1
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Song H, Szymczak NK. Lewis Acid-Tethered (cAAC)-Copper Complexes: Reactivity for Hydride Transfer and Catalytic CO 2 Hydrogenation. Angew Chem Int Ed Engl 2024; 63:e202411099. [PMID: 38967599 DOI: 10.1002/anie.202411099] [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: 06/12/2024] [Revised: 07/04/2024] [Accepted: 07/05/2024] [Indexed: 07/06/2024]
Abstract
We present a series of borane-tethered cyclic (alkyl)(amino)carbene (cAAC)-copper complexes, including a borane-capped Cu(I) hydride. This hydride is unusually hydridic and reacts rapidly with both CO2 and 2,6-dimethylphenol at room temperature. Its reactivity is distinct from variants without a tethered borane, and the underlying principles governing the enhanced hydricity were evaluated experimentally and theoretically. These stoichiometric results were extended to catalytic CO2 hydrogenation, and the borane-tethered (intramolecular) system exhibits ~3-fold enhancement relative to an intermolecular system.
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Affiliation(s)
- Hayoung Song
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan, 48109, United States
| | - Nathaniel K Szymczak
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan, 48109, United States
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2
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Grasruck A, Parla G, Lou L, Langer J, Neiß C, Herrera A, Frieß S, Görling A, Schmid G, Dorta R. Trapping of soluble, KCl-stabilized Cu(I) hydrides with CO 2 gives crystalline formates. Chem Commun (Camb) 2023; 59:13879-13882. [PMID: 37933531 DOI: 10.1039/d3cc03033d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
Cu(I)-Hydrido complexes supported by dibenzo[b,f]azepinyl P-alkene hybrid ligands and stabilized by electrostatic interactions in a Cu-H⋯KCl⋯BR3 arrangement can be trapped with CO2 at low temperature to afford Cu(I)-formates. The complexes are isolable with and without a pendant BEt3 group and show strong Cu-O and weak B-O interactions.
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Affiliation(s)
- Alexander Grasruck
- Department Chemie und Pharmazie, Anorganische und Allgemeine Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany.
| | - Giorgio Parla
- Department Chemie und Pharmazie, Anorganische und Allgemeine Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany.
| | - Lisha Lou
- Department Chemie und Pharmazie, Anorganische und Allgemeine Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany.
| | - Jens Langer
- Department Chemie und Pharmazie, Anorganische und Allgemeine Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany.
| | - Christian Neiß
- Department Chemie und Pharmazie, Theoretische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - Alberto Herrera
- Department Chemie und Pharmazie, Anorganische und Allgemeine Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany.
| | - Sybille Frieß
- Department Chemie und Pharmazie, Anorganische und Allgemeine Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany.
| | - Andreas Görling
- Department Chemie und Pharmazie, Theoretische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - Günter Schmid
- Siemens Energy Global GmbH & Co. KG, New Energy Business - Technology & Products, Freyeslebenstraße 1, 91058 Erlangen, Germany
| | - Romano Dorta
- Department Chemie und Pharmazie, Anorganische und Allgemeine Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany.
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3
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Schopper N, Landmann J, Sprenger JAP, Zapf L, Bertermann R, Ignat'ev NV, Finze M. Alkylcyanoborate Anions: Building Blocks for Fluorine-Free Low-Viscosity, Electrochemically and Thermally Stable Ionic Liquids. Chemistry 2023; 29:e202301497. [PMID: 37395305 DOI: 10.1002/chem.202301497] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Revised: 07/01/2023] [Accepted: 07/03/2023] [Indexed: 07/04/2023]
Abstract
A set of mixed-substituted potassium alkylcyano- and alkylcyanofluoroborates has been synthesized using easily accessible starting compounds and characterized by elemental analysis, NMR and vibrational spectroscopy, and mass spectrometry. In addition, single-crystal structures of salts of the cyanoborate anions have been derived from X-ray diffraction experiments. The 1-ethyl-3-methylimidazolium room temperature ionic liquids ([EMIm]+ -RTILs) with the new borate anions have been synthesized and their physicochemical properties, that is, high thermal and electrochemical stability, low viscosity, and high conductivity, have been compared to the properties of related [EMIm]+ -RTILs. The influence of the different alkyl substituents at boron has been assessed. The exemplary study on the properties with the [EMIm]+ -ILs with the mixed water stable alkylcyanoborate anions points towards the potential of these fluorine-free borate anions, in general.
