101
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Peris E. Polyaromatic N-heterocyclic carbene ligands and π-stacking. Catalytic consequences. Chem Commun (Camb) 2016; 52:5777-87. [DOI: 10.1039/c6cc02017h] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article highlights how π-stacking interactions have an important influence on the catalytic properties of transition metal complexes decorated with rigid polyaromatic ligands.
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Affiliation(s)
- Eduardo Peris
- Institute of Advanced Materials (INAM)
- Universitat Jaume I
- 12071 Castellón
- Spain
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102
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Ibañez S, Poyatos M, Peris E. Mono and dimetallic pyrene-imidazolylidene complexes of iridium(iii) for the deuteration of organic substrates and the C–C coupling of alcohols. Dalton Trans 2016; 45:14154-9. [DOI: 10.1039/c6dt02942f] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Two pyrene-NHC complexes of Ir(iii) and one di-iridium(iii) complex with a pyrene-di-NHC ligand have been prepared and characterized. Their catalytic activity in the deuteration of organic substrates, and in the β-alkylation of secondary alcohols with primary alcohols is described.
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Affiliation(s)
- S. Ibañez
- Institute of Advanced Materials (INAM)
- Universitat Jaume I
- 12071-Castellón
- Spain
| | - M. Poyatos
- Institute of Advanced Materials (INAM)
- Universitat Jaume I
- 12071-Castellón
- Spain
| | - E. Peris
- Institute of Advanced Materials (INAM)
- Universitat Jaume I
- 12071-Castellón
- Spain
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103
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Vaquero M, Rovira L, Vidal-Ferran A. Supramolecularly fine-regulated enantioselective catalysts. Chem Commun (Camb) 2016; 52:11038-51. [DOI: 10.1039/c6cc04474c] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The use of supramolecular interactions in catalysis has undergone major growth in the last decade and has contributed to the major advances achieved in the field of enantioselective catalysis.
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Affiliation(s)
- Mónica Vaquero
- Institute of Chemical Research of Catalonia (ICIQ) & The Barcelona Institute of Science and Technology
- 43007 Tarragona
- Spain
| | - Laura Rovira
- Institute of Chemical Research of Catalonia (ICIQ) & The Barcelona Institute of Science and Technology
- 43007 Tarragona
- Spain
| | - Anton Vidal-Ferran
- Institute of Chemical Research of Catalonia (ICIQ) & The Barcelona Institute of Science and Technology
- 43007 Tarragona
- Spain
- ICREA
- 08010 Barcelona
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104
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Pérez-Miqueo J, Altube A, García-Lecina E, Tron A, McClenaghan ND, Freixa Z. Photoswitchable azobenzene-appended iridium(iii) complexes. Dalton Trans 2016; 45:13726-41. [DOI: 10.1039/c6dt01817c] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
The use of aliphatic-bridging units to append azobenzene fragments on triscyclometalated Ir(iii) complexes permits the construction of photoswitchable organometallics.
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Affiliation(s)
- J. Pérez-Miqueo
- Department of Applied Chemistry
- Faculty of Chemistry
- University of the Basque Country (UPV-EHU)
- 20080 San Sebastián
- Spain
| | - A. Altube
- Surfaces Division
- IK4-CIDETEC
- San Sebastián
- Spain
| | | | - A. Tron
- Institut des Sciences Moléculaires
- CNRS UMR 5255
- University of Bordeaux
- 33405 Talence
- France
| | - N. D. McClenaghan
- Institut des Sciences Moléculaires
- CNRS UMR 5255
- University of Bordeaux
- 33405 Talence
- France
| | - Z. Freixa
- Department of Applied Chemistry
- Faculty of Chemistry
- University of the Basque Country (UPV-EHU)
- 20080 San Sebastián
- Spain
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105
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Simler T, Braunstein P, Danopoulos AA. Cobalt PNCNHC ‘pincers’: ligand dearomatisation, formation of dinuclear and N2 complexes and promotion of C–H activation. Chem Commun (Camb) 2016; 52:2717-20. [DOI: 10.1039/c5cc10121b] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Ligand dearomatisation in CoII phosphino-picoline NHC-type pincers and dicobalt complexes result from side-arm metalation or C–H activation at the NHC backbone; in the latter case, an ‘anionic dicarbene’ originates from a dearomatised CoI–N2 complex.
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Affiliation(s)
- Thomas Simler
- Laboratoire de Chimie de Coordination
- Institut de Chimie (UMR 7177 CNRS)
- Université de Strasbourg
- 67081 Strasbourg Cedex
- France
| | - Pierre Braunstein
- Laboratoire de Chimie de Coordination
- Institut de Chimie (UMR 7177 CNRS)
- Université de Strasbourg
- 67081 Strasbourg Cedex
- France
| | - Andreas A. Danopoulos
- Laboratoire de Chimie de Coordination
- Institut de Chimie (UMR 7177 CNRS)
- Université de Strasbourg
- 67081 Strasbourg Cedex
- France
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106
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Ruggiero MT, Erba A, Orlando R, Korter TM. Origins of contrasting copper coordination geometries in crystalline copper sulfate pentahydrate. Phys Chem Chem Phys 2015; 17:31023-9. [PMID: 26531762 DOI: 10.1039/c5cp05554g] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Metal-aqua ion ([M(H2O)n](X+)) formation is a fundamental step in mechanisms that are central to enzymatic and industrial catalysis. Past investigations of such ions have yielded a wealth of information regarding their properties, however questions still exist involving the exact structures of these complexes. A prominent example of this is hexaaqua copper(II) ([Cu(H2O)6](2+)), with the solution versus gas-phase configurations under debate. The differences are often attributed to the intermolecular interactions between the bulk solvent and the aquated complex, resulting in structures stabilized by extended hydrogen-bonding networks. Yet solution phase systems are difficult to study due to the lack of atomic-level positional details. Crystalline solids are ideal models for comparative study, as they contain fixed structures that can be fully characterized using diffraction techniques. Here, crystalline copper sulfate pentahydrate (CuSO4·5H2O), which contains two unique copper-water geometries, was studied in order to elucidate the origin of these contrasting hydrated metal envrionments. A combination of solid-state density functional theory and low-temperature X-ray diffraction was used to probe the electronic origins of this phenomenon. This was accomplished through implementation of crystal orbital overlap population and crystal orbital Hamiltonian population analyses into a developmental version of the CRYSTAL14 software. These new computational methods help highlight the delicate interplay between electronic structure and metal-water geometries.
