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Crumpton AE, Heilmann A, Aldridge S. Modulating Hydrogen Shuttling in Ammonia by Neutral and Cationic Boron-Containing Frustrated Lewis Pairs (FLPs). Angew Chem Int Ed Engl 2024; 63:e202406440. [PMID: 38818696 DOI: 10.1002/anie.202406440] [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: 04/04/2024] [Revised: 05/27/2024] [Accepted: 05/28/2024] [Indexed: 06/01/2024]
Abstract
Xanthene-backbone FLPs featuring secondary borane functions -B(ArX)H (where ArX=C6F5 (ArF) or C6Cl5 (ArCl)) have been targeted through reactions of the dihydroboranes Me2S ⋅ BArXH2 with [4,5-xanth(PR2)Li]2 (R=Ph, iPr), and investigated in the synthesis of related cationic systems via hydride abstraction. The reactivity of these systems (both cationic and charge neutral) with ammonia have been probed, with a view to probing the potential for proton shuttling via N-H bond 'activation.' We find that in the case of four-coordinate boron systems (cationic or change neutral), the N-H linkage remains intact, supported by a NH⋅⋅⋅P hydrogen bond which is worth up to 17 kcal mol-1 thermodynamically, and enabled by planarization of the flexible xanthene scaffold. For cationic three coordinate systems, N-to-P proton transfer is viable, driven by the ability of the boron centre to stabilise the [NH2]- conjugate base through N-to-B π bonding. This proton transfer can be shown to be reversible in the presence of excess ammonia, depending on the nature of the B-bound ArX group. It is viable in the case of C6F5 substituents, but is prevented by the more sterically encumbering and secondary donor-stabilising capabilities of the C6Cl5 substituent.
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Affiliation(s)
- Agamemnon E Crumpton
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
| | - Andreas Heilmann
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
| | - Simon Aldridge
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
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2
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Krämer F, Paradies J, Fernández I, Breher F. A crystalline aluminium-carbon-based ambiphile capable of activation and catalytic transfer of ammonia in non-aqueous media. Nat Chem 2024; 16:63-69. [PMID: 37770550 DOI: 10.1038/s41557-023-01340-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Accepted: 08/31/2023] [Indexed: 09/30/2023]
Abstract
Despite recent achievements in the field of frustrated Lewis pairs (FLPs) for small molecule activations, the reversible activation and catalytic transformations of N-H-activated ammonia remain a challenge. Here we report on a rare combination of an aluminium Lewis acid and a carbon Lewis base. A so-called hidden FLP consisting of a phosphorus ylide featuring an aluminium fragment in the ortho position of a phenyl ring scaffold is introduced. Although the formation of the Lewis acid/base adduct is observed in the solid state, which at first glance leads to formally quenched FLP reactivity, we show that the title compound readily reacts with non-aqueous ammonia thermoneutrally and splits the N-H bond reversibly at ambient temperature. In addition, NH3 transfer reactions mediated by a main-group catalyst are presented. This proof-of-principle study is expected to initiate further activities in utilizing N-H-activated ammonia as a readily available, atom-economical nitrogen source.
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Affiliation(s)
- Felix Krämer
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany
| | - Jan Paradies
- Chemistry Department, Paderborn University, Paderborn, Germany
| | - Israel Fernández
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas and Centro de Innovación en Química Avanzada, Universidad Complutense de Madrid, Madrid, Spain
| | - Frank Breher
- Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany.
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3
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Wang Y, Tran PM, Lahm ME, Xie Y, Wei P, Adams ER, Glushka JN, Ren Z, Popik VV, Schaefer HF, Robinson GH. Activation of Ammonia by a Carbene-Stabilized Dithiolene Zwitterion. J Am Chem Soc 2022; 144:16325-16331. [PMID: 36037279 DOI: 10.1021/jacs.2c07920] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A carbene-stabilized dithiolene zwitterion (3) activates ammonia, affording 4• and 5, through both single-electron transfer (SET) and hydrogen atom transfer (HAT). Reaction products were characterized spectroscopically and by single-crystal X-ray diffraction. The mechanism of the formation of 4• and 5 was probed by experimental and computational methods. This discovery is the first example of metal-free ammonia activation via HAT.
