1
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Mena MR, Bhunia M, Gau MR, Mindiola DJ. Molecular Bis(chalcogenido) Titanates of Te, Se, and S. Inorg Chem 2024; 63:18495-18501. [PMID: 39271477 DOI: 10.1021/acs.inorgchem.4c03060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/15/2024]
Abstract
A series of titanate cisoid bis(chalcogenidos) (Ch = Te, Se, and S) complexes supported by the β-diketiminate ligand BDI- = [ArNC(CH3)]2CH (Ar = 2,6-iPr2C6H3) are readily assembled via treatment of the TiIII precursor (BDI)Ti(CH2SiMe3)2 with 2.5 equiv of elemental "Ch" source and 1 equiv of reductant in the presence of crown-ether. In the absence of the electride, Te or S addition to (BDI)Ti(CH2SiMe3)2 results instead in the isolation of a mononuclear tellurido-tellurolate [(BDI)Ti(=Te)(TeCH2SiMe3)] and the bridging sulfido-thiolate complex [(BDI)Ti(SCH2SiMe3)(μ-S)]2, respectively. In the case of Se, the rare selenido-perselenoate complex [(BDI)Ti(=Se)(η2-SeSeCH2SiMe3)] was isolated. In addition to crystallographically and spectroscopically characterizing all of the complexes, we demonstrate the latter species to be likely intermediates in the formation of [(BDI)Ti(Ch)2]- via the addition of electride.
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Affiliation(s)
- Matthew R Mena
- Department of Chemistry, University of Pennsylvania, 231 S 34th St, Philadelphia, Pennsylvania, 19104 United States
| | - Mrinal Bhunia
- Department of Chemistry, University of Pennsylvania, 231 S 34th St, Philadelphia, Pennsylvania, 19104 United States
| | - Michael R Gau
- Department of Chemistry, University of Pennsylvania, 231 S 34th St, Philadelphia, Pennsylvania, 19104 United States
| | - Daniel J Mindiola
- Department of Chemistry, University of Pennsylvania, 231 S 34th St, Philadelphia, Pennsylvania, 19104 United States
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2
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Kaluarachchige Don UI, Palmer Z, Ward CL, Lord RL, Groysman S. Combining [Mo VIO 3] and [M 0(CO) 3] (M = Mo, Cr) Fragments within the Same Complex: Synthesis and Reactivity of the Single Oxo-Bridged Heterobimetallics Supported by Xanthene-Based Heterodinucleating Ligands. Inorg Chem 2023; 62:15063-15075. [PMID: 37677846 DOI: 10.1021/acs.inorgchem.3c01929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/09/2023]
Abstract
A functional model of Mo-Cu carbon monoxide dehydrogenase (CODH) enzyme requires the presence of an oxidant (metal-oxo) and a metal-bound carbonyl in close proximity. In this work, we report the synthesis, characterization, and reactivity of a heterobimetallic complex combining Mo(VI) trioxo with Mo(0) tricarbonyl. The formation of the heterobimetallic complex is facilitated by the xanthene-bridged heterodinucleating ligand containing a hard catecholate chelate and a soft iminopyridine chelate. A catechol-coordinated square-pyramidal [MoVIO3] fragment interacts directly with the iminopyridine-bound [Mo0(CO)3] fragment via a single (oxo) bridge, with the overall disposition being related to the proposed first step in the CODH mechanism, where square-pyramidal [MoVIO2S] interacts with the [Cu-CO] via a single sulfido bridge. Our attempt to obtain a sulfido-bridged analogue (using [MoO3S]2- precursor) led to a mixture of products possibly containing different (oxo and sulfido) bridges. Despite a direct interaction between Mo(VI) and Mo(0) segments, no internal redox is observed, with the high lying occupied MOs being mostly d-π orbitals at Mo0(CO)3 and the low lying unoccupied MOs being d-π orbitals at MoVIO3. Due to the overall rigid structure, the heterobimetallic complex was found to be stable up to 100 °C in DMF-d7 (based on 1H NMR). The decomposition of the complex above this temperature does not produce CO2 (based on gas chromatography), dissociating stable Mo(CO)3(DMF)3 instead (based on IR). We also synthesized and studied the reactivity of the Mo(VI)/Cr(0) analogue. While this complex demonstrated more facile decomposition, no CO2 production was observed. Density functional theory calculations suggest that the formation of [CO2]2- and its subsequent reductive elimination is endergonic in the present system, likely due to the stability of fac-Mo0(CO)3 and the relative nucleophilic character of the carbonyl carbon engendered by back donation from Mo(0). The calculations also indicate that the replacement of one oxo by sulfido (both terminal and bridging), replacement of catechol with dithiolene, and replacement of Mo(0) with Cr(0) does not affect significantly the energetics of the process, likely requiring the use a less stable and less π-basic CO anchor.