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Affiliation(s)
- Nils Schopper
- Julius-Maximilians-Universität Würzburg, Institut für Anorganische Chemie, Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Am Hubland, 97074, Würzburg, Germany
| | - Johannes Landmann
- Julius-Maximilians-Universität Würzburg, Institut für Anorganische Chemie, Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Am Hubland, 97074, Würzburg, Germany
| | - Jan A P Sprenger
- Julius-Maximilians-Universität Würzburg, Institut für Anorganische Chemie, Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Am Hubland, 97074, Würzburg, Germany
| | - Ludwig Zapf
- Julius-Maximilians-Universität Würzburg, Institut für Anorganische Chemie, Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Am Hubland, 97074, Würzburg, Germany
| | - Rüdiger Bertermann
- Julius-Maximilians-Universität Würzburg, Institut für Anorganische Chemie, Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Am Hubland, 97074, Würzburg, Germany
| | - Nikolai V Ignat'ev
- Julius-Maximilians-Universität Würzburg, Institut für Anorganische Chemie, Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Am Hubland, 97074, Würzburg, Germany
- Consultant, Merck Life Science KGaA, 64293, Darmstadt, Germany
| | - Maik Finze
- Julius-Maximilians-Universität Würzburg, Institut für Anorganische Chemie, Institut für nachhaltige Chemie & Katalyse mit Bor (ICB), Am Hubland, 97074, Würzburg, Germany
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4
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Beamer AW, Buss JA. Synthesis, Structural Characterization, and CO 2 Reactivity of a Constitutionally Analogous Series of Tricopper Mono-, Di-, and Trihydrides. J Am Chem Soc 2023. [PMID: 37276588 DOI: 10.1021/jacs.3c04170] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The formation of hydrides at heterogeneous copper surfaces results in dramatic structural and reactivity changes, yet the morphologies of these materials and their respective roles in catalysis are not well understood. Of particular interest is the reactivity of heterogeneous copper hydrides with carbon dioxide (CO2), an early mechanistic branching point in the CO2 reduction reaction. Herein, we report the synthesis, characterization, and reactivity of tricopper compounds supported by a facially biased, chelating tris(carbene) ligand scaffold. This sterically bulky environment affords access to an isolable series of tricopper hydrides: [LCu3H]2+ (4), [LCu3H2]+ (3), and LCu3H3 (6). Single-crystal X-ray diffraction and solution NMR spectroscopy studies reveal both geometric flexibility within the Cu3 core and fluxionality of hydride ligands across the Cu3 cluster, providing both atomically precise experimental analogues of static surface species and emulating dynamic ligand behavior proposed for surfaces. Electronic structure calculations serve as a predictor of hydricity, which was likewise benchmarked experimentally via both protonolysis and hydride abstraction reactions. Increased hydride number (and commensurately lower cluster charge) results in more hydridic complexes, with a thermodynamic hydricity range spanning >30 kcal/mol. These thermochemical studies serve as an accurate predictor of CO2 reactivity. Together, this Cu3Hx series exhibits the structure/reactivity relationships proposed for catalytically active copper surfaces, validating the application of carefully designed molecular clusters toward elucidating mechanisms in surface science.
