1
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Neshat A, Mahdavi A, Yousefshahi MR, Cheraghi M, Eigner V, Kucerakova M, Dusek M, Rezaie F, Kaboudin B. Heteroleptic Silver(I) and Gold(I) N-Heterocyclic Carbene Complexes: Structural Characterization, Computational Analysis, Tyrosinase Inhibitory, and Biological Effects. Inorg Chem 2023; 62:16710-16724. [PMID: 37788161 DOI: 10.1021/acs.inorgchem.3c01759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/05/2023]
Abstract
Derivatization of (NHC)M-Cl (M = Ag, Au) with selected sulfur donors from the family of dialkyldithiophosphates and bis(2-mercapto-1-methylimidazolyl)borate ligands gave a series of heteroleptic mononuclear complexes. In single-crystal X-ray diffraction analysis, Ag(I) complexes adopted a trigonal planar geometry, while Au(I) complexes are near-linear. TD-DFT and hole-electron analyses of the selected complexes gave insight into the electronic features of the metal complexes. In vitro cellular tests were conducted on the human cancerous breast cell line MCF-7 using 2 and 8. The antibacterial activities of complexes 1, 2, 3, 7, 8, and IPr-Ag-Cl were also screened against Gram-positive (Staphylococcus aureus PTCC 1112) and Gram-negative (Escherichia coli PTCC 1330) bacteria. Antityrosinase and hemolytic effects of the selected compounds were also determined.
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Affiliation(s)
- Abdollah Neshat
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), 444 Prof. Sobouti Blvd., Gava Zang, Zanjan 45137-66731, Iran
| | - Atiyeh Mahdavi
- Department of Biological Sciences, Institute for Advanced Studies in Basic Sciences (IASBS), 444 Prof. Sobouti Blvd., Gava Zang, Zanjan 45137-66731, Iran
| | - Mohammad Reza Yousefshahi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), 444 Prof. Sobouti Blvd., Gava Zang, Zanjan 45137-66731, Iran
| | - Mahdi Cheraghi
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), 444 Prof. Sobouti Blvd., Gava Zang, Zanjan 45137-66731, Iran
| | - Vaclav Eigner
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, Prague 8 18221, The Czech Republic
| | - Monika Kucerakova
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, Prague 8 18221, The Czech Republic
| | - Michal Dusek
- Institute of Physics of the Czech Academy of Sciences, Na Slovance 2, Prague 8 18221, The Czech Republic
| | - Forough Rezaie
- Department of Chemistry, Shahid Chamran University of Ahvaz, Ahwaz 6135783151, Iran
| | - Babak Kaboudin
- Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), 444 Prof. Sobouti Blvd., Gava Zang, Zanjan 45137-66731, Iran
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2
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Liu Y, Chatterjee S, Cutsail GE, Peredkov S, Gupta SK, Dechert S, DeBeer S, Meyer F. Cu 4S Cluster in "0-Hole" and "1-Hole" States: Geometric and Electronic Structure Variations for the Active Cu Z* Site of N 2O Reductase. J Am Chem Soc 2023; 145:18477-18486. [PMID: 37565682 PMCID: PMC10450684 DOI: 10.1021/jacs.3c04893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Indexed: 08/12/2023]
Abstract
The active site of nitrous oxide reductase (N2OR), a key enzyme in denitrification, features a unique μ4-sulfido-bridged tetranuclear Cu cluster (the so-called CuZ or CuZ* site). Details of the catalytic mechanism have remained under debate and, to date, synthetic model complexes of the CuZ*/CuZ sites are extremely rare due to the difficulty in building the unique {Cu4(μ4-S)} core structure. Herein, we report the synthesis and characterization of [Cu4(μ4-S)]n+ (n = 2, 2; n = 3, 3) clusters, supported by a macrocyclic {py2NHC4} ligand (py = pyridine, NHC = N-heterocyclic carbene), in both their 0-hole (2) and 1-hole (3) states, thus mimicking the two active states of the CuZ* site during enzymatic N2O reduction. Structural and electronic properties of these {Cu4(μ4-S)} clusters are elucidated by employing multiple methods, including X-ray diffraction (XRD), nuclear magnetic resonance (NMR), UV/vis, electron paramagnetic resonance (EPR), Cu/S K-edge X-ray emission spectroscopy (XES), and Cu K-edge X-ray absorption spectroscopy (XAS) in combination with time-dependent density functional theory (TD-DFT) calculations. A significant geometry change of the {Cu4(μ4-S)} core occurs upon oxidation from 2 (τ4(S) = 0.46, seesaw) to 3 (τ4(S) = 0.03, square planar), which has not been observed so far for the biological CuZ(*) site and is unprecedented for known model complexes. The single electron of the 1-hole species 3 is predominantly delocalized over two opposite Cu ions via the central S atom, mediated by a π/π superexchange pathway. Cu K-edge XAS and Cu/S K-edge XES corroborate a mixed Cu/S-based oxidation event in which the lowest unoccupied molecular orbital (LUMO) has a significant S-character. Furthermore, preliminary reactivity studies evidence a nucleophilic character of the central μ4-S in the fully reduced 0-hole state.
