition to the N-H...N and N-H...Se interactions, there are also weak intermolecular C-H...Se interactions, which also link the molecules into a three-dimensional array. On the other hand, 7 shows intermolecular N-H...N interactions linking the molecules into R22(16) centrosymmetric dimers. In the theoretical studies, for compound 2, AIM (atoms in molecules) analysis revealed critical points in the Se...O interactions with values of 0.017 and 0.026 a.u. These values are suggestive of weak interactions present between Se and O atoms. For 3 and 7, the molecular structures displayed intramolecular, as well as intermolecular, hydrogen-bond interactions of the N-H...N type. The strength of this hydrogen-bond interaction was calculated by AIM analysis. Here, the intermolecular (N-H...N) hydrogen bond is stronger than the intramolecular hydrogen bond. This was confirmed by the electron densities for 3 and 7 [ρ(r) = 0.015 and 0.011, respectively].
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Affiliation(s)
- Raju Saravanan
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
| | - Harkesh B Singh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
| | - Ray J Butcher
- Department of Chemistry, Howard University, 525 College Street NW, Washington, DC 20059, USA
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6
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Dias RDS, Cervo R, Siqueira FDS, Campos MMA, Lang ES, Tirloni B, Schumacher RF, Cargnelutti R. Synthesis and antimicrobial evaluation of coordination compounds containing 2,2′‐bis(3‐aminopyridyl) diselenide as ligand. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5750] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Renne de Sousa Dias
- Departamento de Química, Laboratório de Materiais InorgânicosUniversidade Federal de Santa Maria Santa Maria RS 97105–900 Brazil
| | - Rodrigo Cervo
- Departamento de Química, Laboratório de Materiais InorgânicosUniversidade Federal de Santa Maria Santa Maria RS 97105–900 Brazil
| | - Fallon dos Santos Siqueira
- Programa de Pós‐graduação em Ciências Farmacêuticas, Departamento de Análises Clínicas e ToxicológicasUniversidade Federal de Santa Maria Santa Maria RS 97105–900 Brazil
| | - Marli Matiko Anraku Campos
- Programa de Pós‐graduação em Ciências Farmacêuticas, Departamento de Análises Clínicas e ToxicológicasUniversidade Federal de Santa Maria Santa Maria RS 97105–900 Brazil
| | - Ernesto Schulz Lang
- Departamento de Química, Laboratório de Materiais InorgânicosUniversidade Federal de Santa Maria Santa Maria RS 97105–900 Brazil
| | - Bárbara Tirloni
- Departamento de Química, Laboratório de Materiais InorgânicosUniversidade Federal de Santa Maria Santa Maria RS 97105–900 Brazil
| | - Ricardo Frederico Schumacher
- Departamento de Química, Laboratório de Materiais InorgânicosUniversidade Federal de Santa Maria Santa Maria RS 97105–900 Brazil
| | - Roberta Cargnelutti
- Departamento de Química, Laboratório de Materiais InorgânicosUniversidade Federal de Santa Maria Santa Maria RS 97105–900 Brazil
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7
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Affiliation(s)
- Vishakha Kaim
- Department of Chemistry; University of Delhi; 110007 Delhi India
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Synthesis of five-coordinate manganese(I) carbonyl complex [(CO)3Mn (-S,-Se-C6H3-4-Me)]−: influences of non-innocent ligand to the structure, reactivity and electrochemical property. RESEARCH ON CHEMICAL INTERMEDIATES 2017. [DOI: 10.1007/s11164-016-2432-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Gennari M, Brazzolotto D, Yu S, Pécaut J, Philouze C, Rouzières M, Clérac R, Orio M, Duboc C. Effect of the Metal on Disulfide/Thiolate Interconversion: Manganese versus Cobalt. Chemistry 2015; 21:18770-8. [DOI: 10.1002/chem.201502996] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 10/02/2015] [Indexed: 11/05/2022]
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10
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Mathur P, Raghuvanshi A, Mobin SM. Reactivity of 1,2,3-triselena[3]ferrocenophane towards transition metal carbonyls. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.07.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Al-Jibori SA, Irzoqi AA, Al-Saraj EGH, Al-Janabi ASM, Basak-Modi S, Ghosh S, Merzweiler K, Wagner C, Schmidt H, Hogarth G. Formation of ortho-cyano-aminothiophenolate ligands with versatile binding modes via facile carbon-sulfur bond cleavage of 2-aminobenzothiazoles at mercury(II) centres. Dalton Trans 2015. [PMID: 26216202 DOI: 10.1039/c5dt02080h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Addition of 2-aminobenzothiazole and substituted derivatives to mercuric acetate in warm ethanol leads to the high yield formation of [Hg{SC6H3XN(C[triple bond, length as m-dash]N)}]n resulting from loss of hydrogen and sulfur-carbon bond cleavage. Addition of phosphines affords a series of complexes in which the new ortho-cyano-aminothiophenolate ligands adopt three different binding modes.