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Affiliation(s)
- Yuzhong Wang
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Phuong M Tran
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Mitchell E Lahm
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Yaoming Xie
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Pingrong Wei
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Earle R Adams
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - John N Glushka
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Zichun Ren
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Vladimir V Popik
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Henry F Schaefer
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
| | - Gregory H Robinson
- Department of Chemistry, Center for Computational Chemistry, and Complex Carbohydrate Research Center, The University of Georgia, Athens, Georgia 30602-2556, United States
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4
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Yue C, Gu L, Zhang Z, Wei X, Yang H. Nickel- and Cobalt-based Heterogeneous Catalytic Systems for Selective Primary Amination of Alcohol with Ammonia. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.103865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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5
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Abbenseth J, Townrow OPE, Goicoechea JM. Thermoneutral N−H Bond Activation of Ammonia by a Geometrically Constrained Phosphine. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202111017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Josh Abbenseth
- Department of Chemistry University of Oxford 12 Mansfield Road OX1 3TA Oxford UK
| | - Oliver P. E. Townrow
- Department of Chemistry University of Oxford 12 Mansfield Road OX1 3TA Oxford UK
| | - Jose M. Goicoechea
- Department of Chemistry University of Oxford 12 Mansfield Road OX1 3TA Oxford UK
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6
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Abbenseth J, Townrow OPE, Goicoechea JM. Thermoneutral N-H Bond Activation of Ammonia by a Geometrically Constrained Phosphine. Angew Chem Int Ed Engl 2021; 60:23625-23629. [PMID: 34478227 PMCID: PMC8596738 DOI: 10.1002/anie.202111017] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Indexed: 01/07/2023]
Abstract
A geometrically constrained phosphine bearing a tridentate NNS pincer ligand is reported. The effect of the geometric constraint on the electronic structure was probed by theoretical calculations and derivatization reactions. Reactions with N-H bonds result in formation of cooperative addition products. The thermochemistry of these transformations is strongly dependent on the substrate, with ammonia activation being thermoneutral. This represents the first example of a molecular compound that reversibly activates ammonia via N-H bond scission in solution upon mild heating.
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Affiliation(s)
- Josh Abbenseth
- Department of ChemistryUniversity of Oxford12 Mansfield RoadOX1 3TAOxfordUK
| | | | - Jose M. Goicoechea
- Department of ChemistryUniversity of Oxford12 Mansfield RoadOX1 3TAOxfordUK
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7
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Yeung CF, Shek HL, Yiu SM, Tse MK, Wong CY. Controlled Activation of Dipicolinyl-Substituted Propargylic Alcohol by Ru(II) and Os(II) for Unprecedented Indolizine-Fused Metallafuran Complexes. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00197] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Chi-Fung Yeung
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
- State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Hau-Lam Shek
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Shek-Man Yiu
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Man-Kit Tse
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
| | - Chun-Yuen Wong
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
- State Key Laboratory of Terahertz and Millimeter Waves, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR
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Hollenhorst H, McDonald R, Ferguson M, Turculet L. Synthesis of Rhodium and Iridium Complexes Supported by Bis(indolylphosphino)silyl Pincer Ligation: Competitive N–H and C–H Bond Activation by an Ir(I) Species. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Helia Hollenhorst
- Department of Chemistry, Dalhousie University, 6274 Coburg Road, P.O. Box 15000, Halifax, Nova Scotia B3H 4R2, Canada
| | - Robert McDonald
- X-ray Crystallography Laboratory, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Michael Ferguson
- X-ray Crystallography Laboratory, Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
| | - Laura Turculet
- Department of Chemistry, Dalhousie University, 6274 Coburg Road, P.O. Box 15000, Halifax, Nova Scotia B3H 4R2, Canada
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Abstract
Since the prediction of the existence of metallabenzenes in 1979, metallaaromatic chemistry has developed rapidly, due to its importance in both experimental and theoretical fields. Now six major types of metallaromatic compounds, metallabenzenes, metallabenzynes, heterometallaaromatics, dianion metalloles, metallapentalenes and metallapentalynes (also termed carbolongs), and spiro metalloles, have been reported and extensively studied. Their parent organic analogues may be aromatic, non-aromatic, or even anti-aromatic. These unique systems not only enrich the large family of aromatics, but they also broaden our understanding and extend the concept of aromaticity. This review provides a comprehensive overview of metallaaromatic chemistry. We have focused on not only the six major classes of metallaaromatics, including the main-group-metal-based metallaaromatics, but also other types, such as metallacyclobutadienes and metallacyclopropenes. The structures, synthetic methods, and reactivities are described, their applications are covered, and the challenges and future prospects of the area are discussed. The criteria commonly used to judge the aromaticity of metallaaromatics are presented.