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Affiliation(s)
- Yang Liu
- Institute
of Inorganic Chemistry, University of Göttingen, Tammannstraße 4, 37077 Göttingen, Germany
| | - Sayanti Chatterjee
- Max
Planck Institute for Chemical Energy Conversion, Stiftstrasse 34−36, 45470 Mülheim an der Ruhr, Germany
| | - George E. Cutsail
- Max
Planck Institute for Chemical Energy Conversion, Stiftstrasse 34−36, 45470 Mülheim an der Ruhr, Germany
- Institute
of Inorganic Chemistry, University of Duisburg-Essen, Universitätsstraße 7, 45117 Essen, Germany
| | - Sergey Peredkov
- Max
Planck Institute for Chemical Energy Conversion, Stiftstrasse 34−36, 45470 Mülheim an der Ruhr, Germany
| | - Sandeep K. Gupta
- Institute
of Inorganic Chemistry, University of Göttingen, Tammannstraße 4, 37077 Göttingen, Germany
| | - Sebastian Dechert
- Institute
of Inorganic Chemistry, University of Göttingen, Tammannstraße 4, 37077 Göttingen, Germany
| | - Serena DeBeer
- Max
Planck Institute for Chemical Energy Conversion, Stiftstrasse 34−36, 45470 Mülheim an der Ruhr, Germany
| | - Franc Meyer
- Institute
of Inorganic Chemistry, University of Göttingen, Tammannstraße 4, 37077 Göttingen, Germany
- International
Center for Advanced Studies of Energy Conversion (ICASEC), University of Göttingen, Tammannstraße 6, 37077 Göttingen, Germany
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3
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Sato CM, Walde RK, Bacsa J, Jordan AJ, Sadighi JP. Ligand-based control of nuclearity in (NHC)gold(I) sulfides. Dalton Trans 2021; 50:15721-15729. [PMID: 34697620 DOI: 10.1039/d1dt02616j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
N-Heterocyclic carbene (NHC) ligands support gold(I) sulfide complexes of varying nuclearity and charge. For sterically undemanding ligands, gold(I) chlorides react with sulfide to form trigold μ3-sulfido cations as the first observed products. The ligand IMes [1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene] supports a monomeric cation, whereas the ICy-(1,3-dicyclohexylimidazol-2-ylidene-) supported cation crystallises as a dimer linked through an aurophilic interaction. The more sterically demanding IDipp [1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene] supports a terminal hydrosulfide, a (μ-hydrosulfido)digold cation, and a μ3-sulfido cation. Use of the expanded-ring NHC 7Dipp [1,3-bis(2,6-diisopropylphenyl)-4,5,6,7-tetrahydro-1,3-diazepin-2-ylidene] allows the isolation of a neutral digold sulfide.
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Affiliation(s)
- Christopher M Sato
- School of Chemistry & Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, GA, USA, 30332.
| | - Rebecca K Walde
- School of Chemistry & Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, GA, USA, 30332.
| | - John Bacsa
- School of Chemistry & Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, GA, USA, 30332. .,X-ray Crystallography Center, Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA, USA, 30322
| | - Abraham J Jordan
- School of Chemistry & Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, GA, USA, 30332.
| | - Joseph P Sadighi
- School of Chemistry & Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, GA, USA, 30332.