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Affiliation(s)
- Subhi A Al-Jibori
- Department of Chemistry, College of Science, University of Tikrit, Tikrit, Iraq.
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12
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Liu JJ, Lin YJ, Jin GX. A stepwise assembly of a molecular box from 16-electron half-sandwich precursors [Cp*M(pdt)] (M = Rh, Ir). Dalton Trans 2015; 44:10281-8. [DOI: 10.1039/c5dt01061f] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The coordinatively unsaturated 16-electron half-sandwich precursors [Cp*M(pdt)] (M = Rh and Ir, pdt = pyrazine-2,3-dithiol) have been synthesized. Their bridging and unsaturated attributes are further used in stepwise assembly reactions with binuclear blocks to give a closed molecular box.
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Affiliation(s)
- Jing-Jing Liu
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Material
- Department of Chemistry
- Fudan University
- Shanghai
- P. R. China
| | - Yue-Jian Lin
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Material
- Department of Chemistry
- Fudan University
- Shanghai
- P. R. China
| | - Guo-Xin Jin
- Shanghai Key Laboratory of Molecular Catalysis and Innovative Material
- Department of Chemistry
- Fudan University
- Shanghai
- P. R. China
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Pandey IK, Natarajan M, Kaur-Ghumaan S. Hydrogen generation: aromatic dithiolate-bridged metal carbonyl complexes as hydrogenase catalytic site models. J Inorg Biochem 2014; 143:88-110. [PMID: 25528677 DOI: 10.1016/j.jinorgbio.2014.11.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 11/26/2014] [Accepted: 11/26/2014] [Indexed: 10/24/2022]
Abstract
The design, syntheses and characteristics of metal carbonyl complexes with aromatic dithiolate linkers reported as bioinspired hydrogenase catalytic site models are described and reviewed. Among these the complexes capable of hydrogen generation have been discussed in detail. Comparisons have been made with carbonyl complexes having alkyl dithiolates as linkers between metal centers.
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Affiliation(s)
| | - Mookan Natarajan
- Department of Chemistry, University of Delhi, Delhi 110007, India
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14
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Teng Q, Huynh HV. Determining the Electron-Donating Properties of Bidentate Ligands by 13C NMR Spectroscopy. Inorg Chem 2014; 53:10964-73. [DOI: 10.1021/ic501325j] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Qiaoqiao Teng
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Republic of Singapore
| | - Han Vinh Huynh
- Department of Chemistry, National University of Singapore, 3 Science Drive 3, 117543, Republic of Singapore
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15
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Gennari M, Gerey B, Hall N, Pécaut J, Collomb MN, Rouzières M, Clérac R, Orio M, Duboc C. A Bio-Inspired Switch Based on Cobalt(II) Disulfide/Cobalt(III) Thiolate Interconversion. Angew Chem Int Ed Engl 2014; 53:5318-21. [DOI: 10.1002/anie.201402125] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Indexed: 11/08/2022]
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16
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Gennari M, Gerey B, Hall N, Pécaut J, Collomb MN, Rouzières M, Clérac R, Orio M, Duboc C. A Bio-Inspired Switch Based on Cobalt(II) Disulfide/Cobalt(III) Thiolate Interconversion. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402125] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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17
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Synthesis of mixed-valence trinuclear carbonylmanganese dithiolates: Promoting vacant coordination sites in tricarbonyl[(1-5-η)-pentadienyl]manganese. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2013.07.036] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Lumsden SEA, Durgaprasad G, Thomas Muthiah KA, Rose MJ. Tuning coordination modes of pyridine/thioether Schiff base (NNS) ligands to mononuclear manganese carbonyls. Dalton Trans 2014; 43:10725-38. [DOI: 10.1039/c4dt00600c] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Manganese carbonyls are ligated by pyridine/thioether Schiff base (NNS) ligands. Coordination of the thioether-S donor to the Mn(i) center is determined by subtle steric changes at the ligand periphery.