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Affiliation(s)
- Dafa Chen
- Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis, Department of Chemistry, Southern University of Science and Technology, Shenzhen, People's Republic of China
| | - Yuhui Hua
- Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis, Department of Chemistry, Southern University of Science and Technology, Shenzhen, People's Republic of China.,State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
| | - Haiping Xia
- Shenzhen Grubbs Institute and Guangdong Provincial Key Laboratory of Catalysis, Department of Chemistry, Southern University of Science and Technology, Shenzhen, People's Republic of China.,State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials (iChEM), College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China
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Yeung C, Chung L, Ng S, Shek H, Tse S, Chan S, Tse M, Yiu S, Wong C. Phosphonium‐Ring‐Fused Bicyclic Metallafuran Complexes of Ruthenium and Osmium. Chemistry 2019; 25:9159-9163. [DOI: 10.1002/chem.201901080] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 04/26/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Chi‐Fung Yeung
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong SAR P.R. China
- State Key Laboratory of Terahertz and Millimeter WavesCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong SAR P.R. China
| | - Lai‐Hon Chung
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong SAR P.R. China
| | - Sze‐Wing Ng
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong SAR P.R. China
- State Key Laboratory of Terahertz and Millimeter WavesCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong SAR P.R. China
| | - Hau‐Lam Shek
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong SAR P.R. China
| | - Sheung‐Ying Tse
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong SAR P.R. China
| | - Siu‐Chung Chan
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong SAR P.R. China
| | - Man‐Kit Tse
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong SAR P.R. China
| | - Shek‐Man Yiu
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong SAR P.R. China
| | - Chun‐Yuen Wong
- Department of ChemistryCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong SAR P.R. China
- State Key Laboratory of Terahertz and Millimeter WavesCity University of Hong Kong Tat Chee Avenue, Kowloon Hong Kong SAR P.R. China
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11
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Vivancos Á, Petronilho A, Cardoso J, Müller-Bunz H, Albrecht M. Unveiling the role of ancillary ligands in acceptorless benzyl alcohol dehydrogenation and etherification mediated by mesoionic carbene iridium complexes. Dalton Trans 2017; 47:74-82. [PMID: 29200225 DOI: 10.1039/c7dt04109h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We synthesized a set of triazolylidene iridium(iii) complexes [IrCp*(C^N)L]n+ (Cp* = pentamethylcyclopentadienyl, C^N = C,N-bidentate coordinating pyridyl-triazolylidene) containing different neutral or anionic ancillary ligands L and evaluated their impact on the catalytic activity in alcohol conversion. We demonstrate that these ancillary ligands have a strong influence on the catalytic selectivity and direct whether the iridium center preferentially catalyzes either the dehydrogenation or the dehydration of benzyl alcohol. Ligand exchange experiments provide a direct correlation of ligand lability with catalytic activity and selectivity. These results underline the relevance of ancillary ligands and provide a rational approach to tailor the catalytic activity of the iridium center towards aldehyde formation (loss of H2) or etherification (elimination of H2O).
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Affiliation(s)
- Ángela Vivancos
- Departement für Chemie und Biochemie, Universität Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
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12
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Mena I, García-Orduña P, Polo V, Lahoz FJ, Casado MA, Oro LA. Reactivity of the parent amido complexes of iridium with olefins: C-NH 2 bond formation versus C-H activation. Dalton Trans 2017; 46:11459-11468. [PMID: 28820211 DOI: 10.1039/c7dt01924f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein we report on the different chemical reactivity displayed by two mononuclear terminal amido compounds depending on the nature of the coordinated diene. Hence, treatment of amido-bridged iridium complexes [{Ir(μ-NH2)(tfbb)}3] (1; tfbb = tetrafluorobenzobarrelene) with dppp (dppp = bis(diphenylphosphane)propane) leads to the rupture of the amido bridges forming the mononuclear terminal amido compound [Ir(NH2)(dppp)(tfbb)] (3) in the first stage. On changing the reaction conditions, the formation of a C-NH2 bond between the amido moiety and the coordinated diene is observed and a new dinuclear complex [{Ir(1,2-η2-4-κ-C12H8F4N)(dppp)}2(μ-dppp)] (4) has been isolated. On the contrary, the diiridium amido-bridged complex [{Ir(μ-NH2)(cod)}2] (2; cod = 1,5-cyclooctadiene) in the presence of dppb (dppb = bis(diphenylphosphane)butane) allows the isolation of a mononuclear complex [Ir(1,2,3-η3-6-κ-C8H10)H(dppb)] (5), as a consequence of the extrusion of ammonia. The monitoring of the reaction of 2 with dppb (and dppp) allowed us to detect terminal amido complexes [Ir(NH2)(P-P)(cod)] (P-P = dppb (6), dppp (7)) in solution, as confirmed by an X-ray analysis of 7. Complex 7 was observed to evolve into hydrido species 5 at room temperature. DFT studies showed that C-H bond activation occurs through the deprotonation of one methylene fragment of the cod ligand by the highly basic terminal amido moiety instead of C-H oxidative addition to the Ir(i) center.
