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Lutz MDR, Zhong H, Trapp N, Morandi B. Synthesis and Reversible H
2
Activation by Coordinatively Unsaturated Rhodium NHC Complexes. Helv Chim Acta 2023. [DOI: 10.1002/hlca.202200199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Affiliation(s)
- Marius D. R. Lutz
- Laboratorium für Organische Chemie ETH Zürich CH-8093 Zürich Switzerland
| | - Hongyu Zhong
- Laboratorium für Organische Chemie ETH Zürich CH-8093 Zürich Switzerland
| | - Nils Trapp
- Laboratorium für Organische Chemie ETH Zürich CH-8093 Zürich Switzerland
| | - Bill Morandi
- Laboratorium für Organische Chemie ETH Zürich CH-8093 Zürich Switzerland
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2
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Camara F, Gavaggio T, Dautreppe B, Chauvin J, Pécaut J, Aldakov D, Collomb MN, Fortage J. Electrochemical Properties of a Rhodium(III) Mono-Terpyridyl Complex and Use as a Catalyst for Light-Driven Hydrogen Evolution in Water. Molecules 2022; 27:molecules27196614. [PMID: 36235152 PMCID: PMC9571878 DOI: 10.3390/molecules27196614] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/23/2022] [Accepted: 09/30/2022] [Indexed: 11/16/2022] Open
Abstract
Molecular hydrogen (H2) is considered one of the most promising fuels to decarbonize the industrial and transportation sectors, and its photocatalytic production from molecular catalysts is a research field that is still abounding. The search for new molecular catalysts for H2 production with simple and easily synthesized ligands is still ongoing, and the terpyridine ligand with its particular electronic and coordination properties, is a good candidate to design new catalysts meeting these requirements. Herein, we have isolated the new mono-terpyridyl rhodium complex, [RhIII(tpy)(CH3CN)Cl2](CF3SO3) (Rh-tpy), and shown that it can act as a catalyst for the light-induced proton reduction into H2 in water in the presence of the [Ru(bpy)3]Cl2 (Ru) photosensitizer and ascorbate as sacrificial electron donor. Under photocatalytic conditions, in acetate buffer at pH 4.5 with 0.1 M of ascorbate and 530 μM of Ru, the Rh-tpy catalyst produces H2 with turnover number versus catalyst (TONCat*) of 300 at a Rh concentration of 10 μM, and up to 1000 at a concentration of 1 μM. The photocatalytic performance of Ru/Rh-tpy/HA-/H2A has been also compared with that obtained with the bis-dimethyl-bipyridyl complex [RhIII(dmbpy)2Cl2]+ (Rh2) as a catalyst in the same experimental conditions. The investigation of the electrochemical properties of Rh-tpy in DMF solvent reveals that the two-electrons reduced state of the complex, the square-planar [RhI(tpy)Cl] (RhI-tpy), is quantitatively electrogenerated by bulk electrolysis. This complex is stable for hours under an inert atmosphere owing to the π-acceptor property of the terpyridine ligand that stabilizes the low oxidation states of the rhodium, making this catalyst less prone to degrade during photocatalysis. The π-acceptor property of terpyridine also confers to the Rh-tpy catalyst a moderately negative reduction potential (Epc(RhIII/RhI) = -0.83 V vs. SCE in DMF), making possible its reduction by the reduced state of Ru, [RuII(bpy)(bpy•-)]+ (Ru-) (E1/2(RuII/Ru-) = -1.50 V vs. SCE) generated by a reductive quenching of the Ru excited state (*Ru) by ascorbate during photocatalysis. A Stern-Volmer plot and transient absorption spectroscopy confirmed that the first step of the photocatalytic process is the reductive quenching of *Ru by ascorbate. The resulting reduced Ru species (Ru-) were then able to activate the RhIII-tpy H2-evolving catalyst by reduction generating RhI-tpy, which can react with a proton on a sub-nanosecond time scale to form a RhIII(H)-tpy hydride, the key intermediate for H2 evolution.