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Affiliation(s)
| | - Zsolt Palmer
- Department of Chemistry, Grand Valley State University, 1 Campus Drive, Allendale, Michigan 49401, United States
| | - Cassandra L Ward
- Lumigen Instrument Center, Wayne State University, 5101 Cass Avenue, Detroit, Michigan 48202, United States
| | - Richard L Lord
- Department of Chemistry, Grand Valley State University, 1 Campus Drive, Allendale, Michigan 49401, United States
| | - Stanislav Groysman
- Department of Chemistry, Wayne State University, 5101 Cass Ave. Detroit, Michigan 48202, United States
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3
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Kaluarachchige Don UI, Almaat AS, Ward CL, Groysman S. Studies Relevant to the Functional Model of Mo-Cu CODH: In Situ Reactions of Cu(I)-L Complexes with Mo(VI) and Synthesis of Stable Structurally Characterized Heterotetranuclear Mo VI2Cu I2 Complex. Molecules 2023; 28:molecules28083644. [PMID: 37110878 PMCID: PMC10143188 DOI: 10.3390/molecules28083644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 04/17/2023] [Accepted: 04/19/2023] [Indexed: 04/29/2023] Open
Abstract
In this study, we report the synthesis, characterization, and reactions of Cu(I) complexes of the general form Cu(L)(LigH2) (LigH2 = xanthene-based heterodinucleating ligand (E)-3-(((5-(bis(pyridin-2-ylmethyl)amino)-2,7-di-tert-butyl-9,9-dimethyl-9H-xanthen-4-yl)imino)methyl)benzene-1,2-diol); L = PMe3, PPh3, CN(2,6-Me2C6H3)). New complexes [Cu(PMe3)(LigH2)] and [CuCN(2,6-Me2C6H3)(LigH2)] were synthesized by treating [Cu(LigH2)](PF6) with trimethylphosphine and 2,6-dimethylphenyl isocyanide, respectively. These complexes were characterized by multinuclear NMR spectroscopy, IR spectroscopy, high-resolution mass spectrometry (HRMS), and X-ray crystallography. In contrast, attempted reactions of [Cu(LigH2)](PF6) with cyanide or styrene failed to produce isolable crystalline products. Next, the reactivity of these and previously synthesized Cu(I) phosphine and isocyanide complexes with molybdate was interrogated. IR (for isocyanide) and 31P NMR (for PPh3/PMe3) spectroscopy demonstrates the lack of oxidation reactivity. We also describe herein the first example of a structurally characterized multinuclear complex combining both Mo(VI) and Cu(I) metal ions within the same system. The heterobimetallic tetranuclear complex [Cu2Mo2O4(μ2-O)(Lig)2]·HOSiPh3 was obtained by the reaction of the silylated Mo(VI) precursor (Et4N)(MoO3(OSiPh3)) with LigH2, followed by the addition of [Cu(NCMe)4](PF6). This complex was characterized by NMR spectroscopy, high-resolution mass spectrometry, and X-ray crystallography.