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Affiliation(s)
- Andrew W Beamer
- Willard Henry Dow Laboratory, Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Joshua A Buss
- Willard Henry Dow Laboratory, Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
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5
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Norwine EE, Kiernicki JJ, Zeller M, Szymczak NK. Distinct Reactivity Modes of a Copper Hydride Enabled by an Intramolecular Lewis Acid. J Am Chem Soc 2022; 144:15038-15046. [PMID: 35960993 PMCID: PMC10291504 DOI: 10.1021/jacs.2c02937] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
We disclose a 1,4,7-triazacyclononane (TACN) ligand featuring an appended boron Lewis acid. Metalation with Cu(I) affords a series of tetrahedral complexes including a boron-capped cuprous hydride. We demonstrate distinct reactivity modes as a function of chemical oxidation: hydride transfer to CO2 in the copper(I) state and oxidant-induced H2 evolution as well as alkyne reduction.
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Affiliation(s)
- Emily E. Norwine
- University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA)
| | - John J. Kiernicki
- University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA)
| | - Matthias Zeller
- H. C. Brown Laboratory, Purdue University, 560 Oval Dr., West Lafayette, IN 47907 (USA)
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6
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Carroll TG, Ryan DE, Erickson JD, Bullock RM, Tran BL. Isolation of a Cu–H Monomer Enabled by Remote Steric Substitution of a N-Heterocyclic Carbene Ligand: Stoichiometric Insertion and Catalytic Hydroboration of Internal Alkenes. J Am Chem Soc 2022; 144:13865-13873. [DOI: 10.1021/jacs.2c05376] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Timothy G. Carroll
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - David E. Ryan
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Jeremy D. Erickson
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - R. Morris Bullock
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Ba L. Tran
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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7
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Unexpected results of the reactions of manganese and vanadium β-diketiminate halide complexes with Na[HBEt3]. Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3549-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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8
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Mikhaylov VN, Balova IA. Alternative Transformations of N-Heterocyclic Carbene Complexes of the Group 11 Metals in Transmetalation Reactions (A Review). RUSS J GEN CHEM+ 2021. [DOI: 10.1134/s1070363221110098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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9
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Aloisi A, Crochet É, Nicolas E, Berthet JC, Lescot C, Thuéry P, Cantat T. Copper–Ligand Cooperativity in H2 Activation Enables the Synthesis of Copper Hydride Complexes. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00212] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alicia Aloisi
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191 Gif-sur-Yvette, France
| | - Étienne Crochet
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191 Gif-sur-Yvette, France
| | - Emmanuel Nicolas
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191 Gif-sur-Yvette, France
| | | | - Camille Lescot
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191 Gif-sur-Yvette, France
| | - Pierre Thuéry
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191 Gif-sur-Yvette, France
| | - Thibault Cantat
- Université Paris-Saclay, CEA, CNRS, NIMBE, 91191 Gif-sur-Yvette, France
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10
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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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11
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Tran BL, Neisen BD, Speelman AL, Gunasekara T, Wiedner ES, Bullock RM. Mechanistic Studies on the Insertion of Carbonyl Substrates into Cu‐H: Different Rate‐Limiting Steps as a Function of Electrophilicity. Angew Chem Int Ed Engl 2020; 59:8645-8653. [DOI: 10.1002/anie.201916406] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/01/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Ba L. Tran
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Benjamin D. Neisen
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Amy L. Speelman
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Thilina Gunasekara
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Eric S. Wiedner
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - R. Morris Bullock
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
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12
