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Shen K, Gennari M, Philouze C, Velić A, Demeshko S, Meyer F, Duboc C. Chromium-Thiolate Complex Undergoing C-S Bond Cleavage. Inorg Chem 2024; 63:9119-9128. [PMID: 38709854 DOI: 10.1021/acs.inorgchem.4c00402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
The cleavage of C-S bonds represents a crucial step in fossil fuel refinement to remove organosulfur impurities. Efforts are required to identify alternatives that can replace the energy-intensive hydrodesulfurization process currently in use. In this context, we have developed a series of bis-thiolato-ligated CrIII complexes supported by the L2- ligand (L2- = 2,2'-bipyridine-6,6'-diyl(bis(1,1-diphenylethanethiolate), one of them displaying desulfurization of one thiolate of the ligand under reducing and acidic conditions at ambient temperature and atmospheric pressure. While only 5-coordinated complexes were previously isolated by reaction of L2- with 3d metal MIII ions, both 5- and 6-coordinated mononuclear complexes have been obtained in the case of CrIII, viz., [CrIIILCl], [CrIIILCl2]-, and [CrIIILCl(CH3CN)]. The investigation of the reactivity of [CrIIILCl(CH3CN)] under reducing conditions led to a dinuclear [CrIII2L2(μ-Cl)(μ-OH)] compound and, in the presence of protons, to the mononuclear CrIII complex [CrIII(LN2S)2]+, where LN2S- is the partially desulfurized form of L2-. A desulfurization mechanism has been proposed involving the release of H2S, as evidenced experimentally.
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Affiliation(s)
- Kaiji Shen
- Univ. Grenoble Alpes, CNRS UMR 5250, DCM Grenoble F-38000, France
| | - Marcello Gennari
- Univ. Grenoble Alpes, CNRS UMR 5250, DCM Grenoble F-38000, France
| | | | - Ajdin Velić
- University of Göttingen, Institute of Inorganic Chemistry, Tammannstrasse 4, Göttingen D- 37077, Germany
| | - Serhiy Demeshko
- University of Göttingen, Institute of Inorganic Chemistry, Tammannstrasse 4, Göttingen D- 37077, Germany
| | - Franc Meyer
- University of Göttingen, Institute of Inorganic Chemistry, Tammannstrasse 4, Göttingen D- 37077, Germany
| | - Carole Duboc
- Univ. Grenoble Alpes, CNRS UMR 5250, DCM Grenoble F-38000, France
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He Y, Huang YY, Zhu XQ, Su SD, Xu QD, Fu JH, Song Y, Wu XT, Sheng TL. Electronic Transition and Magnetic Coupling Regulation in Trimetallic Complexes Featuring a New Bridging Ligand Obtained by Oxidative Addition. Inorg Chem 2023. [PMID: 37452753 DOI: 10.1021/acs.inorgchem.3c01339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/18/2023]
Abstract
A series of trimetallic complexes [FeIII(μ-L)(py)]2MII(py)n (n = 2, MII = MnII, 1; FeII, 2; CoII, 3; ZnII, 4; n = 3, MII = CdII, 5) with a new bridging ligand L4- (deprotonated 1,2-N1,N2-bis(2-mercaptoanil) oxalimidic acid) were synthesized and fully characterized by elemental analysis, single-crystal X-ray crystallography, IR, and Mössbauer spectra. Interestingly, the bridging ligand was obtained by oxidative addition of the (gma•)3- ligand from the mononuclear precursor Fe(gma)py (gma = glyoxal-bis(2-mercaptoanil)). In the obtained complexes, the bridging ligand L4- coordinates to the terminal FeIII ions (intermediate-spin with SFe = 3/2) by the N, S atoms, and coordinate to the central metal MII ion by the four O atoms. The resonance structure of the bridging ligand can be described as the two 4π-electron delocalized systems connected by one single-bond (C1-C2), which is different from the electronic structure of the precursor Fe(gma)py. Remarkably, the magnetic coupling interaction can be regulated through the central metal. The ferromagnetic coupling constant J gradually decreases as MII changes from FeII to CoII and MnII, while the paramagnetic behaviors are presented when MII = ZnII and CdII, confirmed by the magnetic susceptibility measurements and further supported by using the PHI program. Furthermore, the bridging ligand to the terminal FeIII charge transfer (LMCT) transitions emerged in all complexes but the central FeII to terminal FeIII charge transfer (MMCT) only presented in complex 2, strongly supported by the UV/vis-NIR electronic spectra and TDDFT calculations.