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Affiliation(s)
| | - Ahmad S Almaat
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, MI 48202, USA
| | - Cassandra L Ward
- Lumigen Instrument Center, Wayne State University, 5101 Cass Avenue, Detroit, MI 48202, USA
| | - Stanislav Groysman
- Department of Chemistry, Wayne State University, 5101 Cass Avenue, Detroit, MI 48202, USA
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4
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Reactions of a Dioxidomolybdenum(VI) Complex with Thionation Reagents—Formation of Mo(IV) Species with Sulfur Donors. Molecules 2022; 27:molecules27217154. [PMID: 36363980 PMCID: PMC9655758 DOI: 10.3390/molecules27217154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 10/18/2022] [Accepted: 10/21/2022] [Indexed: 11/05/2022] Open
Abstract
Molecular molybdenum complexes with sulfur donor ligands are generally studied as soluble model compounds for molybdenum enzymes essential for life. The dioxidomolybdenum(VI) complex with tetradentate aminobisphenolate ligand undergoes a reaction with thionation reagent P2S5 or its organic derivative, Lawesson’s reagent, to yield stable Mo(IV) aminobisphenolate complexes, where pristine oxido ligands have been replaced by bidentate sulfur donors tetrasulfide, S42− or (4-methoxyphenyl)phosphonotrithioate residue derived from Lawesson’s reagent. This is in contrast to the behaviour of analogous dioxidotungsten(VI) complex, which, under similar conditions, yields W(VI) S2 systems. The overall cis,trans,cis geometry of the parent dioxidomolybdenum(VI) aminobisphenolate is retained, namely, the neutral nitrogen donors are in cis positions, phenolate oxygens are trans to each other and sulfur donors are cis. Although formally Mo(IV), thus d2 system, the studied complexes have diamagnetic singlet electron configurations as a result of the axially compressed octahedral structures.
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5
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Probst C, Yang J, Krausze J, Hercher TW, Richers CP, Spatzal T, Kc K, Giles LJ, Rees DC, Mendel RR, Kirk ML, Kruse T. Mechanism of molybdate insertion into pterin-based molybdenum cofactors. Nat Chem 2021; 13:758-765. [PMID: 34183818 PMCID: PMC8325642 DOI: 10.1038/s41557-021-00714-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Accepted: 04/27/2021] [Indexed: 02/06/2023]
Abstract
The molybdenum cofactor (Moco) is found in the active site of numerous important enzymes that are critical to biological processes. The bidentate ligand that chelates molybdenum in Moco is the pyranopterin dithiolene (molybdopterin, MPT). However, neither the mechanism of molybdate insertion into MPT nor the structure of Moco prior to its insertion into pyranopterin molybdenum enzymes is known. Here, we report this final maturation step, where adenylated MPT (MPT-AMP) and molybdate are the substrates. X-ray crystallography of the Arabidopsis thaliana Mo-insertase variant Cnx1E S269D D274S identified adenylated Moco (Moco-AMP) as an unexpected intermediate in this reaction sequence. X-ray absorption spectroscopy revealed the first coordination sphere geometry of Moco trapped in the Cnx1E active site. We have used this structural information to deduce a mechanism for molybdate insertion into MPT-AMP. Given their high degree of structural and sequence similarity, we suggest that this mechanism is employed by all eukaryotic Mo-insertases.