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Affiliation(s)
- Michael T Ruggiero
- Department of Chemistry, Syracuse University, 1-014 Center for Science and Technology, Syracuse, NY 13244-4100, USA.
| | - Alessandro Erba
- Dipartimento di Chimica and Centre of Excellence Nanostructured Interfaces and Surfaces, Università di Torino, via Giuria 5, IT-10125 Torino, Italy
| | - Roberto Orlando
- Dipartimento di Chimica and Centre of Excellence Nanostructured Interfaces and Surfaces, Università di Torino, via Giuria 5, IT-10125 Torino, Italy
| | - Timothy M Korter
- Department of Chemistry, Syracuse University, 1-014 Center for Science and Technology, Syracuse, NY 13244-4100, USA.
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107
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Gloaguen F. Electrochemistry of Simple Organometallic Models of Iron-Iron Hydrogenases in Organic Solvent and Water. Inorg Chem 2015; 55:390-8. [PMID: 26641526 DOI: 10.1021/acs.inorgchem.5b02245] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Synthetic models of the active site of iron-iron hydrogenases are currently the subjects of numerous studies aimed at developing H2-production catalysts based on cheap and abundant materials. In this context, the present report offers an electrochemist's view of the catalysis of proton reduction by simple binuclear iron(I) thiolate complexes. Although these complexes probably do not follow a biocatalytic pathway, we analyze and discuss the interplay between the reduction potential and basicity and how these antagonist properties impact the mechanisms of proton-coupled electron transfer to the metal centers. This question is central to any consideration of the activity at the molecular level of hydrogenases and related enzymes. In a second part, special attention is paid to iron thiolate complexes holding rigid and unsaturated bridging ligands. The complexes that enjoy mild reduction potentials and stabilized reduced forms are promising iron-based catalysts for the photodriven evolution of H2 in organic solvents and, more importantly, in water.
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Affiliation(s)
- Frederic Gloaguen
- UMR 6521, CNRS, Université de Bretagne Occidentale, CS 93837 , 29238 Brest, France
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108
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Telleria A, Pérez-Miqueo J, Altube A, García-Lecina E, de Cózar A, Freixa Z. Azobenzene-Appended Bis-Cyclometalated Iridium(III) Bipyridyl Complexes. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00838] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Ainhoa Altube
- Surfaces Division, IK4-CIDETEC, 20009, San Sebastián, Spain
| | | | - Abel de Cózar
- IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Spain
| | - Zoraida Freixa
- IKERBASQUE, Basque Foundation for Science, 48013, Bilbao, Spain
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109
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Chang YH, Tanigawa I, Taguchi HO, Takeuchi K, Ozawa F. Iridium(I) Complexes Bearing a Noninnocent PNP-Pincer-Type Phosphaalkene Ligand: Catalytic Application in the Base-FreeN-Alkylation of Amines with Alcohols. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500900] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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110
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111
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Khusnutdinova JR, Milstein D. Metal-Ligand Cooperation. Angew Chem Int Ed Engl 2015; 54:12236-73. [DOI: 10.1002/anie.201503873] [Citation(s) in RCA: 783] [Impact Index Per Article: 87.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Indexed: 12/25/2022]
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112
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Wang WH, Himeda Y, Muckerman JT, Manbeck GF, Fujita E. CO2 Hydrogenation to Formate and Methanol as an Alternative to Photo- and Electrochemical CO2 Reduction. Chem Rev 2015; 115:12936-73. [DOI: 10.1021/acs.chemrev.5b00197] [Citation(s) in RCA: 1023] [Impact Index Per Article: 113.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Wan-Hui Wang
- School
of Petroleum and Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Yuichiro Himeda
- National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5-1, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
- JST, ACT-C, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - James T. Muckerman
- Chemistry
Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Gerald F. Manbeck
- Chemistry
Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Etsuko Fujita
- Chemistry
Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
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113
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Jiang F, Achard M, Roisnel T, Dorcet V, Bruneau C. Ruthenium(II) and Iridium(III) Complexes Bearing Phosphinepyridonate and Phosphinequinolinolate Chelates. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500765] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Fan Jiang
- UMR6226 CNRS, Institut des Sciences Chimiques de Rennes, Université de Rennes1, OMC – Organometallics, Materials and Catalysis, http://www.scienceschimiques.univ‐rennes1.fr/equipes/omc/
| | - Mathieu Achard
- UMR6226 CNRS, Institut des Sciences Chimiques de Rennes, Université de Rennes1, OMC – Organometallics, Materials and Catalysis, http://www.scienceschimiques.univ‐rennes1.fr/equipes/omc/
| | - Thierry Roisnel
- Centre de Diffractométrie X Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Vincent Dorcet
- Centre de Diffractométrie X Campus de Beaulieu, 35042 Rennes Cedex, France
| | - Christian Bruneau
- UMR6226 CNRS, Institut des Sciences Chimiques de Rennes, Université de Rennes1, OMC – Organometallics, Materials and Catalysis, http://www.scienceschimiques.univ‐rennes1.fr/equipes/omc/
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114
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Simler T, Danopoulos AA, Braunstein P. N-Heterocyclic carbene-phosphino-picolines as precursors of anionic 'pincer' ligands with dearomatised pyridine backbones; transmetallation from potassium to chromium. Chem Commun (Camb) 2015; 51:10699-702. [PMID: 26050938 DOI: 10.1039/c5cc02920a] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Deprotonation of the α-picolinyl-CH2 in the hybrid ligands R2P–NCNHC (–N = substituted 2-picoline, R = Cy, t-Bu; CNHC = N-heterocyclic carbene) (L(R)) with KN(SiMe3)2 in ether gave [KL(Cy)–H(ether)]2 featuring a dearomatised picoline backbone. Assisted by 18-crown-6, K+ dissociation afforded the Z- and E-isomers of [L(R)–H](−). Transmetallation of L(R)–H from KL(R)–H led to [CrCl(L(t-Bu)–H)].