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Affiliation(s)
- Fakourou Camara
- DCM, CNRS, Université Grenoble Alpes, 38000 Grenoble, France
- SyMMES, IRIG, CEA, CNRS, Université Grenoble Alpes, 38000 Grenoble, France
| | - Thomas Gavaggio
- DCM, CNRS, Université Grenoble Alpes, 38000 Grenoble, France
| | | | - Jérôme Chauvin
- DCM, CNRS, Université Grenoble Alpes, 38000 Grenoble, France
| | - Jacques Pécaut
- SyMMES, IRIG, CEA, CNRS, Université Grenoble Alpes, 38000 Grenoble, France
| | - Dmitry Aldakov
- SyMMES, IRIG, CEA, CNRS, Université Grenoble Alpes, 38000 Grenoble, France
| | - Marie-Noëlle Collomb
- DCM, CNRS, Université Grenoble Alpes, 38000 Grenoble, France
- Correspondence: (M.-N.C.); (J.F.)
| | - Jérôme Fortage
- DCM, CNRS, Université Grenoble Alpes, 38000 Grenoble, France
- Correspondence: (M.-N.C.); (J.F.)
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3
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Anafcheh M, Zahedi M. Sustainable conversion of carbon dioxide to formic acid with Rh-decorated phosphorous-doped fullerenes: a theoretical study. Struct Chem 2020. [DOI: 10.1007/s11224-020-01621-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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4
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Castillo CE, Stoll T, Sandroni M, Gueret R, Fortage J, Kayanuma M, Daniel C, Odobel F, Deronzier A, Collomb MN. Electrochemical Generation and Spectroscopic Characterization of the Key Rhodium(III) Hydride Intermediates of Rhodium Poly(bipyridyl) H2-Evolving Catalysts. Inorg Chem 2018; 57:11225-11239. [PMID: 30129361 DOI: 10.1021/acs.inorgchem.8b01811] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | - Thibaut Stoll
- Univ. Grenoble Alpes, CNRS, DCM, F-38000 Grenoble, France
| | - Martina Sandroni
- Univ. Grenoble Alpes, CNRS, DCM, F-38000 Grenoble, France
- Univ. Grenoble Alpes, CEA, CNRS, INAC-SyMMES 38000 Grenoble, France
| | - Robin Gueret
- Univ. Grenoble Alpes, CNRS, DCM, F-38000 Grenoble, France
| | - Jérôme Fortage
- Univ. Grenoble Alpes, CNRS, DCM, F-38000 Grenoble, France
| | - Megumi Kayanuma
- Laboratoire de Chimie Quantique, Institut de Chimie Strasbourg, UMR 7177 CNRS/UdS, 1-4 Rue Blaise pascal, 67037 Strasbourg, France
| | - Chantal Daniel
- Laboratoire de Chimie Quantique, Institut de Chimie Strasbourg, UMR 7177 CNRS/UdS, 1-4 Rue Blaise pascal, 67037 Strasbourg, France
| | - Fabrice Odobel
- CEISAM, Université de Nantes, CNRS, 2 rue de la Houssinière, 44322 Nantes Cedex 3, France
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5
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Johnson SI, Gray HB, Blakemore JD, Goddard WA. Role of Ligand Protonation in Dihydrogen Evolution from a Pentamethylcyclopentadienyl Rhodium Catalyst. Inorg Chem 2017; 56:11375-11386. [DOI: 10.1021/acs.inorgchem.7b01698] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Samantha I. Johnson
- Center for Chemical
Innovation in Solar Fuels, California Institute of Technology, Pasadena, California 91125, United States
- Materials Research Center, California Institute of Technology, Pasadena, California 91125, United States
| | - Harry B. Gray
- Center for Chemical
Innovation in Solar Fuels, California Institute of Technology, Pasadena, California 91125, United States
| | - James D. Blakemore
- Department of Chemistry, University of Kansas, Lawrence, Kansas 66045-7582, United States
| | - William A. Goddard
- Materials Research Center, California Institute of Technology, Pasadena, California 91125, United States
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6
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Liu K, Zou M, Lei A. Aerobic Oxidative Carbonylation of Enamides by Merging Palladium with Photoredox Catalysis. J Org Chem 2016; 81:7088-92. [DOI: 10.1021/acs.joc.6b00965] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kun Liu
- College
of Chemistry and Molecular Sciences, the Institute for Advanced Studies
(IAS), Wuhan University, Wuhan 430072, China
| | - Minzhu Zou
- College
of Chemistry and Molecular Sciences, the Institute for Advanced Studies
(IAS), Wuhan University, Wuhan 430072, China
| | - Aiwen Lei
- College
of Chemistry and Molecular Sciences, the Institute for Advanced Studies
(IAS), Wuhan University, Wuhan 430072, China
- State
Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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Abstract