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4
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Pladzyk A, Kowalkowska-Zedler D, Ciborska A, Schnepf A, Dołęga A. Complexes of silanethiolate ligands: Synthesis, structure, properties and application. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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5
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Rathnayaka SC, Mankad NP. Coordination chemistry of the Cu Z site in nitrous oxide reductase and its synthetic mimics. Coord Chem Rev 2021; 429:213718. [PMID: 33692589 PMCID: PMC7939133 DOI: 10.1016/j.ccr.2020.213718] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Atmospheric nitrous oxide (N2O) has garnered significant attention recently due to its dual roles as an ozone depletion agent and a potent greenhouse gas. Anthropogenic N2O emissions occur primarily through agricultural disruption of nitrogen homeostasis causing N2O to build up in the atmosphere. The enzyme responsible for N2O fixation within the geochemical nitrogen cycle is nitrous oxide reductase (N2OR), which catalyzes 2H+/2e- reduction of N2O to N2 and H2O at a tetranuclear active site, CuZ. In this review, the coordination chemistry of CuZ is reviewed. Recent advances in the understanding of biological CuZ coordination chemistry is discussed, as are significant breakthroughs in synthetic modeling of CuZ that have emerged in recent years. The latter topic includes both structurally faithful, synthetic [Cu4(µ4-S)] clusters that are able to reduce N2O, as well as dicopper motifs that shed light on reaction pathways available to the critical CuI-CuIV cluster edge of CuZ. Collectively, these advances in metalloenzyme studies and synthetic model systems provide meaningful knowledge about the physiologically relevant coordination chemistry of CuZ but also open new questions that will pose challenges in the near future.
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Affiliation(s)
- Suresh C. Rathnayaka
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Chicago, IL 60607, United States
| | - Neal P. Mankad
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Chicago, IL 60607, United States
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6
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Nahhas DR, Corrigan JF. Synthesis and characterization of ITr-protected group 11 metal trimethylsilylchalcogenolates. CAN J CHEM 2021. [DOI: 10.1139/cjc-2020-0261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This work describes the synthesis of group 11 metal trimethylsilylchalcogenolate complexes [(ITr)M-ESiMe3] stabilized by the large NHC ligand bis-1,3-tritylimidazole-2-ylidene (ITr). The thiolates and selenolates of Cu, Ag, and Au are accessed from either [(ITr)MOAc] (M = Cu, Ag) and E(SiMe3)2 or [(ITr)AuCl] and Li[ESiMe3] (E = S, Se). All complexes were characterized spectroscopically and, for the copper coordination compounds, via single crystal X-ray diffraction analysis.
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Affiliation(s)
- Dickron R. Nahhas
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada; Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, ON N6A 3K7, Canada
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada; Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, ON N6A 3K7, Canada
| | - John F. Corrigan
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada; Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, ON N6A 3K7, Canada
- Department of Chemistry, The University of Western Ontario, London, ON N6A 5B7, Canada; Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, ON N6A 3K7, Canada
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7
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Azizpoor Fard M, Polgar AM, Corrigan JF. Tethered Polynuclear Copper–Chalcogenolate Assemblies Enabled via NHC Ligation. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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8
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Matavos-Aramyan S, Soukhakian S, Jazebizadeh MH. Mononuclear Cu Complexes Based on Nitrogen Heterocyclic Carbene: A Comprehensive Review. Top Curr Chem (Cham) 2020; 378:39. [PMID: 32367181 DOI: 10.1007/s41061-020-00304-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 04/16/2020] [Indexed: 11/28/2022]
Abstract
During the last decade, organometallic, coordination, and catalytic chemistry of the three-dimensional metals such as copper (Cu) has been greatly affected by the emergence of nitrogen heterocyclic carbene (NHC) complexes. The NHCs, and in particular the mononuclear CuI-based ones, have been proven vastly useful in several applications such as in biosynthesis, catalysis, photochemistry, etc. This review tries to thoroughly describe a series of mononuclear CuI NHC complexes and their subcategories such as heteroleptics, and bidentate and tridentate heteroatom complexes, and give some detailed insights on their development, emergence, and applications. A brief outlook is also disclosed to enable other researchers to further develop a platform for future advances and studies in the field of CuI-based NHCs.