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Affiliation(s)
- Inmaculada Mena
- Instituto de Síntesis Química y Catálisis Homogénea ISQCH, Universidad de Zaragoza-CSIC, C/Pedro Cerbuna, 12, 50009, Zaragoza, Spain.
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13
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Baumgarth H, Meier G, Braun T, Braun‐Cula B. Rhodium and Iridium Fluorido and Bifluorido Complexes Derived from Peroxido Precursors. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600682] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hanna Baumgarth
- Humboldt‐Universität zu BerlinDepartment of ChemistryBrook‐Taylor‐Straße 212489BerlinGermany
| | - Gregor Meier
- Humboldt‐Universität zu BerlinDepartment of ChemistryBrook‐Taylor‐Straße 212489BerlinGermany
| | - Thomas Braun
- Humboldt‐Universität zu BerlinDepartment of ChemistryBrook‐Taylor‐Straße 212489BerlinGermany
| | - Beatrice Braun‐Cula
- Humboldt‐Universität zu BerlinDepartment of ChemistryBrook‐Taylor‐Straße 212489BerlinGermany
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14
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Betoré MP, Casado MA, García-Orduña P, Lahoz FJ, Polo V, Oro LA. Oxidative Addition of the N–H Bond of Ammonia to Iridium Bis(phosphane) Complexes: A Combined Experimental and Theoretical Study. Organometallics 2016. [DOI: 10.1021/acs.organomet.5b01014] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Pilar Betoré
- Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Miguel A. Casado
- Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Pilar García-Orduña
- Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Fernando J. Lahoz
- Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Víctor Polo
- Departamento
de Química Física and Instituto de Biocomputación
y Física de los Sistemas Complejos (BIFI), Universidad de Zaragoza, c/Pedro Cerbuna 12, 50009, Zaragoza, Spain
| | - Luis A. Oro
- Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, c/Pedro Cerbuna 12, 50009, Zaragoza, Spain
- Center of Research Excellence in Petroleum Refining & Petrochemicals, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia
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15
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16
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Wang DY, Choliy Y, Haibach MC, Hartwig JF, Krogh-Jespersen K, Goldman AS. Assessment of the Electronic Factors Determining the Thermodynamics of "Oxidative Addition" of C-H and N-H Bonds to Ir(I) Complexes. J Am Chem Soc 2015; 138:149-63. [PMID: 26652221 DOI: 10.1021/jacs.5b09522] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A study of electronic factors governing the thermodynamics of C-H and N-H bond addition to Ir(I) complexes was conducted. DFT calculations were performed on an extensive series of trans-(PH3)2IrXL complexes (L = NH3 and CO; X = various monodentate ligands) to parametrize the relative σ- and π-donating/withdrawing properties of the various ligands, X. Computed energies of oxidative addition of methane to a series of three- and four-coordinate Ir(I) complexes bearing an ancillary ligand, X, were correlated with the resulting (σ(X), π(X)) parameter set. Regression analysis indicates that the thermodynamics of addition of methane to trans-(PH3)2IrX are generally strongly disfavored by increased σ-donation from the ligand X, in contradiction to widely held views on oxidative addition. The trend for oxidative addition of methane to four-coordinate Ir(I) was closely related to that observed for the three-coordinate complexes, albeit slightly more complicated. The computational analysis was found to be consistent with the rates of reductive elimination of benzene from a series of isoelectronic Ir(III) phenyl hydride complexes, measured experimentally in this work and previously reported. Extending the analysis of ancillary ligand energetic effects to the oxidative addition of ammonia to three-coordinate Ir(I) complexes leads to the conclusion that increasing σ-donation by X also disfavors oxidative addition of N-H bonds to trans-(PH3)2IrX. However, coordination of NH3 to the Ir(I) center is disfavored even more strongly by increasing σ-donation by X, which explains why the few documented examples of H-NH2 oxidative addition to transition metals involve complexes with strongly σ-donating ligands situated trans to the site of addition. An orbital-based rationale for the observed results is presented.