Transition metal hydride complexes are usually amphoteric, not only acting as hydride donors, but also as Brønsted-Lowry acids. A simple additive ligand acidity constant equation (LAC for short) allows the estimation of the acid dissociation constant Ka(LAC) of diamagnetic transition metal hydride and dihydrogen complexes. It is remarkably successful in systematizing diverse reports of over 450 reactions of acids with metal complexes and bases with metal hydrides and dihydrogen complexes, including catalytic cycles where these reactions are proposed or observed. There are links between pKa(LAC) and pKa(THF), pKa(DCM), pKa(MeCN) for neutral and cationic acids. For the groups from chromium to nickel, tables are provided that order the acidity of metal hydride and dihydrogen complexes from most acidic (pKa(LAC) -18) to least acidic (pKa(LAC) 50). Figures are constructed showing metal acids above the solvent pKa scales and organic acids below to summarize a large amount of information. Acid-base features are analyzed for catalysts from chromium to gold for ionic hydrogenations, bifunctional catalysts for hydrogen oxidation and evolution electrocatalysis, H/D exchange, olefin hydrogenation and isomerization, hydrogenation of ketones, aldehydes, imines, and carbon dioxide, hydrogenases and their model complexes, and palladium catalysts with hydride intermediates.
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Affiliation(s)
- Robert H Morris
- Department of Chemistry, University of Toronto , 80 Saint George Street, Toronto, Ontario M5S 3H6, Canada
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Mellmann D, Sponholz P, Junge H, Beller M. Formic acid as a hydrogen storage material – development of homogeneous catalysts for selective hydrogen release. Chem Soc Rev 2016; 45:3954-88. [DOI: 10.1039/c5cs00618j] [Citation(s) in RCA: 514] [Impact Index Per Article: 64.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Liquid energy: formic acid is an ideal candidate for catalytic release and storage of hydrogen.
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Stoll T, Castillo CE, Kayanuma M, Sandroni M, Daniel C, Odobel F, Fortage J, Collomb MN. Photo-induced redox catalysis for proton reduction to hydrogen with homogeneous molecular systems using rhodium-based catalysts. Coord Chem Rev 2015. [DOI: 10.1016/j.ccr.2015.02.002] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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10
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Rhodium complexes in homogeneous catalytic systems for oxidative functionalization of alkanes: Experiment and quantum-chemical calculations. J Organomet Chem 2015. [DOI: 10.1016/j.jorganchem.2015.03.021] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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Manbeck GF, Canterbury T, Zhou R, King S, Nam G, Brewer KJ. Electrocatalytic H2 Evolution by Supramolecular RuII–RhIII–RuII Complexes: Importance of Ligands as Electron Reservoirs and Speciation upon Reduction. Inorg Chem 2015; 54:8148-57. [DOI: 10.1021/acs.inorgchem.5b01536] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gerald F. Manbeck
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Theodore Canterbury
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Rongwei Zhou
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Skye King
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Geewoo Nam
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Karen J. Brewer
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
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Kagalwala HN, Maurer AB, Mills IN, Bernhard S. Visible-Light-Driven Alcohol Dehydrogenation with a Rhodium Catalyst. ChemCatChem 2014. [DOI: 10.1002/cctc.201402500] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Fabry DC, Zoller J, Raja S, Rueping M. Combining Rhodium and Photoredox Catalysis for CH Functionalizations of Arenes: Oxidative Heck Reactions with Visible Light. Angew Chem Int Ed Engl 2014; 53:10228-31. [DOI: 10.1002/anie.201400560] [Citation(s) in RCA: 138] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Indexed: 11/08/2022]
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14