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Affiliation(s)
- Corinna Probst
- Institute of Plant Biology, Technische Universität Braunschweig, Braunschweig, Germany
| | - Jing Yang
- Department of Chemistry and Chemical Biology, The University of New Mexico, Albuquerque, NM, USA
| | - Joern Krausze
- Institute of Plant Biology, Technische Universität Braunschweig, Braunschweig, Germany
| | - Thomas W Hercher
- Institute of Plant Biology, Technische Universität Braunschweig, Braunschweig, Germany
| | - Casseday P Richers
- Department of Chemistry and Chemical Biology, The University of New Mexico, Albuquerque, NM, USA
| | - Thomas Spatzal
- Division of Chemistry and Chemical Engineering, Howard Hughes Medical Institute, California Institute of Technology, Pasadena, CA, USA
| | - Khadanand Kc
- Department of Chemistry and Chemical Biology, The University of New Mexico, Albuquerque, NM, USA
| | - Logan J Giles
- Department of Chemistry and Chemical Biology, The University of New Mexico, Albuquerque, NM, USA
| | - Douglas C Rees
- Division of Chemistry and Chemical Engineering, Howard Hughes Medical Institute, California Institute of Technology, Pasadena, CA, USA
| | - Ralf R Mendel
- Institute of Plant Biology, Technische Universität Braunschweig, Braunschweig, Germany
| | - Martin L Kirk
- Department of Chemistry and Chemical Biology, The University of New Mexico, Albuquerque, NM, USA.
| | - Tobias Kruse
- Institute of Plant Biology, Technische Universität Braunschweig, Braunschweig, Germany.
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6
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Zwettler N, Walg SP, Belaj F, Mösch‐Zanetti NC. Heterolytic Si-H Bond Cleavage at a Molybdenum-Oxido-Based Lewis Pair. Chemistry 2018; 24:7149-7160. [PMID: 29521459 PMCID: PMC6001527 DOI: 10.1002/chem.201800226] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Indexed: 12/15/2022]
Abstract
The reaction of a molybdenum(VI) oxido imido complex with the strong Lewis acid B(C6 F5 )3 gave access to the Lewis adduct [Mo{OB(C6 F5 )3 }(NtBu)L2 ] featuring reversible B-O bonding in solution. The resulting frustrated Lewis pair (FLP)-like reactivity is reflected by the compound's ability to heterolytically cleave Si-H bonds, leading to a clean formation of the novel cationic MoVI species 3 a (R=Et) and 3 b (R=Ph) of the general formula [Mo(OSiR3 )(NtBu)L2 ][HB(C6 F5 )3 ]. These compounds possess properties highly unusual for molybdenum d0 species such as an intensive, charge-transfer-based color as well as a reversible redox couple at very low potentials, both dependent on the silane used. Single-crystal X-ray diffraction analyses of 2 and 4 b, a derivative of 3 b featuring the [FB(C6 F5 )3 ]- anion, picture the stepwise elongation of the Mo=O bond, leading to a large increase in the electrophilicity of the metal center. The reaction of 3 a and 3 b with benzaldehyde allowed for the regeneration of compound 2 by hydrosilylation of the benzaldehyde. NMR spectroscopy suggested an unusual mechanism for the transformation, involving a substrate insertion in the B-H bond of the borohydride anion.
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Affiliation(s)
- Niklas Zwettler
- Institute of Chemistry, Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Simon P. Walg
- Institute of Chemistry, Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Ferdinand Belaj
- Institute of Chemistry, Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
| | - Nadia C. Mösch‐Zanetti
- Institute of Chemistry, Inorganic ChemistryUniversity of GrazSchubertstrasse 18010GrazAustria
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7
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New synthetic approach towards well-defined silica supported tungsten bis-oxo, active catalysts for olefin metathesis. CATAL COMMUN 2018. [DOI: 10.1016/j.catcom.2018.01.031] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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8
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Hollingsworth TS, Hollingsworth RL, Lord RL, Groysman S. Cooperative bimetallic reactivity of a heterodinuclear molybdenum–copper model of Mo–Cu CODH. Dalton Trans 2018; 47:10017-10024. [DOI: 10.1039/c8dt02323a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Modeling the reactivity of Mo–Cu CODH: Cu(i) brings the substrate close to Mo–oxo and develops electrophilic character in CO carbon.