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Tran BL, Neisen BD, Speelman AL, Gunasekara T, Wiedner ES, Bullock RM. Mechanistic Studies on the Insertion of Carbonyl Substrates into Cu‐H: Different Rate‐Limiting Steps as a Function of Electrophilicity. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916406] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Ba L. Tran
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Benjamin D. Neisen
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Amy L. Speelman
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Thilina Gunasekara
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Eric S. Wiedner
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - R. Morris Bullock
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
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13
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Baughman NN, Popp BV. Evidence of Boron Assistance for CO2 Activation during Copper-Catalyzed Boracarboxylation of Vinyl Arenes: A Synthetic Model for Cooperative Fixation of CO2. COMMENT INORG CHEM 2020. [DOI: 10.1080/02603594.2020.1726328] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Notashia N. Baughman
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia, USA
| | - Brian V. Popp
- C. Eugene Bennett Department of Chemistry, West Virginia University, Morgantown, West Virginia, USA
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14
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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: 277] [Impact Index Per Article: 55.4] [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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15
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Ritter F, Mukherjee D, Spaniol TP, Hoffmann A, Okuda J. A Masked Cuprous Hydride as a Catalyst for Carbonyl Hydrosilylation in Aqueous Solutions. Angew Chem Int Ed Engl 2019; 58:1818-1822. [DOI: 10.1002/anie.201811890] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Indexed: 01/06/2023]
Affiliation(s)
- Florian Ritter
- Institute of Inorganic ChemistryRWTH Aachen University Landoltweg 1 52056 Aachen Germany
| | - Debabrata Mukherjee
- Institute of Inorganic ChemistryRWTH Aachen University Landoltweg 1 52056 Aachen Germany
- Current address: Department of ChemistryIndian Institute of Technology Kharagpur Kharagpur West Bengal 721302 India
| | - Thomas P. Spaniol
- Institute of Inorganic ChemistryRWTH Aachen University Landoltweg 1 52056 Aachen Germany
| | - Alexander Hoffmann
- Institute of Inorganic ChemistryRWTH Aachen University Landoltweg 1 52056 Aachen Germany
| | - Jun Okuda
- Institute of Inorganic ChemistryRWTH Aachen University Landoltweg 1 52056 Aachen Germany
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16
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Ritter F, Mukherjee D, Spaniol TP, Hoffmann A, Okuda J. Ein maskiertes Kupferhydrid als Katalysator für die Carbonylhydrosilylierung in wässrigen Lösungen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201811890] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Florian Ritter
- Institut für Anorganische ChemieRWTH Aachen University Landoltweg 1 52056 Aachen Deutschland
| | - Debabrata Mukherjee
- Derzeitige Adresse: Department of ChemistryIndian Institute of Technology Kharagpur Kharagpur Westbengalen 721302 Indien
| | - Thomas P. Spaniol
- Institut für Anorganische ChemieRWTH Aachen University Landoltweg 1 52056 Aachen Deutschland
| | - Alexander Hoffmann
- Institut für Anorganische ChemieRWTH Aachen University Landoltweg 1 52056 Aachen Deutschland
| | - Jun Okuda
- Institut für Anorganische ChemieRWTH Aachen University Landoltweg 1 52056 Aachen Deutschland
- Derzeitige Adresse: Department of ChemistryIndian Institute of Technology Kharagpur Kharagpur Westbengalen 721302 Indien
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17
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Johnson A, Martínez-Martínez AJ, Macgregor SA, Weller AS. A d 10 Ag(i) amine-borane σ-complex and comparison with a d 8 Rh(i) analogue: structures on the η 1 to η 2:η 2 continuum. Dalton Trans 2019; 48:9776-9781. [PMID: 31012457 DOI: 10.1039/c9dt00971j] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
H3B·NMe3 σ-complexes of d8 [(L1)Rh][BArF4] and d10 [(L1)Ag][BArF4] (where L1 = 2,6-bis-[1-(2,6-diisopropylphenylimino)ethyl]pyridine) have been prepared and structurally characterised. Analysis of the molecular and electronic structures reveal important but subtle differences in the nature of the bonding in these σ-complexes, which differ only by the identity of the metal centre and the d-electron count. With Rh the amine-borane binds in an η2:η2 fashion, whereas at Ag the unsymmetrical {AgH3B·NMe3} unit suggests a structure lying between the η2:η2 and η1 extremes.
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Affiliation(s)
- Alice Johnson
- Chemistry Research Laboratories, Department of Chemistry, University of Oxford, Oxford, OX1 3TA, UK.