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Affiliation(s)
- Yong He
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Ying-Ying Huang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Xiao-Quan Zhu
- Department of Criminal Investigation, Fujian Police College, Fuzhou 350007, P. R. China
| | - Shao-Dong Su
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Qing-Dou Xu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Jin-Hui Fu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Ying Song
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Xin-Tao Wu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
| | - Tian-Lu Sheng
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, P. R. China
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Devkota L, SantaLucia DJ, Wheaton AM, Pienkos AJ, Lindeman SV, Krzystek J, Ozerov M, Berry JF, Telser J, Fiedler AT. Spectroscopic and Magnetic Studies of Co(II) Scorpionate Complexes: Is There a Halide Effect on Magnetic Anisotropy? Inorg Chem 2023; 62:5984-6002. [PMID: 37000941 DOI: 10.1021/acs.inorgchem.2c04468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
Abstract
The observation of single-molecule magnetism in transition-metal complexes relies on the phenomenon of zero-field splitting (ZFS), which arises from the interplay of spin-orbit coupling (SOC) with ligand-field-induced symmetry lowering. Previous studies have demonstrated that the magnitude of ZFS in complexes with 3d metal ions is sometimes enhanced through coordination with heavy halide ligands (Br and I) that possess large free-atom SOC constants. In this study, we systematically probe this "heavy-atom effect" in high-spin cobalt(II)-halide complexes supported by substituted hydrotris(pyrazol-1-yl)borate ligands (TptBu,Me and TpPh,Me). Two series of complexes were prepared: [CoIIX(TptBu,Me)] (1-X; X = F, Cl, Br, and I) and [CoIIX(TpPh,Me)(HpzPh,Me)] (2-X; X = Cl, Br, and I), where HpzPh,Me is a monodentate pyrazole ligand. Examination with dc magnetometry, high-frequency and -field electron paramagnetic resonance, and far-infrared magnetic spectroscopy yielded axial (D) and rhombic (E) ZFS parameters for each complex. With the exception of 1-F, complexes in the four-coordinate 1-X series exhibit positive D-values between 10 and 13 cm-1, with no dependence on halide size. The five-coordinate 2-X series exhibit large and negative D-values between -60 and -90 cm-1. Interpretation of the magnetic parameters with the aid of ligand-field theory and ab initio calculations elucidated the roles of molecular geometry, ligand-field effects, and metal-ligand covalency in controlling the magnitude of ZFS in cobalt-halide complexes.
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Gennari M, Duboc C. Bio-inspired, Multifunctional Metal-Thiolate Motif: From Electron Transfer to Sulfur Reactivity and Small-Molecule Activation. Acc Chem Res 2020; 53:2753-2761. [PMID: 33074643 DOI: 10.1021/acs.accounts.0c00555] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Sulfur-rich metalloproteins and metalloenzymes, containing strongly covalent metal-thiolate (cysteinate) or metal-sulfide bonds in their active site, are ubiquitous in nature. The metal-sulfur motif is a highly versatile tool involved in various biological processes: (i) metal storage, transport, and detoxification; (ii) electron transfer; (iii) activation of the sulfur atom to promote different types of S-based reactions including S-alkylation, S-oxygenation, S-nitrosylation, or disulfide or thiyl radicals formation; (iv) activation of small earth-abundant molecules (such as water, dioxygen, superoxide radical anion, carbon oxides, nitrous oxide, and dinitrogen).This Account describes our investigations carried out during the past 10 years on bio-inspired and biomimetic low-nuclearity complexes containing metal-thiolate bonds. The general objective of these structural, spectroscopic, electrochemical, and catalytic studies was to determine structure-properties-function correlations useful to (i) understanding the peculiar features or the mechanism of the mimicked natural systems and/or (ii) reproducing enzymatic reactivities for specific catalytic applications.By employing a unique highly preorganized N2S2-donor ligand with two