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Affiliation(s)
| | | | - Richard L. Lord
- Department of Chemistry
- Grand Valley State University
- Allendale
- USA
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9
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Arias-Ugarte RN, Sharma HK, Pannell KH. Amide (A)-thioamide (T) interconversions using Ph3SiSH (A to T) and Ph3SnOH (T to A) reagents. Appl Organomet Chem 2016. [DOI: 10.1002/aoc.3462] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Renzo N Arias-Ugarte
- Department of Chemistry; University of Texas at El Paso; El Paso TX 79968-0513 USA
| | - Hemant K Sharma
- Department of Chemistry; University of Texas at El Paso; El Paso TX 79968-0513 USA
| | - Keith H Pannell
- Department of Chemistry; University of Texas at El Paso; El Paso TX 79968-0513 USA
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10
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Salojärvi E, Peuronen A, Sillanpää R, Damlin P, Kivelä H, Lehtonen A. Aminobisphenolate supported tungsten disulphido and dithiolene complexes. Dalton Trans 2016; 44:9409-16. [PMID: 25914124 DOI: 10.1039/c5dt00995b] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Dioxotungsten(vi) complexes with tetradentate amino bisphenolates were converted into the corresponding Cs-symmetric amino bisphenolate disulphido complexes by a reaction with either Lawesson's reagent or P2S5. Further reaction with diethyl acetylenedicarboxylate leads to the formation of diamagnetic tungsten(iv) dithiolene compounds. The syntheses, crystal structures, spectroscopic and electrochemical characterization of such disulphido and dithiolene complexes are presented.
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Affiliation(s)
- E Salojärvi
- Laboratory of Materials Chemistry and Chemical Analysis, Department of Chemistry, University of Turku, FI-20014, Turku, Finland.
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11
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Matsushita O, Derkacheva VM, Muranaka A, Shimizu S, Uchiyama M, Luk’yanets EA, Kobayashi N. Rectangular-Shaped Expanded Phthalocyanines with Two Central Metal Atoms. J Am Chem Soc 2012; 134:3411-8. [DOI: 10.1021/ja209589x] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Osamu Matsushita
- Department of Chemistry, Graduate
School of Science, Tohoku University, Sendai
980-8578, Japan
| | | | - Atsuya Muranaka
- Advanced Elements
Chemistry Research
Team, ASI, RIKEN, Wako 351-0198, Japan
- PRESTO, Japan Science and Technology Agency (JST), Saitama 332-0012, Japan
| | - Soji Shimizu
- Department of Chemistry, Graduate
School of Science, Tohoku University, Sendai
980-8578, Japan
| | - Masanobu Uchiyama
- Advanced Elements
Chemistry Research
Team, ASI, RIKEN, Wako 351-0198, Japan
- Graduate School of Pharmaceutical
Sciences, The University of Tokyo, Bunkyo-ku,
Tokyo 113-0033, Japan
| | - Evgeny A. Luk’yanets
- Organic Intermediates and Dyes Institute, B. Sadovaya 1/4, Moscow 123995,
Russia
| | - Nagao Kobayashi
- Department of Chemistry, Graduate
School of Science, Tohoku University, Sendai
980-8578, Japan
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12
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Holm RH, Solomon EI, Majumdar A, Tenderholt A. Comparative molecular chemistry of molybdenum and tungsten and its relation to hydroxylase and oxotransferase enzymes. Coord Chem Rev 2011. [DOI: 10.1016/j.ccr.2010.10.017] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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13