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18
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Cyclometalation and pentafluorophenyl transfer in protonolysis of a chelating Bis-NHC Platinum(II) complex. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.08.023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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19
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20
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Romero EA, Zhao T, Nakano R, Hu X, Wu Y, Jazzar R, Bertrand G. Tandem copper hydride–Lewis pair catalysed reduction of carbon dioxide into formate with dihydrogen. Nat Catal 2018. [DOI: 10.1038/s41929-018-0140-3] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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21
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Hall JW, Unson DML, Brunel P, Collins LR, Cybulski MK, Mahon MF, Whittlesey MK. Copper-NHC-Mediated Semihydrogenation and Hydroboration of Alkynes: Enhanced Catalytic Activity Using Ring-Expanded Carbenes. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00467] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jonathan W. Hall
- Department of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, United Kingdom
| | - Darcy M. L. Unson
- Department of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, United Kingdom
| | - Paul Brunel
- Department of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, United Kingdom
| | - Lee R. Collins
- Department of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, United Kingdom
| | - Mateusz K. Cybulski
- Department of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, United Kingdom
| | - Mary F. Mahon
- Department of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, United Kingdom
| | - Michael K. Whittlesey
- Department of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, United Kingdom
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22
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Sebest F, Dunsford JJ, Adams M, Pivot J, Newman PD, Díez‐González S. Ring-Expanded N-Heterocyclic Carbenes for Copper-Mediated Azide-Alkyne Click Cycloaddition Reactions. ChemCatChem 2018; 10:2041-2045. [PMID: 29861792 PMCID: PMC5969269 DOI: 10.1002/cctc.201701992] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Indexed: 11/08/2022]
Abstract
A series of well-defined copper(I) complexes bearing ring-expanded N-heterocyclic carbene (NHC) ligands has been applied to the azide-alkyne cycloaddition reaction. The obtained results notably showed that the six-membered NHC ligands outperform well-established five-membered ones. [CuI(Mes-6)] displayed a remarkable catalytic activity while respecting the strict criteria for click reactions.
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Affiliation(s)
- Filip Sebest
- Department of ChemistryImperial College LondonExhibition Road, South KensingtonLondonSW7 2AZUK
| | | | - Matthew Adams
- Department of ChemistryImperial College LondonExhibition Road, South KensingtonLondonSW7 2AZUK
| | - Jeremy Pivot
- Department of ChemistryImperial College LondonExhibition Road, South KensingtonLondonSW7 2AZUK
| | | | - Silvia Díez‐González
- Department of ChemistryImperial College LondonExhibition Road, South KensingtonLondonSW7 2AZUK
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23
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Roy MMD, Ferguson MJ, McDonald R, Rivard E. Approaching monocoordination at a silver(i) cation. Chem Commun (Camb) 2018; 54:483-486. [DOI: 10.1039/c7cc08418h] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A series of highly electrophilic [(NHC)Ag]+ complexes (NHC = N-heterocyclic carbene) have been prepared which approach the limit of monocoordination for silver(i).
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Affiliation(s)
- Matthew M. D. Roy
- Department of Chemistry
- University of Alberta
- 11227 Saskatchewan Drive
- Edmonton
- Canada
| | - Michael J. Ferguson
- Department of Chemistry
- University of Alberta
- 11227 Saskatchewan Drive
- Edmonton
- Canada
| | - Robert McDonald
- Department of Chemistry
- University of Alberta
- 11227 Saskatchewan Drive
- Edmonton
- Canada
| | - Eric Rivard
- Department of Chemistry
- University of Alberta
- 11227 Saskatchewan Drive
- Edmonton
- Canada
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24
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Ellul CE, Lowe JP, Mahon MF, Raithby PR, Whittlesey MK. [Ru3(6-NHC)(CO)10]: synthesis, characterisation and reactivity of rare 46-electron tri-ruthenium clusters. Dalton Trans 2018; 47:4518-4523. [DOI: 10.1039/c8dt00189h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The room temperature reaction of 6-membered ring N-heterocyclic carbenes with [Ru3(CO)12] affords [Ru3(6-NHC)(CO)10], rare examples of coordinatively unsaturated, 46-electron tri-ruthenium clusters. Upon mild heating in the presence of C5H5N, H2 or PPh3, these compounds lose carbene.