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Affiliation(s)
- Sina Matavos-Aramyan
- Research and Development Department, Division of Chemistry, Raazi Environmental Protection Foundation, Shiraz, Iran.
| | - Sadaf Soukhakian
- Research and Development Department, Division of Chemistry, Raazi Environmental Protection Foundation, Shiraz, Iran
| | - Mohammad Hossein Jazebizadeh
- Research and Development Department, Division of Chemistry, Raazi Environmental Protection Foundation, Shiraz, Iran
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9
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Rathnayaka SC, Hsu CW, Johnson BJ, Iniguez SJ, Mankad NP. Impact of Electronic and Steric Changes of Ligands on the Assembly, Stability, and Redox Activity of Cu 4(μ 4-S) Model Compounds of the Cu Z Active Site of Nitrous Oxide Reductase (N 2OR). Inorg Chem 2020; 59:6496-6507. [PMID: 32309936 DOI: 10.1021/acs.inorgchem.0c00564] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Model compounds have been widely utilized in understanding the structure and function of the unusual Cu4(μ4-S) active site (CuZ) of nitrous oxide reductase (N2OR). However, only a limited number of model compounds that mimic both structural and functional features of CuZ are available, limiting insights about CuZ that can be gained from model studies. Our aim has been to construct Cu4(μ4-S) clusters with tailored redox activity and chemical reactivity via modulating the ligand environment. Our synthetic approach uses dicopper(I) precursor complexes (Cu2L2) that assemble into a Cu4(μ4-S)L4 cluster with the addition of an appropriate sulfur source. Here, we summarize the features of the ligands L that stabilize precursor and Cu4(μ4-S) clusters, along with the alternative products that form with inappropriate ligands. The precursors are more likely to rearrange to Cu4(μ4-S) clusters when the Cu(I) ions are supported by bidentate ligands with 3-atom bridges, but steric and electronic features of the ligand also play crucial roles. Neutral phosphine donors have been found to stabilize Cu4(μ4-S) clusters in the 4Cu(I) oxidation state, while neutral nitrogen donors could not stabilize Cu4(μ4-S) clusters. Anionic formamidinate ligands have been found to stabilize Cu4(μ4-S) clusters in the 2Cu(I):2Cu(II) and 3Cu(I):1Cu(II) states, with both the formation of the dicopper(I) precursors and subsequent assembly of clusters being governed by the steric factor at the ortho positions of the N-aryl substituents. Phosphaamidinates, which combine a neutral phosphine donor and an anionic nitrogen donor in the same ligand, form multinuclear Cu(I) clusters unless the negative charge is valence-trapped on nitrogen, in which case the resulting dicopper precursor is unable to rearrange to a multinuclear cluster. Taken together, the results presented in this study provide design criteria for successful assembly of synthetic model clusters for the CuZ active site of N2OR, which should enable future insights into the chemical behavior of CuZ.
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Affiliation(s)
- Suresh C Rathnayaka
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Chia-Wei Hsu
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Brittany J Johnson
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Sarah J Iniguez
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Neal P Mankad
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607, United States
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10
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Jordan AJ, Walde RK, Schultz KM, Bacsa J, Sadighi JP. Nitrosonium Reactivity of (NHC)Copper(I) Sulfide Complexes. Inorg Chem 2019; 58:9592-9596. [DOI: 10.1021/acs.inorgchem.9b01676] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Abraham J. Jordan
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
| | - Rebecca K. Walde
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
| | - Kelly M. Schultz
- Murdock Hall, Department of Chemistry, Linfield College, McMinnville, Oregon 97128, United States
| | - John Bacsa
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
- X-ray Crystallography Center, Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Joseph P. Sadighi
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
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11
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12
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Danopoulos AA, Simler T, Braunstein P. N-Heterocyclic Carbene Complexes of Copper, Nickel, and Cobalt. Chem Rev 2019; 119:3730-3961. [PMID: 30843688 DOI: 10.1021/acs.chemrev.8b00505] [Citation(s) in RCA: 263] [Impact Index Per Article: 52.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The emergence of N-heterocyclic carbenes as ligands across the Periodic Table had an impact on various aspects of the coordination, organometallic, and catalytic chemistry of the 3d metals, including Cu, Ni, and Co, both from the fundamental viewpoint but also in applications, including catalysis, photophysics, bioorganometallic chemistry, materials, etc. In this review, the emergence, development, and state of the art in these three areas are described in detail.