thiolate functions, in combination with different first-row transition metals (Mn, Fe, Co, Ni, Cu, Zn, or V), we got access to a series of bio-inspired sulfur-rich complexes displaying a widespread spectrum of structures, properties, and functions. We isolated a dicopper(I) complex that, for the first time, mimicked concomitantly the key structural, spectroscopic, and redox features of the biological CuA center, a highly efficient electron transfer agent involved in the respiratory enzyme cytochrome c oxidase. In the field of sulfur activation, we explored (i) sulfur methylation promoted by a Zn-dithiolate complex that mimics Zn-dependent thiolate alkylation proteins and shows different selectivity compared to the Ni and Co congeners and (ii) a series of Co, Fe, and Mn complexes as the first copper-free systems able to promote thiolate/disulfide interconversion mediated by (de)coordination of halides. Concerning metal-centered reactivity, we investigated two families of metal-thiolate catalysts for small-molecule activation, especially relevant in the fields of sustainable fuel production and energy conversion: (i) two isostructural Mn and Fe dinuclear complexes that activate and reduce dioxygen selectively, either to hydrogen peroxide or water as a function of the experimental conditions; (ii) a family of dinuclear MFe (M = Ni or Fe) hydrogenase mimics active for catalytic H2 evolution both in organic solution and on modified electrodes in water.This Account thus illustrates how the versatility of thiolate ligation can support selected functions for transition metal complexes, depending on the nature of the metal, the nuclearity of the complex, the presence and type of co-ligands, the second coordination sphere effects, and the experimental conditions.
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Affiliation(s)
- Marcello Gennari
- UMR CNRS 5250, Département de Chimie Moléculaire, Univ. Grenoble Alpes, 38000 Grenoble, France
| | - Carole Duboc
- UMR CNRS 5250, Département de Chimie Moléculaire, Univ. Grenoble Alpes, 38000 Grenoble, France
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Viciano‐Chumillas M, Blondin G, Clémancey M, Krzystek J, Ozerov M, Armentano D, Schnegg A, Lohmiller T, Telser J, Lloret F, Cano J. Single‐Ion Magnetic Behaviour in an Iron(III) Porphyrin Complex: A Dichotomy Between High Spin and 5/2–3/2 Spin Admixture. Chemistry 2020; 26:14242-14251. [DOI: 10.1002/chem.202003052] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Indexed: 11/09/2022]
Affiliation(s)
| | - Geneviève Blondin
- CNRS, CEA, IRIG, CBM Université Grenoble Alpes, CEA-Grenoble 38000 Grenoble France
| | - Martin Clémancey
- CNRS, CEA, IRIG, CBM Université Grenoble Alpes, CEA-Grenoble 38000 Grenoble France
| | - Jurek Krzystek
- National High Magnetic Field Laboratory Florida State University Tallahassee FL 32310 USA
| | - Mykhaylo Ozerov
- National High Magnetic Field Laboratory Florida State University Tallahassee FL 32310 USA
| | - Donatella Armentano
- Dipartimento di Chimica e Tecnologie Chimiche (CTC) Università della Calabria 87030 Rende, Cosenza Italy
| | - Alexander Schnegg
- EPR Research Group MPI for Chemical Energy Conversion Stiftstrasse 34–36 45470 Mülheim Ruhr Germany
| | - Thomas Lohmiller
- EPR4Energy Joint Lab Department Spins in Energy Conversion and Quantum Information Science Helmholtz-Zentrum Berlin für Materialien und Energie Kekuléstrasse 5 12489 Berlin Germany
| | - Joshua Telser
- Department of Biological, Physical and Health Sciences Roosevelt University 430 S. Michigan Avenue Chicago IL 60605 USA
| | - Francesc Lloret
- Institut de Ciència Molecular (ICMol) Universitat de València 46980 Paterna Spain
| | - Joan Cano
- Institut de Ciència Molecular (ICMol) Universitat de València 46980 Paterna Spain
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Halcrow MA. Manipulating metal spin states for biomimetic, catalytic and molecular materials chemistry. Dalton Trans 2020; 49:15560-15567. [DOI: 10.1039/d0dt01919d] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The relationship between ligand design and spin state in base metal compounds is surveyed. Implications and applications of these principles for light-harvesting dyes, catalysis and materials chemistry are summarised.