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Affiliation(s)
- Thomas Simler
- Laboratoire de Chimie de Coordination, Institut de Chimie (UMR 7177 CNRS), Université de Strasbourg, 4 rue Blaise Pascal, 67081 Strasbourg Cedex, France
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115
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Bow JJ, Boyle PD, Blacquiere JM. Substrate‐Mediated Deactivation of a Ru(P
t
Bu
2
N
Bn
2
) Cooperative Complex. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500798] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- John‐Paul J. Bow
- Department of Chemistry, University of Western Ontario, London, Ontario, Canada, N6A 5B7, http://www.uwo.ca/chem/people/faculty/blacquiere.htm
| | - Paul D. Boyle
- Department of Chemistry, University of Western Ontario, London, Ontario, Canada, N6A 5B7, http://www.uwo.ca/chem/people/faculty/blacquiere.htm
| | - Johanna M. Blacquiere
- Department of Chemistry, University of Western Ontario, London, Ontario, Canada, N6A 5B7, http://www.uwo.ca/chem/people/faculty/blacquiere.htm
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116
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Thompson EJ, Berben LA. Electrocatalytic Hydrogen Production by an Aluminum(III) Complex: Ligand-Based Proton and Electron Transfer. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503935] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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117
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Thompson EJ, Berben LA. Electrocatalytic Hydrogen Production by an Aluminum(III) Complex: Ligand‐Based Proton and Electron Transfer. Angew Chem Int Ed Engl 2015; 54:11642-6. [DOI: 10.1002/anie.201503935] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 07/06/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Emily J. Thompson
- Department of Chemistry, University of California, Davis, CA 95616 (USA)
| | - Louise A. Berben
- Department of Chemistry, University of California, Davis, CA 95616 (USA)
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118
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Rauchfuss TB. Diiron azadithiolates as models for the [FeFe]-hydrogenase active site and paradigm for the role of the second coordination sphere. Acc Chem Res 2015; 48:2107-16. [PMID: 26079848 DOI: 10.1021/acs.accounts.5b00177] [Citation(s) in RCA: 212] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The [FeFe] hydrogenases (H2ases) catalyze the redox reaction that interconverts protons and H2. This area of biocatalysis has attracted attention because the metal-based chemistry is unusual, and the reactions have practical implications. The active site consists of a [4Fe-4S] cluster bridged to a [Fe2(μ-dithiolate)(CN)2(CO)3](z) center (z = 1- and 2-). The dithiolate cofactor is [HN(CH2S)2](2-), called the azadithiolate ([adt(H)](2-)). Although many derivatives of Fe2(SR)2(CO)6-xLx are electrocatalysts for the hydrogen evolution reaction (HER), most operate by slow nonbiomimetic pathways. Biomimetic hydrogenogenesis is thought to involve intermediates, wherein the hydride substrate is adjacent to the amine of the adt(H), being bonded to only one Fe center. Formation of terminal hydride complexes is favored when the diiron carbonyl models contain azadithiolate. Although unstable in the free state, the adt cofactor is stable once it is affixed to the Fe2 center. It can be prepared by alkylation of Fe2(SH)2(CO)6 with formaldehyde in the presence of ammonia (to give adt(H) derivatives) or amines (to give adt(R) derivatives). Weak acids protonate Fe2(adt(R))(CO)2(PR3)4 to give terminal hydrido (term-H) complexes. In contrast, protonation of the related 1,3-propanedithiolate (pdt(2-)) complexes Fe2(pdt)(CO)2(PR3)4 requires strong acids. The amine in the azadithiolate is a kinetically fast base, relaying protons to and from the iron, which is a kinetically slow base. The crystal structure of the doubly protonated model [(term-H)Fe2(Hadt(H))(CO)2(dppv)2](2+) confirms the presence of both ammonium and terminal hydrido centers, which interact through a dihydrogen bond (dppv = cis-C2H2(PPh2)2). DFT calculations indicate that this H---H interaction is sensitive to the counterions and is strengthened upon reduction of the diiron center. For the monoprotonated models, the hydride [(term-H)Fe2(adt(H))(CO)2(dppv)2](+) exists in equilibrium with the ammonium tautomer [Fe2(Hadt(H))(CO)2(dppv)2](+). Both [(term-H)Fe2(Hadt(H))(CO)2(dppv)2](2+) and [(term-H)Fe2(adt(H))(CO)2(dppv)2](+) are highly active electrocatalysts for HER. Catalysis is initiated by reduction of the diferrous center, which induces coupling of the protic ammonium center and the hydride ligand. In contrast, the propanedithiolate [(term-H)Fe2(pdt)(CO)2(dppv)2](+) is a poor electrocatalyst for HER. Oxidation of H2 has been demonstrated, starting with models for the oxidized state ("Hox"), for example, [Fe2(adt(H))(CO)3(dppv)(PMe3)](+). Featuring a distorted Fe(II)Fe(I) center, this Hox model reacts slowly with high pressures of H2 to give [(μ-H)Fe2(adt(H))(CO)3(dppv)(PMe3)](+). Highlighting the role of the proton relay, the propanedithiolate [Fe2(pdt)(CO)3(dppv)(PMe3)](+) is unreactive toward H2. The Hox-model + H2 reaction is accelerated in the presence of ferrocenium salts, which simulate the role of the attached [4Fe-4S] cluster. The redox-complemented complex [Fe2(adt(Bn))(CO)3(dppv)(FcP*)](n+) catalyzes both proton reduction and hydrogen oxidation (FcP* = (C5Me5)Fe(C5Me4CH2PEt2)).