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Affiliation(s)
| | - John P. Lowe
- Department of Chemistry
- University of Bath
- Claverton Down
- UK
| | - Mary F. Mahon
- Department of Chemistry
- University of Bath
- Claverton Down
- UK
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25
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Hicken A, White AJP, Crimmin MR. Selective Reduction of CO2
to a Formate Equivalent with Heterobimetallic Gold- - -Copper Hydride Complexes. Angew Chem Int Ed Engl 2017; 56:15127-15130. [DOI: 10.1002/anie.201709072] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Alexandra Hicken
- Department of Chemistry; Imperial College London; South Kensington London SW7 2AZ UK
| | - Andrew J. P. White
- Department of Chemistry; Imperial College London; South Kensington London SW7 2AZ UK
| | - Mark R. Crimmin
- Department of Chemistry; Imperial College London; South Kensington London SW7 2AZ UK
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26
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Hicken A, White AJP, Crimmin MR. Selective Reduction of CO2
to a Formate Equivalent with Heterobimetallic Gold- - -Copper Hydride Complexes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201709072] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alexandra Hicken
- Department of Chemistry; Imperial College London; South Kensington London SW7 2AZ UK
| | - Andrew J. P. White
- Department of Chemistry; Imperial College London; South Kensington London SW7 2AZ UK
| | - Mark R. Crimmin
- Department of Chemistry; Imperial College London; South Kensington London SW7 2AZ UK
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27
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Xi Y, Hartwig JF. Mechanistic Studies of Copper-Catalyzed Asymmetric Hydroboration of Alkenes. J Am Chem Soc 2017; 139:12758-12772. [PMID: 28787137 PMCID: PMC11620736 DOI: 10.1021/jacs.7b07124] [Citation(s) in RCA: 111] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Mechanistic studies of the copper-catalyzed asymmetric hydroboration of vinylarenes and internal alkenes are reported. Catalytic systems with both DTBM-SEGPHOS and SEGPHOS as the ligands have been investigated. With DTBM-SEGPHOS as the ligand, the resting state of the catalyst, which is also a catalytic intermediate, for hydroboration of 4-fluorostyrene is a phenethylcopper(I) complex ligated by the bisphosphine. This complex was fully characterized by NMR spectroscopy and X-ray crystallography. The turnover-limiting step in the catalytic cycle for the reaction of vinylarenes is the borylation of this phenethylcopper complex with pinacolborane (HBpin) to form the boronate ester product and a copper hydride. Experiments showed that the borylation occurs with retention of configuration at the benzylic position. β-Hydrogen elimination and insertion of the alkene to reform this phenethylcopper complex is reversible in the absence of HBpin but is irreversible during the catalytic process because reaction with HBpin is faster than β-hydrogen elimination of the phenethylcopper complex. Studies on the hydroboration of a representative internal alkene, trans-3-hexenyl 2,4,6-trichlorobenzoate, which undergoes enantio- and regioselective addition of HBpin catalyzed by DTBM-SEGPHOS, KOtBu, and CuCl, also was conducted, and these studies revealed that a DTBM-SEGPHOS-ligated copper(I) dihydridoborate complex is the resting state of the catalyst in this case. The turnover-limiting step in the catalytic cycle for hydroboration of the internal alkene is insertion of the alkene into a copper(I) hydride formed by reversible dissociation of HBpin from the copper dihydridoborate species. With SEGPHOS as the ligand, a dimeric copper hydride was observed as the dominant species during the hydroboration of 4-fluorostyrene, and this complex is not catalytically competent. DFT calculations provide a view into the origins of regio- and enantioselectivity of the catalytic process and indicate that the charge on the copper-bound carbon and delocalization of charge onto the aryl ring control the rate of the alkene insertion and the regioselectivity of the catalytic reactions of vinylarenes.