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Hou K, Fan WY. Electrocatalytic proton reduction catalyzed by a dimanganese disulfide carbonyl complex containing a redox-active internal disulfide bond. Dalton Trans 2014; 43:16977-80. [DOI: 10.1039/c4dt02361g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A dimanganese complex containing a redox-active elongated disulfide bond electrocatalyses proton reduction.
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Affiliation(s)
- Kaipeng Hou
- Department of Chemistry
- National University of Singapore
- 3 Science Drive 3, Singapore 117543
| | - Wai Yip Fan
- Department of Chemistry
- National University of Singapore
- 3 Science Drive 3, Singapore 117543
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Thomas AM, Lin BL, Wasinger EC, Stack TDP. Ligand noninnocence of thiolate/disulfide in dinuclear copper complexes: solvent-dependent redox isomerization and proton-coupled electron transfer. J Am Chem Soc 2013; 135:18912-9. [PMID: 24279864 DOI: 10.1021/ja409603m] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Copper thiolate/disulfide interconversions are related to the functions of several important proteins such as human Sco1, Cu-Zn superoxide dismutase (SOD1), and mammalian zinc-bonded metallothionein. The synthesis and characterization of well-defined synthetic analogues for such interconversions are challenging yet provide important insights into the mechanisms of such redox processes. Solvent-dependent redox isomerization and proton-coupled electron transfer mimicking these interconversions are observed in two structurally related dimeric μ,η(2):η(2)-thiolato Cu(II)Cu(II) complexes by various methods, including X-ray diffraction, XAS, NMR, and UV-vis. Spectroscopic evidence shows that a solvent-dependent equilibrium exists between the dimeric μ-thiolato Cu(II)Cu(II) state and its redox isomeric μ-disulfido Cu(I)Cu(I) form. Complete formation of μ-disulfido Cu(I)Cu(I) complexes, however, only occurs after the addition of 2 equiv of protons, which promote electron transfer from thiolate to Cu(II) and formation of disulfide and Cu(I) via protonation of the coordinating ligand. Proton removal reverses this reaction. The reported unusual reductive protonation/oxidative deprotonation of the metal centers may serve as a new chemical precedent for how related proteins manage Cu ions in living organisms.
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Affiliation(s)
- Andrew M Thomas
- Department of Chemistry, Stanford University , Stanford, California 94305, United States
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One-pot synthesis of sulphur bridged dinuclear rhenium metallacycles via addition of S–S bond across Re–Re bond. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2010.02.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Liddle BJ, Wanniarachchi S, Lindeman SV, Gardinier JR. Tricarbonylrhenium(I) and manganese(I) complexes of 2-(pyrazolyl)-4-toluidine. J Organomet Chem 2010. [DOI: 10.1016/j.jorganchem.2009.09.027] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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23
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Chan KW, Sau YK, Zhang QF, Wong WY, Williams ID, Leung WH. Synthesis, Structures, and Oxidation of Iridium(III) Alkyl Compounds Containing Thiolate and Dithiolate Ligands. Eur J Inorg Chem 2008. [DOI: 10.1002/ejic.200800460] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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24
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Reyes-Lezama M, Höpfl H, Zúñiga-Villarreal N. One pot synthesis of dimanganese carbonyl complexes containing sulfur and phosphorus donor ligands using tricarbonylpentadienylmanganese. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2007.12.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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25