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Fabry DC, Zoller J, Raja S, Rueping M. Kombinierte Rhodium- und Photoredoxkatalyse in der C-H-Funktionalisierung von Arenen: oxidative Heck-Reaktionen mit sichtbarem Licht. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201400560] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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15
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Chepaikin E. Oxidative functionalization of alkanes under dioxygen in the presence of homogeneous noble metal catalysts. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2013.11.028] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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16
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Smith DA, Herbert DE, Walensky JR, Ozerov OV. Monomeric Rhodium(II) Complexes Supported by a Diarylamido/Bis(phosphine) PNP Pincer Ligand and Their Reactivity Toward Dihydrogen. Organometallics 2013. [DOI: 10.1021/om300760j] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Dan A. Smith
- Department of Chemistry, Texas A&M University, 3255 TAMU, College Station, Texas 77842, United States
| | - David E. Herbert
- Department of Chemistry, Texas A&M University, 3255 TAMU, College Station, Texas 77842, United States
| | - Justin R. Walensky
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211, United States
| | - Oleg V. Ozerov
- Department of Chemistry, Texas A&M University, 3255 TAMU, College Station, Texas 77842, United States
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Szajna-Fuller E, Bakac A. Kinetics and mechanism of the reduction of a macrocyclic Rh(III) complex by chromium(II) ions: pH-controlled selectivity to rhodium(II) vs. rhodium(III) hydride. Dalton Trans 2011; 40:10598-602. [PMID: 21796299 DOI: 10.1039/c1dt10747j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aqueous chromium(II) ions reduce a macrocyclic Rh(III) complex L(1)(H(2)O)(2)Rh(3+) (L(1) = 1,4,8,11-tetraazacyclotetradecane) to the hydride L(1)(H(2)O)RhH(2+) in two discrete, one-electron steps. The first step generates L(1)(H(2)O)Rh(2+) with kinetics that are first order in each rhodium(III) complex and Cr(H(2)O)(6)(2+), and inverse in [H(+)], k/M(-1) s(-1) = 0.065/(0.0031 + [H(+)]). Further reduction of L(1)(H(2)O)Rh(2+) to L(1)(H(2)O)RhH(2+) is kinetically independent of [H(+)], k/M(-1) s(-1) = 0.30. The difference in [H(+)] dependence allows relative rates of the two steps to be manipulated to generate either L(1)(H(2)O)Rh(2+) or L(1)(H(2)O)RhH(2+) as the final product.
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Ohlmann DM, Gooßen LJ, Dierker M. Regioselective Synthesis of β-Aryl- and β-Amino-Substituted Aliphatic Esters by Rhodium-Catalyzed Tandem Double-Bond Migration/Conjugate Addition. Chemistry 2011; 17:9508-19. [DOI: 10.1002/chem.201100654] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2011] [Revised: 05/13/2011] [Indexed: 11/10/2022]
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Pestovsky O, Veysey SW, Bakac A. Kinetics and mechanism of hydrogen-atom abstraction from rhodium hydrides by alkyl radicals in aqueous solutions. Chemistry 2011; 17:4518-22. [PMID: 21438044 DOI: 10.1002/chem.201100094] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Indexed: 11/10/2022]
Abstract
The kinetics of the reaction of benzyl radicals with [L(1)(H(2)O)RhH{D}](2+) (L(1)=1,4,8,11-tetraazacyclotetradecane) were studied directly by laser-flash photolysis. The rate constants for the two isotopologues, k=(9.3±0.6) × 10(7) M(-1) s(-1) (H) and (6.2±0.3) × 10(7) M(-1) s(-1) (D), lead to a kinetic isotope effect k(H)/k(D)=1.5±0.1. The same value was obtained from the relative yields of PhCH(3) and PhCH(2)D in a reaction of benzyl radicals with a mixture of rhodium hydride and deuteride. Similarly, the reaction of methyl radicals with {[L(1)(H(2)O)RhH](2+) + [L(1)(H(2)O)RhD](2+)} produced a mixture of CH(4) and CH(3)D that yielded k(H)/k(D)=1.42±0.07. The observed small normal isotope effects in both reactions are consistent with reduced sensitivity to isotopic substitution in very fast hydrogen-atom abstraction reactions. These data disprove a literature report claiming much slower kinetics and an inverse kinetic isotope effect for the reaction of methyl radicals with hydrides of L(1)Rh.
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Affiliation(s)
- Oleg Pestovsky
- Ames Laboratory, Iowa State University, Ames, IA 50011, USA.