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Affiliation(s)
- Yumeng Xi
- Division of Chemical Sciences, Lawrence Berkeley National Laboratory, and Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - John F. Hartwig
- Division of Chemical Sciences, Lawrence Berkeley National Laboratory, and Department of Chemistry, University of California, Berkeley, California 94720, United States
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28
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Jacobsen H. Its Environment Engraves the Geometry of a Molecular Entity: Allyl Coordination within a Dicationic Ruthenium(IV) Complex. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00127] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Heiko Jacobsen
- KemKom, 1215 Ursulines Avenue, New
Orleans, Lousiana 70116, United States
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29
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Romero EA, Olsen PM, Jazzar R, Soleilhavoup M, Gembicky M, Bertrand G. Spectroscopic Evidence for a Monomeric Copper(I) Hydride and Crystallographic Characterization of a Monomeric Silver(I) Hydride. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700858] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Erik A. Romero
- Joint UCSD-CNRS Research Chemistry Laboratory (UMI 3555) Department of Chemistry and Biochemistry University of California San Diego La Jolla CA 92093-0358 USA
| | - Pauline M. Olsen
- Joint UCSD-CNRS Research Chemistry Laboratory (UMI 3555) Department of Chemistry and Biochemistry University of California San Diego La Jolla CA 92093-0358 USA
| | - Rodolphe Jazzar
- Joint UCSD-CNRS Research Chemistry Laboratory (UMI 3555) Department of Chemistry and Biochemistry University of California San Diego La Jolla CA 92093-0358 USA
| | - Michele Soleilhavoup
- Joint UCSD-CNRS Research Chemistry Laboratory (UMI 3555) Department of Chemistry and Biochemistry University of California San Diego La Jolla CA 92093-0358 USA
| | - Milan Gembicky
- UCSD Crystallography Facility Department of Chemistry and Biochemistry Urey Hall Room 5128 9500 Gilman Drive, M/C 0358 La Jolla CA 92093-0358 USA
| | - Guy Bertrand
- Joint UCSD-CNRS Research Chemistry Laboratory (UMI 3555) Department of Chemistry and Biochemistry University of California San Diego La Jolla CA 92093-0358 USA
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30
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Romero EA, Olsen PM, Jazzar R, Soleilhavoup M, Gembicky M, Bertrand G. Spectroscopic Evidence for a Monomeric Copper(I) Hydride and Crystallographic Characterization of a Monomeric Silver(I) Hydride. Angew Chem Int Ed Engl 2017; 56:4024-4027. [DOI: 10.1002/anie.201700858] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Indexed: 01/25/2023]
Affiliation(s)
- Erik A. Romero
- Joint UCSD-CNRS Research Chemistry Laboratory (UMI 3555) Department of Chemistry and Biochemistry University of California San Diego La Jolla CA 92093-0358 USA
| | - Pauline M. Olsen
- Joint UCSD-CNRS Research Chemistry Laboratory (UMI 3555) Department of Chemistry and Biochemistry University of California San Diego La Jolla CA 92093-0358 USA
| | - Rodolphe Jazzar
- Joint UCSD-CNRS Research Chemistry Laboratory (UMI 3555) Department of Chemistry and Biochemistry University of California San Diego La Jolla CA 92093-0358 USA
| | - Michele Soleilhavoup
- Joint UCSD-CNRS Research Chemistry Laboratory (UMI 3555) Department of Chemistry and Biochemistry University of California San Diego La Jolla CA 92093-0358 USA
| | - Milan Gembicky
- UCSD Crystallography Facility Department of Chemistry and Biochemistry Urey Hall Room 5128 9500 Gilman Drive, M/C 0358 La Jolla CA 92093-0358 USA
| | - Guy Bertrand
- Joint UCSD-CNRS Research Chemistry Laboratory (UMI 3555) Department of Chemistry and Biochemistry University of California San Diego La Jolla CA 92093-0358 USA
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