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Affiliation(s)
- Andreas A Danopoulos
- Laboratory of Inorganic Chemistry , National and Kapodistrian University of Athens , Panepistimiopolis Zografou , Athens GR 15771 , Greece.,Université de Strasbourg, CNRS, Institut de Chimie UMR 7177 , Laboratoire de Chimie de Coordination , Strasbourg 67081 Cedex , France
| | - Thomas Simler
- Université de Strasbourg, CNRS, Institut de Chimie UMR 7177 , Laboratoire de Chimie de Coordination , Strasbourg 67081 Cedex , France
| | - Pierre Braunstein
- Université de Strasbourg, CNRS, Institut de Chimie UMR 7177 , Laboratoire de Chimie de Coordination , Strasbourg 67081 Cedex , France
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13
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Polgar AM, Zhang A, Mack F, Weigend F, Lebedkin S, Stillman MJ, Corrigan JF. Tuning the Metal/Chalcogen Composition in Copper(I)–Chalcogenide Clusters with Cyclic (Alkyl)(amino)carbene Ligands. Inorg Chem 2019; 58:3338-3348. [DOI: 10.1021/acs.inorgchem.8b03399] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Alexander M. Polgar
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Angel Zhang
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Fabian Mack
- Institut für Physikalische Chemie, Karlsruher Institut für Technologie, Kaiserstr. 12, 76131 Karlsruhe, Germany
| | - Florian Weigend
- Institut für Physikalische Chemie, Karlsruher Institut für Technologie, Kaiserstr. 12, 76131 Karlsruhe, Germany
- Institut für Nanotechnologie, Karlsruher Institut für Technologie, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Sergei Lebedkin
- Institut für Nanotechnologie, Karlsruher Institut für Technologie, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Martin J. Stillman
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - John F. Corrigan
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7, Canada
- Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, Ontario N6A 3K7, Canada
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14
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Cook BJ, Di Francesco GN, Ferreira RB, Lukens JT, Silberstein KE, Keegan BC, Catalano VJ, Lancaster KM, Shearer J, Murray LJ. Chalcogen Impact on Covalency within Molecular [Cu 3(μ 3-E)] 3+ Clusters (E = O, S, Se): A Synthetic, Spectroscopic, and Computational Study. Inorg Chem 2018; 57:11382-11392. [PMID: 30160943 PMCID: PMC6361137 DOI: 10.1021/acs.inorgchem.8b01000] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Reaction of the tricopper(I)-dinitrogen tris(β-diketiminate) cyclophane, Cu3(N2)L, with O-atom-transfer reagents or elemental Se affords the oxido-bridged tricopper complex Cu3(μ3-O)L (2) or the corresponding Cu3(μ3-Se)L (4), respectively. For 2 and 4, incorporation of the bridging chalcogen donor was supported by electrospray ionization mass spectrometry and K-edge X-ray absorption spectroscopy (XAS) data. Cu L2,3-edge X-ray absorption data quantify 49.5% Cu 3d character in the lowest unoccupied molecular orbital of 2, with Cu 3d participation decreasing to 33.0% in 4 and 40.8% in the related sulfide cluster Cu3(μ3-S)L (3). Multiedge XAS and UV/visible/near-IR spectra are employed to benchmark density functional theory calculations, which describe the copper-chalcogen interactions as highly covalent across the series of [Cu3(μ-E)]3+ clusters. This result highlights that the metal-ligand covalency is not reserved for more formally oxidized metal centers (i.e., CuIII + O2- vs CuII + O-) but rather is a significant contributor even at more typical ligand-field cases (i.e., Cu3II/II/I + E2-). This bonding is reminiscent of that observed in p-block elements rather than in early-transition-metal complexes.