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Affiliation(s)
- Thomas B. Rauchfuss
- School of Chemical Sciences, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
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119
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Tang Z, Otten E, Reek JNH, van der Vlugt JI, de Bruin B. Dynamic Ligand Reactivity in a Rhodium Pincer Complex. Chemistry 2015. [DOI: 10.1002/chem.201501453] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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120
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Dub PA, Scott BL, Gordon JC. Air-Stable NNS (ENENES) Ligands and Their Well-Defined Ruthenium and Iridium Complexes for Molecular Catalysis. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00432] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Pavel A. Dub
- Chemistry Division, and ‡Materials and Physics Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Brian L. Scott
- Chemistry Division, and ‡Materials and Physics Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - John C. Gordon
- Chemistry Division, and ‡Materials and Physics Applications Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
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121
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Chang YH, Takeuchi K, Wakioka M, Ozawa F. C–H Bond Cleavage of Acetonitrile by Iridium Complexes Bearing PNP-Pincer-Type Phosphaalkene Ligands. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00207] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yung-Hung Chang
- International
Research Center for Elements Science (IRCELS), Institute for Chemical
Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Katsuhiko Takeuchi
- International
Research Center for Elements Science (IRCELS), Institute for Chemical
Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Masayuki Wakioka
- International
Research Center for Elements Science (IRCELS), Institute for Chemical
Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Fumiyuki Ozawa
- International
Research Center for Elements Science (IRCELS), Institute for Chemical
Research, Kyoto University, Uji, Kyoto 611-0011, Japan
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122
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Taguchi HO, Chang YH, Takeuchi K, Ozawa F. Catalytic Synthesis of an Unsymmetrical PNP-Pincer-Type Phosphaalkene Ligand. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00195] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hiro-omi Taguchi
- International Research Center for Elements Science (IRCELS),
Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Yung-Hung Chang
- International Research Center for Elements Science (IRCELS),
Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Katsuhiko Takeuchi
- International Research Center for Elements Science (IRCELS),
Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
| | - Fumiyuki Ozawa
- International Research Center for Elements Science (IRCELS),
Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan
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123
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Chu WY, Zhou X, Rauchfuss TB. Cooperative Metal–Ligand Reactivity and Catalysis in Low-Spin Ferrous Alkoxides. Organometallics 2015. [DOI: 10.1021/om501152h] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Wan-Yi Chu
- School of Chemical Sciences, University of Illinois, Urbana, Illinois 61801, United States
| | - Xiaoyuan Zhou
- School of Chemical Sciences, University of Illinois, Urbana, Illinois 61801, United States
| | - Thomas B. Rauchfuss
- School of Chemical Sciences, University of Illinois, Urbana, Illinois 61801, United States
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124
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Zhang D, Chen X, Liu H, Huang X. Mechanistic studies on the pH-controllable interconversion between hydrogen and formic acid in water: DFT insights. NEW J CHEM 2015. [DOI: 10.1039/c5nj01740h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Our theoretical results will facilitate the mechanistic understanding of sustainable H2 storage/delivery in homogeneous catalysis.
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Affiliation(s)
- Dandan Zhang
- Institute of Theoretical Chemistry
- Jilin University
- Changchun
- China
| | - Xiankai Chen
- Institute of Theoretical Chemistry
- Jilin University
- Changchun
- China
| | - Huiling Liu
- Institute of Theoretical Chemistry
- Jilin University
- Changchun
- China
| | - Xuri Huang
- Institute of Theoretical Chemistry
- Jilin University
- Changchun
- China
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125
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Palacios L, Di Giuseppe A, Castarlenas R, Lahoz FJ, Pérez-Torrente JJ, Oro LA. Pyridine versus acetonitrile coordination in rhodium–N-heterocyclic carbene square-planar complexes. Dalton Trans 2015; 44:5777-89. [DOI: 10.1039/c5dt00182j] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Experimental and theoretical studies on the factors that control the coordination chemistry of N-donor ligands in square-planar complexes of the type RhCl(NHC)L1L2 (NHC = N-heterocyclic carbene) are presented.
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Affiliation(s)
- Laura Palacios
- Departamento de Química Inórganica - Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)
- Universidad de Zaragoza-CSIC
- Zaragoza
- Spain
| | - Andrea Di Giuseppe
- Departamento de Química Inórganica - Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)
- Universidad de Zaragoza-CSIC
- Zaragoza
- Spain
| | - Ricardo Castarlenas
- Departamento de Química Inórganica - Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)
- Universidad de Zaragoza-CSIC
- Zaragoza
- Spain
| | - Fernando J. Lahoz
- Departamento de Química Inórganica - Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)
- Universidad de Zaragoza-CSIC
- Zaragoza
- Spain
| | - Jesús J. Pérez-Torrente
- Departamento de Química Inórganica - Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)
- Universidad de Zaragoza-CSIC
- Zaragoza
- Spain
| | - Luis A. Oro
- Departamento de Química Inórganica - Instituto de Síntesis Química y Catálisis Homogénea (ISQCH)
- Universidad de Zaragoza-CSIC
- Zaragoza
- Spain
- Center for Refining & Petrochemicals
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126
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Prajapati D, Schulzke C, Kindermann MK, Kapdi AR. Selective palladium-catalysed arylation of 2,6-dibromopyridine using N-heterocyclic carbene ligands. RSC Adv 2015. [DOI: 10.1039/c5ra10561g] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A selective palladium-catalysed arylation of 2,6-dibromopyridine has been developed by employing N-heterocyclic carbene ligands. Selective mono-arylation was performed in water/acetonitrile solvent at ambient temperature and low catalyst loading.