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Coste SC, Pearson TJ, Freedman DE. Magnetic Anisotropy in Heterobimetallic Complexes. Inorg Chem 2019; 58:11893-11902. [DOI: 10.1021/acs.inorgchem.9b01459] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Scott C. Coste
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Tyler J. Pearson
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
| | - Danna E. Freedman
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, United States
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Wang L, Cantú Reinhard FG, Philouze C, Demeshko S, de Visser SP, Meyer F, Gennari M, Duboc C. Solvent‐ and Halide‐Induced (Inter)conversion between Iron(II)‐Disulfide and Iron(III)‐Thiolate Complexes. Chemistry 2018; 24:11973-11982. [DOI: 10.1002/chem.201801377] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2018] [Indexed: 02/01/2023]
Affiliation(s)
- Lianke Wang
- Université Grenoble AlpesUMR CNRS 5250Département de Chimie Moléculaire 38000 Grenoble France
| | - Fabián G. Cantú Reinhard
- Manchester Institute of BiotechnologySchool of Chemical Engineering and Analytical ScienceThe University of Manchester 131 Princess Street Manchester M1 7DN United Kingdom
| | - Christian Philouze
- Université Grenoble AlpesUMR CNRS 5250Département de Chimie Moléculaire 38000 Grenoble France
| | - Serhiy Demeshko
- Institut für Anorganische ChemieUniversität Göttingen Tammannstrasse 4 D-37077 Göttingen Germany
| | - Sam P. de Visser
- Manchester Institute of BiotechnologySchool of Chemical Engineering and Analytical ScienceThe University of Manchester 131 Princess Street Manchester M1 7DN United Kingdom
| | - Franc Meyer
- Institut für Anorganische ChemieUniversität Göttingen Tammannstrasse 4 D-37077 Göttingen Germany
| | - Marcello Gennari
- Université Grenoble AlpesUMR CNRS 5250Département de Chimie Moléculaire 38000 Grenoble France
| | - Carole Duboc
- Université Grenoble AlpesUMR CNRS 5250Département de Chimie Moléculaire 38000 Grenoble France
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Wang L, Zlatar M, Vlahović F, Demeshko S, Philouze C, Molton F, Gennari M, Meyer F, Duboc C, Gruden M. Experimental and Theoretical Identification of the Origin of Magnetic Anisotropy in Intermediate Spin Iron(III) Complexes. Chemistry 2018; 24:5091-5094. [PMID: 29447424 PMCID: PMC5969241 DOI: 10.1002/chem.201705989] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Indexed: 11/24/2022]
Abstract
The complexes [FeLN2S2X] [in which LN2S2=2,2′‐(2,2′‐bipryridine‐6,6′‐diyl)bis(1,1′‐diphenylethanethiolate) and X=Cl, Br and I], characterized crystallographically earlier and here (Fe(L)Br), reveal a square pyramidal coordinated FeIII ion. Unusually, all three complexes have intermediate spin ground states. Susceptibility measurements, powder cw X‐ and Q‐band EPR spectra, and zero‐field powder Mössbauer spectra show that all complexes display distinct magnetic anisotropy, which has been rationalized by DFT calculations.
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Affiliation(s)
- Lianke Wang
- University of Grenoble Alpes, DCM, CNRS UMR 5250, Grenoble, France
| | - Matija Zlatar
- Institute of Chemistry, Technology and Metallurgy, University of Belgrade, Serbia
| | - Filip Vlahović
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000, Belgrade, Serbia
| | - Serhiy Demeshko
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstr. 4, 37077, Göttingen, Germany
| | | | - Florian Molton
- University of Grenoble Alpes, DCM, CNRS UMR 5250, Grenoble, France
| | - Marcello Gennari
- University of Grenoble Alpes, DCM, CNRS UMR 5250, Grenoble, France
| | - Franc Meyer
- Institut für Anorganische Chemie, Universität Göttingen, Tammannstr. 4, 37077, Göttingen, Germany
| | - Carole Duboc
- University of Grenoble Alpes, DCM, CNRS UMR 5250, Grenoble, France
| | - Maja Gruden
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, 11000, Belgrade, Serbia
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