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Affiliation(s)
- David Y Wang
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey , New Brunswick, New Jersey 08903, United States
| | - Yuriy Choliy
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey , New Brunswick, New Jersey 08903, United States
| | - Michael C Haibach
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey , New Brunswick, New Jersey 08903, United States
| | - John F Hartwig
- Department of Chemistry, University of California, Berkeley , Berkeley, California 94720-1460, United States
| | - Karsten Krogh-Jespersen
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey , New Brunswick, New Jersey 08903, United States
| | - Alan S Goldman
- Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey , New Brunswick, New Jersey 08903, United States
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Vélez E, Betoré MP, Casado MA, Polo V. N–H Activation of Ammonia by [{M(μ-OMe)(cod)}2] (M = Ir, Rh) Complexes: A DFT Study. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00419] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ederley Vélez
- Departamento
de Ciencias Básicas, Universidad de Medellín, Medellín, Colombia
| | - M. Pilar Betoré
- Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, Pl. S. Francisco S/N 50009, Zaragoza, Spain
| | - Miguel A. Casado
- Instituto
de Síntesis Química y Catálisis Homogénea
(ISQCH), Departamento de Química Inorgánica, CSIC-Universidad de Zaragoza, Pl. S. Francisco S/N 50009, Zaragoza, Spain
| | - Víctor Polo
- Departamento
de Química Física and Instituto de Biocomputación
y Física de los Sistemas Complejos (BIFI), Universidad de Zaragoza, Pl. S. Francisco S/N 50009, Zaragoza, Spain
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18
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Romero RM, Fra L, Lishchynskyi A, Martínez C, Streuff J, Muñiz K. Amidato complexes of ruthenium, rhodium and iridium from concise N–H bond activation: exploration in catalysis. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.03.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Baumgarth H, Braun T, Braun B, Laubenstein R, Herrmann R. Synthesis of an Iridium Peroxido Complex and Its Reactivity Towards Brønsted Acids. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500384] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hanna Baumgarth
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, Germany, http://www2.hu‐berlin.de/chemie/braun
| | - Thomas Braun
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, Germany, http://www2.hu‐berlin.de/chemie/braun
| | - Beatrice Braun
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, Germany, http://www2.hu‐berlin.de/chemie/braun
| | - Reik Laubenstein
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, Germany, http://www2.hu‐berlin.de/chemie/braun
| | - Roy Herrmann
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, Germany, http://www2.hu‐berlin.de/chemie/braun
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20
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Ladipo FT, Merola JS. Addition of N–H bonds to iridium: Synthesis and characterization of N–Ir–H complexes and the observation that an iridium N-bonded indole ring becomes activated for Michael addition to alkynes. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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21
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Kalläne SI, Teltewskoi M, Braun T, Braun B. C–H and C–F Bond Activations at a Rhodium(I) Boryl Complex: Reaction Steps for the Catalytic Borylation of Fluorinated Aromatics. Organometallics 2015. [DOI: 10.1021/om500952x] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Sabrina I. Kalläne
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Michael Teltewskoi
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Thomas Braun
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Beatrice Braun
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
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22
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Jia HP, Kaya Y, Chow C, Taoufik M, Quadrelli EA. C-H Bond Activation of Benzene, Toluene, 3,3-Dimethyl-1-butene and Methane by Silica-Supported Ta VImido Amido Surface Complex. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201400178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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23
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Calvo B, Roy B, Macías R, Artigas MJ, Lahoz FJ, Oro LA. NH3-promoted ligand lability in eleven-vertex rhodathiaboranes. Inorg Chem 2014; 53:12428-36. [PMID: 25382790 DOI: 10.1021/ic501779n] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The reaction of the 11-vertex rhodathiaborane, [8,8-(PPh3)2-nido-8,7-RhSB9H10] (1), with NH3 affords inmediately the adduct, [8,8,8-(NH3)(PPh3)2-nido-8,7-RhSB9H10] (4). The NH3-Rh interaction induces the labilization of the PPh3 ligands leading to the dissociation product, [8,8-(NH3)(PPh3)-nido-8,7-RhSB9H10] (5), which can then react with another molecule of NH3 to give [8,8,8-(NH3)2(PPh3)-nido-8,7-RhSB9H10] (6). These clusters have been characterized in situ by multielement NMR spectroscopy at different temeperatures. The variable temperature behavior of the system demonstrates that the intermediates 4-6 are in equilibrium, involving ligand exchange processes. On the basis of low intensity signals present in the (1)H NMR spectra of the reaction mixture, some species are tentatively proposed to be the bis- and tris-NH3 ligated clusters, [8,8-(NH3)2-nido-8,7-RhSB9H10] (7) and [8,8,8-(NH3)3-nido-8,7-RhSB9H10] (8). After evaporation of the solvent and the excess of NH3, the system containing species 4-8 regenerates the starting reactant, 1, thus closing a stoichiometric cycle of ammonia addition and loss. After 40 h at room temperature, the reaction of 1 with NH3 gives the hydridorhodathiaborane, [8,8,8-(H)(PPh3)2-nido-8,7-RhSB9H9] (2), as a single product. The reported rhodathiaboranes show reversible H3N-promoted ligand lability, which implies weak Rh-N interactions, leading to a rare case of metal complexes that circumvent "classical" Werner chemistry.