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Affiliation(s)
- D. Prajapati
- Department of Chemistry
- Institute of Chemical Technology
- Mumbai-400019
- India
| | - C. Schulzke
- Institute fur Biochemie
- Ernst-Moritz-Arndt Universität Greifswald
- D-17487 Greifswald
- Germany
| | - M. K. Kindermann
- Institute fur Biochemie
- Ernst-Moritz-Arndt Universität Greifswald
- D-17487 Greifswald
- Germany
| | - A. R. Kapdi
- Department of Chemistry
- Institute of Chemical Technology
- Mumbai-400019
- India
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127
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Hou C, Jiang J, Li Y, Zhang Z, Zhao C, Ke Z. Unusual non-bifunctional mechanism for Co-PNP complex catalyzed transfer hydrogenation governed by the electronic configuration of metal center. Dalton Trans 2015; 44:16573-85. [DOI: 10.1039/c5dt02163d] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The unusual non-bifunctional mechanism for CoII-PNP catalyzed transfer hydrogenation is revealed to be governed by the electronic configuration of the metal center, which is different from traditional bifunctional catalysts.
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Affiliation(s)
- Cheng Hou
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-sen University
- Guangzhou 510275
- P. R. China
| | - Jingxing Jiang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-sen University
- Guangzhou 510275
- P. R. China
| | - Yinwu Li
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-sen University
- Guangzhou 510275
- P. R. China
| | - Zhihan Zhang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-sen University
- Guangzhou 510275
- P. R. China
| | - Cunyuan Zhao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-sen University
- Guangzhou 510275
- P. R. China
| | - Zhuofeng Ke
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/KLGHEI of Environment and Energy Chemistry
- School of Chemistry and Chemical Engineering
- Sun Yat-sen University
- Guangzhou 510275
- P. R. China
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128
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Pérez-Miqueo J, Telleria A, Muñoz-Olasagasti M, Altube A, García-Lecina E, de Cózar A, Freixa Z. Azobenzene-functionalized iridium(iii) triscyclometalated complexes. Dalton Trans 2015; 44:2075-91. [DOI: 10.1039/c4dt02018a] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photochromic triscyclometalated iridium(iii) organometallic complexes based on azobenzene-containing phenylpyridyl-type ligands.
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Affiliation(s)
- J. Pérez-Miqueo
- Department of Applied Chemistry
- Faculty of Chemistry
- University of the Basque Country (UPV-EHU)
- San Sebastián
- Spain
| | - A. Telleria
- Department of Applied Chemistry
- Faculty of Chemistry
- University of the Basque Country (UPV-EHU)
- San Sebastián
- Spain
| | - M. Muñoz-Olasagasti
- Department of Applied Chemistry
- Faculty of Chemistry
- University of the Basque Country (UPV-EHU)
- San Sebastián
- Spain
| | - A. Altube
- Surfaces Division
- IK4-CIDETEC
- San Sebastián
- Spain
| | | | - A. de Cózar
- Department of Organic Chemistry II
- Faculty of Chemistry
- University of the Basque Country (UPV-EHU)
- San Sebastián
- Spain
| | - Z. Freixa
- Department of Applied Chemistry
- Faculty of Chemistry
- University of the Basque Country (UPV-EHU)
- San Sebastián
- Spain
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129
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Tseng KNT, Kampf JW, Szymczak NK. Regulation of Iron-Catalyzed Olefin Hydroboration by Ligand Modifications at a Remote Site. ACS Catal 2014. [DOI: 10.1021/cs501820w] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Kuei-Nin T. Tseng
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Jeff W. Kampf
- 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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130
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McSkimming A, Chan B, Bhadbhade MM, Ball GE, Colbran SB. Bio-Inspired Transition Metal-Organic Hydride Conjugates for Catalysis of Transfer Hydrogenation: Experiment and Theory. Chemistry 2014; 21:2821-34. [DOI: 10.1002/chem.201405129] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2014] [Indexed: 11/07/2022]
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131
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Gorgas N, Stöger B, Veiros LF, Pittenauer E, Allmaier G, Kirchner K. Efficient Hydrogenation of Ketones and Aldehydes Catalyzed by Well-Defined Iron(II) PNP Pincer Complexes: Evidence for an Insertion Mechanism. Organometallics 2014; 33:6905-6914. [PMID: 27642211 PMCID: PMC5021386 DOI: 10.1021/om5009814] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Indexed: 01/25/2023]
Abstract
We have prepared and structurally characterized a new class of Fe(II) PNP pincer hydride complexes [Fe(PNP-iPr)(H)(CO)(L)] n (L = Br-, CH3CN, pyridine, PMe3, SCN-, CO, BH4-; n = 0, +1) based on the 2,6-diaminopyridine scaffold where the PiPr2 moieties of the PNP ligand are connected to the pyridine ring via NH and/or NMe spacers. Complexes [Fe(PNP-iPr)(H)(CO)(L)] n with labile ligands (L = Br-, CH3CN, BH4-) and NH spacers are efficient catalysts for the hydrogenation of both ketones and aldehydes to alcohols under mild conditions, while those containing inert ligands (L = pyridine, PMe3, SCN-, CO) are catalytically inactive. Interestingly, complex [Fe(PNPMe-iPr)(H)(CO)(Br)], featuring NMe spacers, is an efficient catalyst for the chemoselective hydrogenation of aldehydes. The first type of complexes involves deprotonation of the PNP ligand as well as heterolytic dihydrogen cleavage via metal-alkoxide cooperation, but no reversible aromatization/deprotonation of the PNP ligand. In the case of the N-methylated complex the mechanism remains unclear, but obviously does not allow bifunctional activation of dihydrogen. The experimental results complemented by DFT calculations strongly support an insertion of the C=O bond of the carbonyl compound into the Fe-H bond.