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Affiliation(s)
- Brian J Cook
- Center for Catalysis and Florida Center for Heterocyclic Compounds, Department of Chemistry , University of Florida , Gainesville , Florida 32611-7200 , United States
| | - Gianna N Di Francesco
- Center for Catalysis and Florida Center for Heterocyclic Compounds, Department of Chemistry , University of Florida , Gainesville , Florida 32611-7200 , United States
| | - Ricardo B Ferreira
- Center for Catalysis and Florida Center for Heterocyclic Compounds, Department of Chemistry , University of Florida , Gainesville , Florida 32611-7200 , United States
| | - James T Lukens
- Department of Chemistry and Chemical Biology , Cornell University , Ithaca , New York 14853 , United States
| | - Katharine E Silberstein
- Department of Chemistry and Chemical Biology , Cornell University , Ithaca , New York 14853 , United States
| | - Brenna C Keegan
- Department of Chemistry , University of Nevada, Reno , Reno , Nevada 89557 , United States
| | - Vincent J Catalano
- Department of Chemistry , University of Nevada, Reno , Reno , Nevada 89557 , United States
| | - Kyle M Lancaster
- Department of Chemistry and Chemical Biology , Cornell University , Ithaca , New York 14853 , United States
| | - Jason Shearer
- Department of Chemistry , University of Nevada, Reno , Reno , Nevada 89557 , United States
| | - Leslie J Murray
- Center for Catalysis and Florida Center for Heterocyclic Compounds, Department of Chemistry , University of Florida , Gainesville , Florida 32611-7200 , United States
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15
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Somasundaram V, Gunawardene PN, Polgar AM, Workentin MS, Corrigan JF. NHC Ligated Group 11 Metal-Arylthiolates Containing an Azide Functionality Amenable to “Click” Reaction Chemistry. Inorg Chem 2018; 57:11184-11192. [DOI: 10.1021/acs.inorgchem.8b01750] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Vaishnavi Somasundaram
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7 Canada
| | - Praveen N. Gunawardene
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7 Canada
| | - Alexander M. Polgar
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7 Canada
| | - Mark S. Workentin
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7 Canada
- Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, Ontario N6A 3K7 Canada
| | - John F. Corrigan
- Department of Chemistry, The University of Western Ontario, London, Ontario N6A 5B7 Canada
- Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, London, Ontario N6A 3K7 Canada
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16
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Bagherzadeh S, Mankad NP. Oxidation of a [Cu 2S] complex by N 2O and CO 2: insights into a role of tetranuclearity in the Cu Z site of nitrous oxide reductase. Chem Commun (Camb) 2018; 54:1097-1100. [PMID: 29333559 PMCID: PMC5785442 DOI: 10.1039/c7cc09067f] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Oxidation of a [Cu2(μ-S)] complex by N2O or CO2 generated a [Cu2(μ-SO4)] product. In the presence of a sulfur trap, a [Cu2(μ-O)] species also formed from N2O. A [Cu2(μ-CS3)] species derived from CS2 modeled initial reaction intermediates. These observations indicate that one role of tetranuclearity in the CuZ catalytic site of nitrous oxide reductase is to protect the crucial S2- ligand from oxidation.
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Affiliation(s)
- Sharareh Bagherzadeh
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor St., Chicago, IL 60607, USA.