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Affiliation(s)
- Beatriz Calvo
- Departamento de Química Inorgánica, Instituto de Síntesis Química y Catálisis Homogénea, Universidad de Zaragoza-CSIC , 50009-Zaragoza, Spain
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24
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Cui J, Li Y, Ganguly R, Inthirarajah A, Hirao H, Kinjo R. Metal-free σ-bond metathesis in ammonia activation by a diazadiphosphapentalene. J Am Chem Soc 2014; 136:16764-7. [PMID: 25390290 DOI: 10.1021/ja509963m] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A diazadiphosphapentalene derivative 5 featuring a bent geometry with two phosphorus atoms at the bridgehead has been synthesized. Under mild conditions, compound 5 readily activated ammonia to afford 1-aza-2,3-diphospholene derivative 6 bearing an enamine group. The reaction is therefore viewed as a formal σ-bond metathesis between an N-H bond of ammonia and an endocyclic P-N bond of 5. Details of the reaction mechanism for ammonia activation as well as subsequent isomerization were explored by density functional theory calculations.
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Affiliation(s)
- Jingjing Cui
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, and ‡NTU-CBC Crystallography Facility, Nanyang Technological University , Singapore 637371, Singapore
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25
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Meier G, Steck V, Braun B, Eißler A, Herrmann R, Ahrens M, Laubenstein R, Braun T. Synthesis and Structures of Fluorinated (β‐Diketiminato)rhodium Complexes: Si–H Activation of Silanes at a Carbonyl Complex. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402087] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Gregor Meier
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Viktoria Steck
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Beatrice Braun
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Anna Eißler
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Roy Herrmann
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Mike Ahrens
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Reik Laubenstein
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
| | - Thomas Braun
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Straße 2, 12489 Berlin, http://www2.hu‐berlin.de/chemie/braun/
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26
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Hansen K, Szilvási T, Blom B, Irran E, Driess M. A Donor-Stabilized Zwitterionic “Half-Parent” Phosphasilene and Its Unusual Reactivity towards Small Molecules. Chemistry 2014; 20:1947-56. [DOI: 10.1002/chem.201303906] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Indexed: 11/06/2022]
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27
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Merola JS, Knorr JR. Synthesis and reaction chemistry of boryliridium hydride complexes formed by oxidative addition of catecholborane to iridium(I): Lessons for metal-catalyzed hydroboration. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2013.10.049] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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28
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Mena I, Casado MA, Polo V, García-Orduña P, Lahoz FJ, Oro LA. P–H activation of secondary phosphanes on a parent amido diiridium complex. Dalton Trans 2014; 43:1609-19. [DOI: 10.1039/c3dt52911h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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30
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Kläring P, Braun T. Insertion of CS2into Iridium-Fluorine Bonds. Angew Chem Int Ed Engl 2013; 52:11096-101. [DOI: 10.1002/anie.201305106] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Indexed: 01/22/2023]
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31
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Eiβler A, Kläring P, Emmerling F, Braun T. α‐Dialdimine Complexes of Rhodium(I) and Iridium(I): Their Reactivity with Dioxygen and Dihydrogen. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300625] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Anna Eiβler
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐7468, http://www2.hu‐berlin.de/chemie/braun/
| | - Paul Kläring
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐7468, http://www2.hu‐berlin.de/chemie/braun/
| | - Franziska Emmerling
- BAM Federal Institute for Materials Research and Testing, Richard‐Willstätter‐Str. 11, 12489 Berlin, Germany
| | - Thomas Braun
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐7468, http://www2.hu‐berlin.de/chemie/braun/
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32