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Affiliation(s)
- Nikolaus Gorgas
- Institute of Applied
Synthetic Chemistry and Institute of Chemical Technologies
and Analytics, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
| | - Berthold Stöger
- Institute of Applied
Synthetic Chemistry and Institute of Chemical Technologies
and Analytics, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
| | - Luis F. Veiros
- Centro
de Química Estrutural, Instituto Superior Técnico, Universidade de Lisboa, Avenida Rovisco Pais No. 1, 1049-001 Lisboa, Portugal
| | - Ernst Pittenauer
- Institute of Applied
Synthetic Chemistry and Institute of Chemical Technologies
and Analytics, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
| | - Günter Allmaier
- Institute of Applied
Synthetic Chemistry and Institute of Chemical Technologies
and Analytics, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
| | - Karl Kirchner
- Institute of Applied
Synthetic Chemistry and Institute of Chemical Technologies
and Analytics, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
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132
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Zhai F, Jordan RF. Hydrogen Bonding Behavior of Amide-Functionalized α-Diimine Palladium Complexes. Organometallics 2014. [DOI: 10.1021/om500978n] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Feng Zhai
- Department of Chemistry, The University of Chicago, 5735 South
Ellis Avenue, Chicago, Illinois 60637, United States
| | - Richard F. Jordan
- Department of Chemistry, The University of Chicago, 5735 South
Ellis Avenue, Chicago, Illinois 60637, United States
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133
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Valdés H, Poyatos M, Ujaque G, Peris E. Experimental and theoretical approaches to the influence of the addition of pyrene to a series of Pd and Ni NHC-based complexes: catalytic consequences. Chemistry 2014; 21:1578-88. [PMID: 25413787 DOI: 10.1002/chem.201404618] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Indexed: 11/12/2022]
Abstract
A series of Ni and Pd complexes with three different N-heterocyclic carbene (NHC)-based ligands (imidazolylidene, benzimidazolylidene and pyrene-imidazolylidene) has been prepared and fully characterized. The influence of the addition of pyrene to solutions containing these complexes is studied by means of NMR and UV/Vis spectroscopies and by cyclic voltammetry. The addition of pyrene to the pyrene-NHC-containing Pd and Ni complexes gives rise to the formation of adducts by π-π stacking interactions between pyrene and the pyrene group of the NHC ligand. This interaction causes a modification of the electronic properties of the metal, as demonstrated by cyclic voltammetric studies of the Ni-NHC complexes. Theoretical calculations support this type of π-interactions, and justify the higher interactions observed with the pyrene-NHC containing complexes. The catalytic activities of the complexes were tested in the Suzuki-Miyaura C-C coupling and in the α-arylation of ketones. The addition of pyrene as an external π-stacking additive does not affect the activities of the complexes in the Suzuki-Miyaura coupling, but this observation may be justified due to the fact that the process is heterogeneously catalyzed, as indicated by the mercury-drop test. The addition of pyrene to the catalytic α-arylation of ketones results in a decrease in the activity of the reactions catalyzed by the pyrene-imidazolylidene palladium complex, whereas the other two catalysts do not modify their activity in the presence of this π-stacking additive.
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Affiliation(s)
- Hugo Valdés
- Dpto. de Química Inorgánica y Orgánica, Universitat Jaume I, Avda. Sos Baynat, 12071 Castellón (Spain)
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134
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Suna Y, Ertem MZ, Wang WH, Kambayashi H, Manaka Y, Muckerman JT, Fujita E, Himeda Y. Positional Effects of Hydroxy Groups on Catalytic Activity of Proton-Responsive Half-Sandwich Cp*Iridium(III) Complexes. Organometallics 2014. [DOI: 10.1021/om500832d] [Citation(s) in RCA: 86] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Yuki Suna
- National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Mehmed Z. Ertem
- Chemistry
Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Wan-Hui Wang
- National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
- Japan Science and Technology Agency, ACT-C, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 Japan
| | - Hide Kambayashi
- National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - Yuichi Manaka
- National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
| | - James T. Muckerman
- Chemistry
Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Etsuko Fujita
- Chemistry
Department, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Yuichiro Himeda
- National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki 305-8565, Japan
- Japan Science and Technology Agency, ACT-C, 4-1-8 Honcho, Kawaguchi, Saitama 332-0012 Japan
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135
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Azpíroz R, Rubio-Pérez L, Di Giuseppe A, Passarelli V, Lahoz FJ, Castarlenas R, Pérez-Torrente JJ, Oro LA. Rhodium(I)-N-Heterocyclic Carbene Catalyst for Selective Coupling of N-Vinylpyrazoles with Alkynes via C–H Activation. ACS Catal 2014. [DOI: 10.1021/cs501366q] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ramón Azpíroz
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza, CSIC, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Laura Rubio-Pérez
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza, CSIC, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Andrea Di Giuseppe
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza, CSIC, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Vincenzo Passarelli
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza, CSIC, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
- Centro
Universitario
de la Defensa, Ctra Huesca S/N 50090 Zaragoza, Spain
| | - Fernando J. Lahoz
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza, CSIC, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Ricardo Castarlenas
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza, CSIC, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
- ARAID Foundation, Zaragoza, Spain
| | - Jesús J. Pérez-Torrente
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza, CSIC, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - Luis A. Oro
- Departamento
de Química Inorgánica, Instituto de Síntesis
Química y Catálisis Homogénea-ISQCH, Universidad de Zaragoza, CSIC, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
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136
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Fogler E, Garg JA, Hu P, Leitus G, Shimon LJW, Milstein D. System with potential dual modes of metal-ligand cooperation: highly catalytically active pyridine-based PNNH-Ru pincer complexes. Chemistry 2014; 20:15727-31. [PMID: 25331061 DOI: 10.1002/chem.201405295] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Indexed: 01/02/2023]
Abstract
Metal-ligand cooperation (MLC) plays an important role in catalysis. Systems reported so far are generally based on a single mode of MLC. We report here a system with potential for MLC by both amine-amide and aromatization-dearomatization ligand transformations, based on a new class of phosphino-pyridyl ruthenium pincer complexes, bearing sec-amine coordination. These pincer complexes are effective catalysts under unprecedented mild conditions for acceptorless dehydrogenative coupling of alcohols to esters at 35 °C and hydrogenation of esters at room temperature and 5 atm H2. The likely actual catalyst, a novel, crystallographically characterized monoanionic de-aromatized enamido-Ru(II) complex, was obtained by deprotonation of both the N-H and the methylene proton of the N-arm of the pincer ligand.