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Hartl F, Rosa P, Ricard L, Le Floch P, Záliš S. Electronic transitions and bonding properties in a series of five-coordinate “16-electron” complexes [Mn(CO)3(L2)]− (L2=chelating redox-active π-donor ligand). Coord Chem Rev 2007. [DOI: 10.1016/j.ccr.2006.09.003] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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26
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Mundt O, Becker G, Baumgarten J, Riffel H, Simon A. Element-Element-Bindungen. XI Kettenbildung bei kristallinen Dimethyldichalkogenanen. Z Anorg Allg Chem 2006. [DOI: 10.1002/zaac.200600014] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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27
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Begum N, Hyder MI, Kabir SE, Hossain GMG, Nordlander E, Rokhsana D, Rosenberg E. Dithiolate Complexes of Manganese and Rhenium: X-ray Structure and Properties of an Unusual Mixed Valence Cluster Mn3(CO)6(μ-η2-SCH2CH2CH2S)3. Inorg Chem 2005; 44:9887-94. [PMID: 16363859 DOI: 10.1021/ic050987b] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Treatment of Mn(2)(CO)(10) with 3,4-toluenedithiol and 1,2-ethanedithiol in the presence of Me(3)NO.2H(2)O in CH(2)Cl(2) at room temperature afforded the dinuclear complexes Mn(2)(CO)(6)(mu-eta(4)-SC(6)H(3)(CH(3))S-SC(6)H(3)(CH(3))S) (1), and Mn(2)(CO)(6)(mu-eta(4)-SCH(2)CH(2)S-SCH(2)CH(2)S) (2), respectively. Similar reactions of Re(2)(CO)(10) with 3,4-toluenedithiol, 1,2-benzenedithiol, and 1,2-ethanedithiol yielded the dirhenium complexes Re(2)(CO)(6)(mu-eta(4)-SC(6)H(3)(CH(3))S-SC(6)H(3)(CH(3))S) (3), Re(2)(CO)(6)(mu-eta(4)-SC(6)H(4)S-SC(6)H(4)S) (4), and Re(2)(CO)(6)(SCH(2)CH(2)S-SCH(2)CH(2)S) (5), respectively. In contrast, treatment of Mn(2)(CO)(10) with 1,3-propanedithiol afforded the trimanganese compound Mn(3)(CO)(6)(mu-eta(2)-SCH(2)CH(2)CH(2)S)(3) (6), whereas Re(2)(CO)(10) gave only intractable materials. The molecular structures of 1, 3, and 6 have been determined by single-crystal X-ray diffraction studies. The dimanganese and dirhenium carbonyl compounds 1-5contain a binucleating disulfide ligand, formed by interligand disulfide bond formation between two dithiolate ligands identical in structure to that of the previously reported dimanganese complex Mn(2)(CO)(6)(mu-eta(4)-SC(6)H(4)S-SC(6)H(4)S). Complex 6, on the other hand, forms a unique example of a mixed-valence trimangenese carbonyl compound containing three bridging 1,3-propanedithiolate ligands. The solution properties of 6 have been investigated by UV-vis and EPR spectroscopies as well as electrochemical techniques.
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Affiliation(s)
- Noorjahan Begum
- Department of Chemistry, Jahangirnagar University, Savar, Dhaka-1342, Bangladesh
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Chen HW, Lin CW, Chen CC, Yang LB, Chiang MH, Liaw WF. Homodinuclear iron thiolate nitrosyl compounds [(ON)Fe(S,S-C6H4)2 Fe(NO)2]- and [(ON)Fe(SO2,S-C6H4)(S,S-C6H4)Fe(NO)2]- with {Fe(NO)}7-{Fe(NO)2}9 electronic coupling: new members of a class of dinitrosyl iron complexes. Inorg Chem 2005; 44:3226-32. [PMID: 15847431 DOI: 10.1021/ic049105j] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reaction of Fe(CO)2(NO)2 and [(ON)Fe(S,S-C6H3R)2]- (R = H (1), CH3 (1-Me))/[(ON)Fe(SO2,S-C6H4)(S,S-C6H4)]- (4) in THF afforded the diiron thiolate/sulfinate nitrosyl complexes [(ON)Fe(S,S-C6H3R)2 Fe(NO)2]- (R = H (2), CH3 (2-Me)) and [(ON)Fe(S,SO2-C6H4)(S,S-C6H4)Fe(NO)2]- (3), respectively. The average N-O bond lengths ([Fe(NO)2] unit) of 1.167(3) and 1.162(4) A in complexes 2 and 3 are