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Mena I, Jaseer EA, Casado MA, García-Orduña P, Lahoz FJ, Oro LA. Terminal and Bridging Parent Amido 1,5-Cyclooctadiene Complexes of Rhodium and Iridium. Chemistry 2013; 19:5665-75. [DOI: 10.1002/chem.201204391] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Indexed: 11/05/2022]
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33
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Jungton AK, Herwig C, Braun T, Limberg C. Activation and Coordination of Ammonia at [Cp*Ir(H)2]: NMR and Matrix Isolation Studies. Chemistry 2012; 18:10009-13. [DOI: 10.1002/chem.201201295] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Indexed: 11/11/2022]
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34
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Mena I, Casado MA, Polo V, García-Orduña P, Lahoz FJ, Oro LA. The Dehydrogenation of Alcohols through a Concerted Bimetallic Mechanism Involving an Amido-Bridged Diiridium Complex. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201202936] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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35
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Mena I, Casado MA, Polo V, García-Orduña P, Lahoz FJ, Oro LA. The Dehydrogenation of Alcohols through a Concerted Bimetallic Mechanism Involving an Amido-Bridged Diiridium Complex. Angew Chem Int Ed Engl 2012; 51:8259-63. [DOI: 10.1002/anie.201202936] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2012] [Revised: 06/14/2012] [Indexed: 11/06/2022]
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36
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Kretschmer R, Schlangen M, Schwarz H. Thermal Ammonia Activation by Cationic Transition-Metal Hydrides of the First Row - Small but Mighty. Chem Asian J 2012; 7:1214-20. [DOI: 10.1002/asia.201101045] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Indexed: 11/09/2022]
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37
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Kläring P, Jungton AK, Braun T, Müller C. Synthesis, Structure and Reactivity of Iridium Hydrido Fluorido Complexes. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100917] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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38
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Kameo H, Nakajima Y, Namura K, Suzuki H. Heterometallic Effects in Nitrogen–Hydrogen Bond Cleavage by Trinuclear Mixed-Metal Polyhydrido Clusters Containing Ruthenium and Osmium. Organometallics 2011. [DOI: 10.1021/om200901j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hajime Kameo
- Department of Applied Chemistry,
Graduate School of
Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Yumiko Nakajima
- Department of Applied Chemistry,
Graduate School of
Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Kyo Namura
- Department of Applied Chemistry,
Graduate School of
Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Hiroharu Suzuki
- Department of Applied Chemistry,
Graduate School of
Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
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39
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Mena I, Casado MA, García-Orduña P, Polo V, Lahoz FJ, Fazal A, Oro LA. Direct access to parent amido complexes of rhodium and iridium through N-H activation of ammonia. Angew Chem Int Ed Engl 2011; 50:11735-8. [PMID: 21994125 DOI: 10.1002/anie.201104745] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2011] [Revised: 09/05/2011] [Indexed: 11/11/2022]
Affiliation(s)
- Inmaculada Mena
- Instituto de Síntesis Química y Catálisis Homogénea, Universidad de Zaragoza-CSIC, Pl. San Francisco s/n, 50009 Zaragoza, Spain
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40
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Mena I, Casado MA, García-Orduña P, Polo V, Lahoz FJ, Fazal A, Oro LA. Direct Access to Parent Amido Complexes of Rhodium and Iridium through NH Activation of Ammonia. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201104745] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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41
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Fortman GC, Slawin AMZ, Nolan SP. Highly Active Iridium(III)–NHC System for the Catalytic B–N Bond Activation and Subsequent Solvolysis of Ammonia–Borane. Organometallics 2011. [DOI: 10.1021/om2007437] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- George C. Fortman
- EaStCHEM School of Chemistry, University of St. Andrews, St Andrews, KY16 9ST, U.K
| | | | - Steven P. Nolan
- EaStCHEM School of Chemistry, University of St. Andrews, St Andrews, KY16 9ST, U.K
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42
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Aguado-Ullate S, Carbó JJ, González-del Moral O, Martín A, Mena M, Poblet JM, Santamaría C. Ammonia Activation by μ3-Alkylidyne Fragments Supported on a Titanium Molecular Oxide Model. Inorg Chem 2011; 50:6269-79. [DOI: 10.1021/ic2006327] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Sonia Aguado-Ullate