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Affiliation(s)
- Eran Fogler
- Department of Organic Chemistry, Weizmann Institute of Science, Rehovot, 76100 (Israel)
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137
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Sanz CA, Ferguson MJ, McDonald R, Patrick BO, Hicks RG. Classical and non-classical redox reactions of Pd(II) complexes containing redox-active ligands. Chem Commun (Camb) 2014; 50:11676-8. [PMID: 25140739 DOI: 10.1039/c4cc04863f] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reactivity studies of a Pd(II)-verdazyl complex reveal novel ligand-centred reduction processes which trigger pseudo-reductive elimination at Pd. Reaction of the complex with water induces a ligand-centred redox disproportionation. The reduced verdazyl ligands can also be reversibly protonated.
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Affiliation(s)
- Corey A Sanz
- Department of Chemistry, University of Victoria, PO Box 3065 STN CSC, Victoria, BC V8W 3V6, Canada.
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138
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Toda T, Kuwata S, Ikariya T. Unsymmetrical pincer-type ruthenium complex containing β-protic pyrazole and N-heterocyclic carbene arms: comparison of Brønsted acidity of NH groups in second coordination sphere. Chemistry 2014; 20:9539-42. [PMID: 24965086 DOI: 10.1002/chem.201403179] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2014] [Indexed: 12/30/2022]
Abstract
A reaction of a 2-(imidazol-1-yl)methyl-6-(pyrazol-3-yl)pyridine with [RuCl2 (PPh3 )3 ] resulted in tautomerization of the imidazole unit to afford the unsymmetrical pincer-type ruthenium complex 2 containing a protic pyrazole and N-heterocyclic carbene (NHC) arms. Deprotonation of 2 with one equivalent of a base led to the formation of the NHC-pyrazolato complex 3, indicating that the protic NHC arm is less acidic. When 2 was treated with two equivalents of a base under H2 or in 2-propanol, the hydrido complex 4 containing protic NHC and pyrazolato groups was obtained through metal-ligand cooperation.
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Affiliation(s)
- Tatsuro Toda
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552 (Japan), Fax: (+81) 3-5734-2637
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139
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Crawford KM, Ramseyer TR, Daley CJA, Clark TB. Phosphine-Directed CH Borylation Reactions: Facile and Selective Access to Ambiphilic Phosphine Boronate Esters. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402868] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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140
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Crawford KM, Ramseyer TR, Daley CJA, Clark TB. Phosphine-Directed CH Borylation Reactions: Facile and Selective Access to Ambiphilic Phosphine Boronate Esters. Angew Chem Int Ed Engl 2014; 53:7589-93. [DOI: 10.1002/anie.201402868] [Citation(s) in RCA: 98] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 04/23/2014] [Indexed: 11/09/2022]
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141
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Annibale VT, Song D. Reaction of Dinuclear Rhodium 4,5-Diazafluorenyl-9-Carboxylate Complexes with H2 and CO2. Organometallics 2014. [DOI: 10.1021/om500278a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Vincent T. Annibale
- Davenport
Chemical Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario Canada M5S 3H6
| | - Datong Song
- Davenport
Chemical Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario Canada M5S 3H6
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142
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Zeng M, Li L, Herzon SB. A Highly Active and Air-Stable Ruthenium Complex for the Ambient Temperature Anti-Markovnikov Reductive Hydration of Terminal Alkynes. J Am Chem Soc 2014; 136:7058-67. [DOI: 10.1021/ja501738a] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Mingshuo Zeng
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Le Li
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520, United States
| | - Seth B. Herzon
- Department
of Chemistry, Yale University, New Haven, Connecticut 06520, United States
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143
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Yoshida J, Kuwahara K, Yuge H. A mixed-valence dinuclear ruthenium complex composed of Ru(II)-acetylide and Ru(III)-tropolonato units: Acetylide–vinylidene interconversion in solution and solid state. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.01.018] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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144
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González-Gallardo S, Kuzu I, Oña-Burgos P, Wolfer T, Wang C, Klinkhammer KW, Klopper W, Bräse S, Breher F. Coinage Metal Complexes of Tris(pyrazolyl)methanide-Based Redox-Active Metalloligands. Organometallics 2014. [DOI: 10.1021/om4010498] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sandra González-Gallardo
- Institute
of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Istemi Kuzu
- Institute
of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Pascual Oña-Burgos
- Institute
of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Tanja Wolfer
- Institute
of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Cong Wang
- Institute
of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | - Karl W. Klinkhammer
- Institute
of Inorganic Chemistry and Analytical Chemistry, J. Gutenberg University, Duesbergweg 10-14, 55128 Mainz, Germany
| | - Wim Klopper
- Institute
of Physical Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 2, 76131 Karlsruhe, Germany
| | - Stefan Bräse
- Institute
of Organic Chemistry, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 6, D-76131 Karlsruhe, Germany