consistent with the average N-O bond length of 1.165 A observed in the other structurally characterized dinitrosyl iron complexes with an {Fe(NO)2}9 core. The lower nu(15NO) value (1682 cm(-1) (KBr)) of the [(15NO)FeS4] fragment of [(15NO)Fe(S,S-C6H3CH3)2 Fe(NO)2]- (2-Me-15N), compared to that of [(15NO)Fe(S,S-C6H3CH3)2]- (1-Me-15N) (1727 cm(-1) (KBr)), implicates the electron transfer from {Fe(NO)2}10 Fe(CO)2(NO)2 to complex 1-Me/1 may occur in the process of formation of complex 2-Me/2. Then, the electronic structures of the [(NO)FeS4] and [S2Fe(NO)2] cores of complexes 2, 2-Me, and 3 were best assigned according to the Feltham-Enemark notation as the {Fe(NO)}7-{Fe(NO)2}9 coupling (antiferromagnetic interaction with a J value of -182 cm(-1) for complex 2) to account for the absence of paramagnetism (SQUID) and the EPR signal. On the basis of Fe-N(O) and N-O bond distances, the dinitrosyliron {L2Fe(NO)2} derivatives having an Fe-N(O) distance of approximately 1.670 A and a N-O distance of approximately 1.165 A are best assigned as {Fe(NO)2}9 electronic structures, whereas the Fe-N(O) distance of approximately 1.650 A and N-O distance of approximately 1.190 A probably imply an {Fe(NO)2}10 electronic structure.
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Affiliation(s)
- Hao-Wen Chen
- Department of Chemistry, National Tsing Hua University, Hsinchu 30043, Taiwan
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Hsieh CH, Hsu IJ, Lee CM, Ke SC, Wang TY, Lee GH, Wang Y, Chen JM, Lee JF, Liaw WF. Nickel complexes of o-amidochalcogenophenolate(2-)/o-iminochalcogenobenzosemiquinonate(1-) pi-radical: synthesis, structures, electron spin resonance, and x-ray absorption spectroscopic evidence. Inorg Chem 2003; 42:3925-33. [PMID: 12793831 DOI: 10.1021/ic034211r] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The preparation of complexes trans-[Ni(-SeC(6)H(4)-o-NH-)(2)](-) (1), cis-[Ni(-TeC(6)H(4)-o-NH-)(2)](-) (2), trans-[Ni(-SC(6)H(4)-o-NH-)(2)](-) (3), and [Ni(-SC(6)H(4)-o-S-)(2)](-) (4) by oxidative addition of 2-aminophenyl dichalcogenides to anionic [Ni(CO)(SePh)(3)](-) proves to be a successful approach in this direction. The cis arrangement of the two tellurium atoms in complex 2 is attributed to the intramolecular Te.Te contact interaction (Te.Te contact distance of 3.455 A). The UV-vis electronic spectra of complexes 1 and 2 exhibit an intense absorption at 936 and 942 nm, respectively, with extinction coefficient epsilon > 10000 L mol(-)(1) cm(-)(1). The observed small g anisotropy, the principal g values at g(1) = 2.036, g(2) = 2.062, and g(3) = 2.120 for 1 and g(1) = 2.021, g(2) = 2.119, and g(3) = 2.250 for 2, respectively, indicates the ligand radical character accompanied by the contribution of the singly occupied d orbital of Ni(III). The X-ray absorption spectra of all four complexes show L(III) peaks at approximately 854.5 and approximately 853.5 eV. This may indicate a variation of contribution of the Ni(II)-Ni(III) valence state. According to the DFT calculation, the unpaired electron of complex 1 and 2 is mainly distributed on the 3d(xz)() orbital of the nickel ion and on the 4p(z)() orbital of selenium (tellurium, 5p(z)()) as well as the 2p(z)() orbital of nitrogen of the ligand. On the basis of X-ray structural data, UV-vis absorption, electron spin resonance, magnetic properties, DFT computation, and X-ray absorption (K- and L-edge) spectroscopy, the monoanionic trans-[Ni(-SeC(6)H(4)-o-NH-)(2)](-) and cis-[Ni(-TeC(6)H(4)-o-NH-)(2)](-) complexes are appositely described as a resonance hybrid form of Ni(III)-bis(o-amidochalcogenophenolato(2-)) and Ni(II)-(o-amidochalcogenophenolato(2-))-(o-iminochalcogenobenzosemiquinonato(1-) pi-radical; i.e., complexes 1 and 2 contain delocalized oxidation levels of the nickel ion and ligands.