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Coelho AC, Nolasco M, Balula SS, Antunes MM, Pereira CCL, Almeida Paz FA, Valente AA, Pillinger M, Ribeiro-Claro P, Klinowski J, Gonçalves IS. Chemistry and Catalytic Activity of Molybdenum(VI)-Pyrazolylpyridine Complexes in Olefin Epoxidation. Crystal Structures of Monomeric Dioxo, Dioxo-μ-oxo, and Oxodiperoxo Derivatives. Inorg Chem 2010; 50:525-38. [DOI: 10.1021/ic101384p] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ana C. Coelho
- Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Mariela Nolasco
- Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Salete S. Balula
- Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
- REQUIMTE/Department of Chemistry and Biochemistry, Faculty of Science, University of Porto, 4169-007 Porto, Portugal
| | - Margarida M. Antunes
- Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Cláudia C. L. Pereira
- Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
- Unit of Chemical and Radiopharmaceutical Sciences (UCRS), Nuclear and Technological Institute, Estrada Nacional 10, 2686-953 Sacavém, Portugal
| | | | - Anabela A. Valente
- Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Martyn Pillinger
- Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Paulo Ribeiro-Claro
- Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Jacek Klinowski
- Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, U.K
| | - Isabel S. Gonçalves
- Department of Chemistry, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal
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14
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Sugimoto H, Tatemoto S, Suyama K, Miyake H, Itoh S, Dong C, Yang J, Kirk ML. Dioxomolybdenum(VI) complexes with ene-1,2-dithiolate ligands: synthesis, spectroscopy, and oxygen atom transfer reactivity. Inorg Chem 2010; 48:10581-90. [PMID: 19831360 DOI: 10.1021/ic901112s] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
New dioxomolybdenum(VI) complexes, (Et(4)N)(Ph(4)P)[Mo(VI)O(2)(S(2)C(2)(CO(2)Me)(2))(bdt)] (2) and (Et(4)N)(Ph(4)P)[Mo(VI)O(2)(S(2)C(2)(CO(2)Me)(2))(bdtCl(2))](4)(S(2)C(2)(CO(2)Me)(2) = 1,2-dicarbomethoxyethylene-1,2-ditholate, bdt = 1,2-benzenedithiolate, bdtCl(2) = 3,6-dichloro-1,2-benzenedithiolate), that possess at least one ene-1,2-dithiolate ligand were synthesized by the reaction of their mono-oxo-molybdenum(IV) derivatives, (Et(4)N)(2)[Mo(IV)O(S(2)C(2)(CO(2)Me)(2))(bdt)] (1) and (Et(4)N)(2)[Mo(IV)O(S(2)C(2)(CO(2)Me)(2))(bdtCl(2))] (3), with Me(3)NO. Additionally, the bis(ene-1,2-dithiolate)Mo(VI)O(2) complex, (Et(4)N)(Ph(4)P)[Mo(VI)O(2)(S(2)C(2)(CO(2)Me)(2))(2)] (6), was isolated. Complexes 2, 4, and 6 were characterized by elemental analysis, negative-ion ESI mass spectrometry, and IR spectroscopy. X-ray analysis of 4 and 6 revealed a Mo(VI) center that adopts a distorted octahedral geometry. Variable-temperature (1)H NMR spectra of (CD(3))(2)CO solutions of the Mo(VI)O(2) complexes indicated that the Mo centers isomerize between Delta and Lambda forms. The electronic structures of 2, 4, and 6 have been investigated by electronic absorption and resonance Raman spectroscopy and bonding calculations. The results indicate very similar electronic structures for the complexes and considerable pi-delocalization between the Mo(VI)O(2) and ene-1,2-dithiolate units. The similar oxygen atom transfer kinetics for the complexes results from their similar electronic structures.
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Affiliation(s)
- Hideki Sugimoto
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan.