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Haiduc I. Inverse coordination – An emerging new chemical concept. Oxygen and other chalcogens as coordination centers. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2017.02.016] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hartmann NJ, Wu G, Hayton TW. Reactivity of a Nickel Sulfide with Carbon Monoxide and Nitric Oxide. J Am Chem Soc 2016; 138:12352-5. [DOI: 10.1021/jacs.6b08084] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Nathaniel J. Hartmann
- Department of Chemistry and
Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Guang Wu
- Department of Chemistry and
Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
| | - Trevor W. Hayton
- Department of Chemistry and
Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106, United States
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Ferrara SJ, Wang B, Haas E, Wright LeBlanc K, Mague JT, Donahue JP. Synthesis and Structures of [LCu(I)(SSiiPr3)] (L = triphos, carbene) and Related Compounds. Inorg Chem 2016; 55:9173-7. [DOI: 10.1021/acs.inorgchem.5b02811] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Skylar J. Ferrara
- Department of Chemistry, Tulane University, 6400 Freret Street, New Orleans, Louisiana 70118-5698, United States
| | - Bo Wang
- Department of Chemistry, Tulane University, 6400 Freret Street, New Orleans, Louisiana 70118-5698, United States
| | - Elaine Haas
- Department of Chemistry, Tulane University, 6400 Freret Street, New Orleans, Louisiana 70118-5698, United States
| | - Karry Wright LeBlanc
- Department of Chemistry, Tulane University, 6400 Freret Street, New Orleans, Louisiana 70118-5698, United States
| | - Joel T. Mague
- Department of Chemistry, Tulane University, 6400 Freret Street, New Orleans, Louisiana 70118-5698, United States
| | - James P. Donahue
- Department of Chemistry, Tulane University, 6400 Freret Street, New Orleans, Louisiana 70118-5698, United States
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Zhai J, Filatov AS, Hillhouse GL, Hopkins MD. Synthesis, structure, and reactions of a copper-sulfido cluster comprised of the parent Cu 2S unit: {(NHC)Cu} 2(μ-S). Chem Sci 2016; 7:589-595. [PMID: 28791108 PMCID: PMC5523119 DOI: 10.1039/c5sc03258j] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 10/19/2015] [Indexed: 12/22/2022] Open
Abstract
The first CuI2(μ-S) complex, {(IPr*)Cu}2(μ-S) (IPr* = 1,3-bis(2,6-(diphenylmethyl)-4-methylphenyl)imidazol-2-ylidene), has been synthesized, and its structure has been characterized crystallographically.
The synthesis of the first CuI2(μ-S) complex, {(IPr*)Cu}2(μ-S) (IPr* = 1,3-bis(2,6-(diphenylmethyl)-4-methylphenyl)imidazol-2-ylidene; 1), has been accomplished via three synthetic routes: (1) salt metathesis between (IPr*)CuCl and Na2S; (2) silyl-deprotection reaction between (IPr*)Cu(SSiMe3) and (IPr*)CuF; and (3) acid–base reaction between (IPr*)Cu(SH) and (IPr*)Cu(OtBu). The X-ray crystal structure of 1 exhibits two two-coordinate copper centers connected by a bent Cu–S–Cu linkage. Application of these synthetic routes to analogous precursors containing the sterically smaller ligand IPr (1,3-bis(2,6-di-isopropylphenyl)imidazol-2-ylidene), in place of IPr*, resulted in the formation of a transient product proposed as {(IPr)Cu}2(μ-S) (2), which decomposes quickly in solution. The instability of 2 probably results from the insufficient steric protection provided by IPr ligands to the unsaturated Cu2(μ-S) core; in contrast, 1 is stable both in solution and solid state for weeks. The nucleophilic sulfido ligand in 1 reacts with haloalkyl electrophiles (benzyl halides and dibromoalkanes) with formation of C–S bonds, affording (IPr*)Cu(SCH2Ph) and cyclic thioethers, respectively.
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Affiliation(s)
- Junjie Zhai
- Department of Chemistry , The University of Chicago , 929 East 57th Street , Chicago , Illinois 60637 , USA .
| | - Alexander S Filatov
- Department of Chemistry , The University of Chicago , 929 East 57th Street , Chicago , Illinois 60637 , USA .
| | - Gregory L Hillhouse
- Department of Chemistry , The University of Chicago , 929 East 57th Street , Chicago , Illinois 60637 , USA .
| | - Michael D Hopkins
- Department of Chemistry , The University of Chicago , 929 East 57th Street , Chicago , Illinois 60637 , USA .
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