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Campus Sescelades, C/Marcel.lí Domingo, s/n. 43007 Tarragona, Spain
| | - Jorge J. Carbó
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Campus Sescelades, C/Marcel.lí Domingo, s/n. 43007 Tarragona, Spain
| | - Octavio González-del Moral
- Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares-Madrid, Spain
| | - Avelino Martín
- Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares-Madrid, Spain
| | - Miguel Mena
- Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares-Madrid, Spain
| | - Josep.-M. Poblet
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Campus Sescelades, C/Marcel.lí Domingo, s/n. 43007 Tarragona, Spain
| | - Cristina Santamaría
- Departamento de Química Inorgánica, Universidad de Alcalá, Campus Universitario, 28871 Alcalá de Henares-Madrid, Spain
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43
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Kimura T, Koiso N, Ishiwata K, Kuwata S, Ikariya T. H-H and N-H bond cleavage of dihydrogen and ammonia with a bifunctional parent imido (NH)-bridged diiridium complex. J Am Chem Soc 2011; 133:8880-3. [PMID: 21591681 DOI: 10.1021/ja203538b] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydrogenation and protonation of parent imido complexes have attracted much attention in relation to industrial and biological nitrogen fixation. The present study reports the structure and properties of the highly unsaturated diiridium parent imido complex [(Cp*Ir)(2)(μ(2)-H)(μ(2)-NH)](+) derived from deprotonation of a parent amido complex. Because of the Lewis acid-Brønsted base bifunctional nature of the metal-NH bond, the parent imido complex promotes heterolysis of H(2) and deprotonative N-H cleavage of ammonia to afford the corresponding parent amido complexes under mild conditions.
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Affiliation(s)
- Takashi Kimura
- Department of Applied Chemistry, Graduate School of Science and Engineering, Tokyo Institute of Technology, O-okayama, Tokyo 152-8552, Japan
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44
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Penner A, Braun T. Rhodium and Iridium Complexes with α‐Diketimine Ligands: Oxidative Addition of H
2
and O
2. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100135] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Anna Penner
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐6939
| | - Thomas Braun
- Humboldt‐Universität zu Berlin, Department of Chemistry, Brook‐Taylor‐Str. 2, 12489 Berlin, Germany, Fax: +49‐30‐2093‐6939
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45
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Meier G, Braun T. A Rhodium Peroxido Complex in Mono-, Di-, and Peroxygenation Reactions. Angew Chem Int Ed Engl 2011; 50:3280-4. [DOI: 10.1002/anie.201007315] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2010] [Indexed: 11/08/2022]
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46
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Meier G, Braun T. A Rhodium Peroxido Complex in Mono-, Di-, and Peroxygenation Reactions. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201007315] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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47
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Braun T, Wehmeier F. C–F Bond Activation of Highly Fluorinated Molecules at Rhodium: From Model Reactions to Catalysis. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201001184] [Citation(s) in RCA: 132] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Thomas Braun
- Humboldt‐Universität zu Berlin, Institut für Chemie, Brook‐Taylor‐Str. 2 12489 Berlin, Germany, Fax: +49‐30‐2093‐6966
| | - Falk Wehmeier
- Humboldt‐Universität zu Berlin, Institut für Chemie, Brook‐Taylor‐Str. 2 12489 Berlin, Germany, Fax: +49‐30‐2093‐6966
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48
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Kläring P, Pahl S, Braun T, Penner A. Facile oxidative addition of water at iridium: reactivity of trans-[Ir(4-C5NF4)(H)(OH)(PiPr3)2] towards CO2 and NH3. Dalton Trans 2011; 40:6785-91. [DOI: 10.1039/c1dt10173k] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Muñiz K, Lishchynskyi A, Streuff J, Nieger M, Escudero-Adán EC, Belmonte MM. Metal–ligand bifunctional activation and transfer of N–H bonds. Chem Commun (Camb) 2011; 47:4911-3. [DOI: 10.1039/c1cc10999e] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Bauer RC, Gloaguen Y, Lutz M, Reek JNH, de Bruin B, van der Vlugt JI. Pincer ligands with an all-phosphorus donor set: subtle differences between rhodium and palladium. Dalton Trans 2011; 40:8822-9. [DOI: 10.1039/c1dt10360a] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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