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15
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Groysman S, Majumdar A, Zheng SL, Holm RH. Reactions of Monodithiolene Tungsten(VI) Sulfido Complexes with Copper(I) in Relation to the Structure of the Active Site of Carbon Monoxide Dehydrogenase. Inorg Chem 2009; 49:1082-9. [DOI: 10.1021/ic902066m] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Stanislav Groysman
- Department of Chemisty and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138
| | - Amit Majumdar
- Department of Chemisty and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138
| | - Shao-Liang Zheng
- Department of Chemisty and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138
| | - R. H. Holm
- Department of Chemisty and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138
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16
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Groysman S, Holm RH. A series of mononuclear quasi-two-coordinate copper(I) complexes employing a sterically demanding thiolate ligand. Inorg Chem 2009; 48:621-7. [PMID: 19138143 DOI: 10.1021/ic801836k] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of two-coordinate thiolate complexes [Cu(SAr*)L] was synthesized as possible reactants in forming analogues of the active site of Mo/Cu-containing carbon monoxide dehydrogenase. Complexes with L = PPh(3) (1), 2,6-lutidine (2), and the N-heterocyclic carbene Pr(i)(2)NHCMe(2) (3) have been prepared by the reaction of [CuCl(PPh(3))(3)] (1) or [CuBr(SMe(2))] (2, 3) with ligand L and the exceptionally sterically encumbered ligand Ar*S = 2,6-bis(2,4,6-triisopropylphenyl)benzenethiolate(1-). The reaction of [CuBr(SMe(2))] with the thiolate in the absence of added L afforded trinuclear [Cu(3)(SAr*)(2)Br] (7). The carbene complex (3) undergoes Cu-C bond insertion with sulfur to form the thiourea complex [Cu(SAr*)(Pr(i)(2)Me(2)ImS)] (4). The complexes [Cu(Ar*)L] with L = tetrahydrothiophene (5) and 2,6-lutidine (6) were obtained by reaction of Ar*Li(OEt(2)) with CuBr/L. These species did not undergo clean Cu-C bond insertion with sulfur transfer agents; the disulfide Ar*SSCH(2)Ph (9) was isolated from the reaction of 6 with (PhCH(2)S)(2)S. The structures of all complexes and 9 were determined. Whereas 5 and 6 are strictly two-coordinate with linear C-Cu-L angles, 1-4 are quasi-two-coordinate because of weak 3d-C(ppi) interactions with a phenyl group, leading to nonlinear structures (S-Cu-L = 135-164 degrees).
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Affiliation(s)
- Stanislav Groysman
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA
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Sugimoto H, Suyama K, Sugimoto K, Miyake H, Takahashi I, Hirota S, Itoh S. A New Class of Sulfido/Oxo(dithiolene)−Molybdenum(IV) Complexes Derived from Sulfido/Oxo-Bis(tetrasulfido)molybdenum(IV) Anions. Inorg Chem 2008; 47:10150-7. [DOI: 10.1021/ic800832a] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hideki Sugimoto
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan, Rigaku Corporation, Akishima, Tokyo 196-8666, Japan, and Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, 630-0192 Japan
| | - Koichiro Suyama
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan, Rigaku Corporation, Akishima, Tokyo 196-8666, Japan, and Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, 630-0192 Japan
| | - Kunihisa Sugimoto
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan, Rigaku Corporation, Akishima, Tokyo 196-8666, Japan, and Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, 630-0192 Japan
| | - Hiroyuki Miyake
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan, Rigaku Corporation, Akishima, Tokyo 196-8666, Japan, and Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, 630-0192 Japan
| | - Isao Takahashi
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan, Rigaku Corporation, Akishima, Tokyo 196-8666, Japan, and Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, 630-0192 Japan
| | - Shun Hirota
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan, Rigaku Corporation, Akishima, Tokyo 196-8666, Japan, and Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, 630-0192 Japan
| | - Shinobu Itoh
- Department of Chemistry, Graduate School of Science, Osaka City University, Sumiyoshi-ku, Osaka 558-8585, Japan, Rigaku Corporation, Akishima, Tokyo 196-8666, Japan, and Graduate School of Materials Science, Nara Institute of Science and Technology, Ikoma, 630-0192 Japan
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Groysman S, Wang JJ, Tagore R, Lee SC, Holm RH. A Biomimetic Approach to Oxidized Sites in the Xanthine Oxidoreductase Family: Synthesis and Stereochemistry of Tungsten(VI) Analogue Complexes. J Am Chem Soc 2008; 130:12794-807. [DOI: 10.1021/ja804000k] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Stanislav Groysman
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, and Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
| | - Jun-Jieh Wang
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, and Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
| | - Ranitendranath Tagore
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, and Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
| | - Sonny C. Lee
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, and Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
| | - R. H. Holm
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, and Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada N2L 3G1
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