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Affiliation(s)
- Chung-Hung Hsieh
- Department of Chemistry, National Tsing Hua University, Hsinchu 30043, Taiwan
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Liaw WF, Hsieh CH, Peng SM, Lee GH. SS Bond-activation of diorganyl disulfide by anionic [Mn(CO)5]−: crystal structures of [MnII(SC5H4NO)3]− and [(CO)3Mn(μ-SR)3Co(μ-SR)3Mn(CO)3]− (R=C6H4NHCOPh). Inorganica Chim Acta 2002. [DOI: 10.1016/s0020-1693(02)00733-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Liaw WF, Lee JH, Gau HB, Chen CH, Jung SJ, Hung CH, Chen WY, Hu CH, Lee GH. Six-coordinate and five-coordinate Fe(II)(CN)(2)(CO)(x) thiolate complexes (x = 1, 2): synthetic advances for iron sites of [NiFe] hydrogenases. J Am Chem Soc 2002; 124:1680-8. [PMID: 11853444 DOI: 10.1021/ja011504f] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The dicyanodicarbonyliron(II) thiolate complexes trans,cis-[(CN)(2)(CO)(2)Fe(S,S-C-R)](-) (R = OEt (2), N(Et)(2) (3)) were prepared by the reaction of [Na][S-C(S)-R] and [Fe(CN)(2)(CO)(3)(Br)](-) (1). Complex 1 was obtained from oxidative addition of cyanogen bromide to [Fe(CN)(CO)(4)](-). In a similar fashion, reaction of complex 1 with [Na][S,O-C(5)H(4)N], and [Na][S,N-C(5)H(4)] produced the six-coordinate trans,cis-[(CN)(2)(CO)(2)Fe(S,O-C(5)H(4)N)](-) (6) and trans,cis-[(CN)(2)(CO)(2)Fe(S,N-C(5)H(4))](-) (7) individually. Photolysis of tetrahydrofuran (THF) solution of complexes 2, 3, and 7 under CO led to formation of the coordinatively unsaturated iron(II) dicyanocarbonyl thiolate compounds [(CN)(2)(CO)Fe(S,S-C-R)](-) (R = OEt (4), N(Et)(2) (5)) and [(CN)(2)(CO)Fe(S,N-C(5)H(4))](-) (8), respectively. The IR v(CN) stretching frequencies and patterns of complexes 4, 5, and 8 have unambiguously identified two CN(-) ligands occupying cis positions. In addition, density functional theory calculations suggest that the architecture of five-coordinate complexes 4, 5, and 8 with a vacant site trans to the CO ligand and two CN(-) ligands occupying cis positions serves as a conformational preference. Complexes 2, 3, and 7 were reobtained when the THF solution of complexes 4, 5, and 8 were exposed to CO atmosphere at 25 degrees C individually. Obviously, CO ligand can be reversibly bound to the Fe(II) site in these model compounds. Isotopic shift experiments demonstrated the lability of carbonyl ligands of complexes 2, 3, 4, 5, 7, and 8. Complexes [(CN)(2)(CO)Fe(S,S-C-R)](-) and NiA/NiC states [NiFe] hydrogenases from D. gigas exhibit a similar one-band pattern in the v(CO) region and two-band pattern in the v(CN) region individually, but in different positions, which may be accounted for by the distinct electronic effects between [S,S-C-R](-) and cysteine ligands. Also, the facile formations of five-coordinate complexes 4, 5, and 8 imply that the strong sigma-donor, weak pi-acceptor CN(-) ligands play a key role in creating/stabilizing five-coordinate iron(II) [(CN)(2)(CO)Fe(S,S-C-R)](-) complexes with a vacant coordination site trans to the CO ligand.
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Affiliation(s)
- Wen-Feng Liaw
- Department of Chemistry, National Changhua University of Education, Changhua 50058, Taiwan
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