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Venediktov AB, Vasilchenko DB, Yushina IV, Nedoseykina TI, Filatov EY, Korenev SV. Solid-phase room-temperature decomposition of a complex salt trans-[Rh(γ-Pic)4Cl2]MnO4. Polyhedron 2011. [DOI: 10.1016/j.poly.2011.01.025] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Creutz C, Chou MH, Hou H, Muckerman JT. Hydride Ion Transfer from Ruthenium(II) Complexes in Water: Kinetics and Mechanism. Inorg Chem 2010; 49:9809-22. [DOI: 10.1021/ic101124q] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Carol Creutz
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Mei H. Chou
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
| | - Hua Hou
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China
| | - James T. Muckerman
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000, United States
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22
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Kang SB, Cho YS, Hwang SG. Density Functional Theoretical Study on the Hydricities of Transition Metal Hydride Complexes in Water. B KOREAN CHEM SOC 2009. [DOI: 10.5012/bkcs.2009.30.12.2927] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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Szajna-Fuller E, Bakac A. Base-Catalyzed Insertion of Dioxygen into Rhodium−Hydrogen Bonds: Kinetics and Mechanism. Inorg Chem 2009; 49:781-5. [DOI: 10.1021/ic901808t] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Andreja Bakac
- Ames Laboratory, Iowa State University, Ames, Iowa 50011
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24
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Affiliation(s)
- Carol Creutz
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000
| | - Mei H. Chou
- Chemistry Department, Brookhaven National Laboratory, Upton, New York 11973-5000
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Jiang B, Feng Y, Ison EA. Mechanistic investigations of the iridium(III)-catalyzed aerobic oxidation of primary and secondary alcohols. J Am Chem Soc 2008; 130:14462-4. [PMID: 18841968 DOI: 10.1021/ja8049595] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The commercially available catalysts [(Cp*IrCl2)2] is employed with O2 as the terminal oxidant in the presence of catalytic amounts of Et3N for the aerobic oxidation of primary and secondary alcohols. A new mechanism for the Ir-catalyzed aerobic oxidation is also presented that suggests that the transition metal maintains its +3 oxidation state throughout the entire catalytic cycle.
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Affiliation(s)
- Bi Jiang
- Department of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695-8204, USA
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Bolaño S, Albinati A, Bravo J, Caporali M, Gonsalvi L, Male L, Mar Rodríguez-Rocha M, Rossin A, Peruzzini M. Synthesis and reactivity of rhodium(III) pentamethylcyclopentadienyl complexes of N–B–PTA(BH3): X-ray crystal structures of [Cp∗RhCl2{N–B}–PTA(BH3)] and [Cp∗Rh{N–B–PTA(BH3)}(η2-CH2=CHPh)]. J Organomet Chem 2008. [DOI: 10.1016/j.jorganchem.2008.04.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Fukuzumi S, Kobayashi T, Suenobu T. Efficient catalytic decomposition of formic acid for the selective generation of H2 and H/D exchange with a water-soluble rhodium complex in aqueous solution. CHEMSUSCHEM 2008; 1:827-834. [PMID: 18846597 DOI: 10.1002/cssc.200800147] [Citation(s) in RCA: 152] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Formic acid (HCOOH) decomposes efficiently to afford H2 and CO2 selectively in the presence of a catalytic amount of a water-soluble rhodium aqua complex, [Rh(III)(Cp*)(bpy)(H2O)]2+ (Cp*=pentamethylcyclopentadienyl, bpy=2,2'-bipyridine) in aqueous solution at 298 K. No CO was produced in this catalytic decomposition of HCOOH. The decomposition rate reached a maximum value at pH 3.8. No deterioration of the catalyst was observed during the catalytic decomposition of HCOOH, and the catalytic activity remained the same for the repeated addition of HCOOH. The rhodium-hydride complex was detected as the catalytic active species that undergoes efficient H/D exchange with water. When the catalytic decomposition of HCOOH was performed in D2O, D2 was produced selectively. Such an efficient H/D exchange and the observation of a deuterium kinetic isotope effect in the catalytic decomposition of DCOOH in H2O provide valuable mechanistic insight into this efficient and selective decomposition process.
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Affiliation(s)
- Shunichi Fukuzumi
- Department of Material and Life Science, Graduate School of Engineering, Osaka University, SORST (Japan) Science and Technology Agency (JST), 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan.
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