| | - Frank Breher
- Institute
of Inorganic Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
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145
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Le Goff A, Vénec D, Le Roy C, Pétillon FY, Schollhammer P, Talarmin J. Acid-Base Control of Hemilabile Proton-Responsive Protecting Devices in Dimolybdenum, Thiolate-Bridged Complexes. Inorg Chem 2014; 53:2200-10. [DOI: 10.1021/ic402873c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Alan Le Goff
- UMR CNRS 6521 ≪ Chimie,
Electrochimie Moléculaires et Chimie Analytique ≫ Université de Bretagne Occidentale, UFR Sciences et Techniques, CS 93837, 29238 Brest-Cedex
3, France
| | - David Vénec
- UMR CNRS 6521 ≪ Chimie,
Electrochimie Moléculaires et Chimie Analytique ≫ Université de Bretagne Occidentale, UFR Sciences et Techniques, CS 93837, 29238 Brest-Cedex
3, France
| | - Christine Le Roy
- UMR CNRS 6521 ≪ Chimie,
Electrochimie Moléculaires et Chimie Analytique ≫ Université de Bretagne Occidentale, UFR Sciences et Techniques, CS 93837, 29238 Brest-Cedex
3, France
| | - François Y. Pétillon
- UMR CNRS 6521 ≪ Chimie,
Electrochimie Moléculaires et Chimie Analytique ≫ Université de Bretagne Occidentale, UFR Sciences et Techniques, CS 93837, 29238 Brest-Cedex
3, France
| | - Philippe Schollhammer
- UMR CNRS 6521 ≪ Chimie,
Electrochimie Moléculaires et Chimie Analytique ≫ Université de Bretagne Occidentale, UFR Sciences et Techniques, CS 93837, 29238 Brest-Cedex
3, France
| | - Jean Talarmin
- UMR CNRS 6521 ≪ Chimie,
Electrochimie Moléculaires et Chimie Analytique ≫ Université de Bretagne Occidentale, UFR Sciences et Techniques, CS 93837, 29238 Brest-Cedex
3, France
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146
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Kumar S, Mani G, Dutta D, Mishra S. Structural Diversity of Copper(I) Complexes Formed by Pyrrole- and Dipyrrolylmethane-Based Diphosphine Ligands with Cu–X···HN Hydrogen Bonds. Inorg Chem 2014; 53:700-9. [PMID: 24392950 DOI: 10.1021/ic402253y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Shanish Kumar
- Department
of Chemistry, Indian Institute of Technology − Kharagpur, Kharagpur, West Bengal, India 721 302
| | - Ganesan Mani
- Department
of Chemistry, Indian Institute of Technology − Kharagpur, Kharagpur, West Bengal, India 721 302
| | - Debodyuti Dutta
- Department
of Chemistry, Indian Institute of Technology − Kharagpur, Kharagpur, West Bengal, India 721 302
| | - Sabyashachi Mishra
- Department
of Chemistry, Indian Institute of Technology − Kharagpur, Kharagpur, West Bengal, India 721 302
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147
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Hulley EB, Helm ML, Bullock RM. Heterolytic cleavage of H2 by bifunctional manganese(i) complexes: impact of ligand dynamics, electrophilicity, and base positioning. Chem Sci 2014. [DOI: 10.1039/c4sc01801j] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A balance of metal electrophilicity and ligand steric influences is required for facile, reversible H–H heterolytic cleavage in Mn complexes with pendant amines.
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Affiliation(s)
- Elliott B. Hulley
- Center for Molecular Electrocatalysis
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland, USA
| | - Monte L. Helm
- Center for Molecular Electrocatalysis
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland, USA
| | - R. Morris Bullock
- Center for Molecular Electrocatalysis
- Physical Sciences Division
- Pacific Northwest National Laboratory
- Richland, USA
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148
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Dydio P, Reek JNH. Supramolecular control of selectivity in transition-metal catalysis through substrate preorganization. Chem Sci 2014. [DOI: 10.1039/c3sc53505c] [Citation(s) in RCA: 157] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
The Perspective highlights possibilities to use supramolecular interactions between a substrate molecule and a (bifunctional) catalyst as a powerful tool to control the selectivity in transition-metal catalysis.
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Affiliation(s)
- Paweł Dydio
- Homogeneous, Supramolecular and Bio-Inspired Catalysis, van't Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1098 XH Amsterdam, The Netherlands
| | - Joost N. H. Reek
- Homogeneous, Supramolecular and Bio-Inspired Catalysis, van't Hoff Institute for Molecular Sciences
- University of Amsterdam
- 1098 XH Amsterdam, The Netherlands
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149
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Wang WH, Himeda Y, Muckerman JT, Fujita E. Interconversion of CO2/H2 and Formic Acid Under Mild Conditions in Water. ADVANCES IN INORGANIC CHEMISTRY 2014. [DOI: 10.1016/b978-0-12-420221-4.00006-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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150
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Kuwata S, Ikariya T. Metal–ligand bifunctional reactivity and catalysis of protic N-heterocyclic carbene and pyrazole complexes featuring β-NH units. Chem Commun (Camb) 2014; 50:14290-300. [DOI: 10.1039/c4cc04457f] [Citation(s) in RCA: 132] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The metal–ligand bifunctional cooperation of protic N-heterocyclic carbene and pyrazole complexes bearing an NH unit at the position β to the metal is surveyed.
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Affiliation(s)
- Shigeki Kuwata
- Department of Applied Chemistry
- Graduate School of Science and Engineering
- Tokyo Institute of Technology
- Tokyo, Japan
| | - Takao Ikariya
- Department of Applied Chemistry
- Graduate School of Science and Engineering
- Tokyo Institute of Technology
- Tokyo, Japan
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