101
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Del Castillo TJ, Thompson NB, Suess DLM, Ung G, Peters JC. Evaluating molecular cobalt complexes for the conversion of N2 to NH3. Inorg Chem 2015; 54:9256-62. [PMID: 26001022 DOI: 10.1021/acs.inorgchem.5b00645] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Well-defined molecular catalysts for the reduction of N2 to NH3 with protons and electrons remain very rare despite decades of interest and are currently limited to systems featuring molybdenum or iron. This report details the synthesis of a molecular cobalt complex that generates superstoichiometric yields of NH3 (>200% NH3 per Co-N2 precursor) via the direct reduction of N2 with protons and electrons. While the NH3 yields reported herein are modest by comparison to those of previously described iron and molybdenum systems, they intimate that other metals are likely to be viable as molecular N2 reduction catalysts. Additionally, a comparison of the featured tris(phosphine)borane Co-N2 complex with structurally related Co-N2 and Fe-N2 species shows how remarkably sensitive the N2 reduction performance of potential precatalysts is. These studies enable consideration of the structural and electronic effects that are likely relevant to N2 conversion activity, including the π basicity, charge state, and geometric flexibility.
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Affiliation(s)
- Trevor J Del Castillo
- Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Niklas B Thompson
- Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Daniel L M Suess
- Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Gaël Ung
- Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Jonas C Peters
- Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
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102
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Saes BWH, Verhoeven DGA, Lutz M, Klein Gebbink RJM, Moret ME. Coordination of a Diphosphine–Ketone Ligand to Ni(0), Ni(I), and Ni(II): Reduction-Induced Coordination. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00264] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bartholomeus W. H. Saes
- Organic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Dide G. A. Verhoeven
- Organic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Martin Lutz
- Crystal
and Structural Chemistry, Bijvoet Center for Biomolecular Research,
Faculty of Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Robertus J. M. Klein Gebbink
- Organic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Marc-Etienne Moret
- Organic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
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103
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Parmelee SR, Mazzacano TJ, Zhu Y, Mankad NP, Keith JA. A Heterobimetallic Mechanism for C–H Borylation Elucidated from Experimental and Computational Data. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00275] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Sean R. Parmelee
- Department
of Chemistry, University of Illinois at Chicago, 845 West Taylor
Street, Chicago, Illinois 60607, United States
| | - Thomas J. Mazzacano
- Department
of Chemistry, University of Illinois at Chicago, 845 West Taylor
Street, Chicago, Illinois 60607, United States
| | - Yaqun Zhu
- Department of Chemical & Petroleum Engineering, University of Pittsburgh, 3700 O’Hara Street, Pittsburgh, Pennsylvania 15261, United States
| | - Neal P. Mankad
- Department
of Chemistry, University of Illinois at Chicago, 845 West Taylor
Street, Chicago, Illinois 60607, United States
| | - John A. Keith
- Department of Chemical & Petroleum Engineering, University of Pittsburgh, 3700 O’Hara Street, Pittsburgh, Pennsylvania 15261, United States
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104
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Field LD, Hazari N, Li HL. Nitrogen fixation revisited on iron(0) dinitrogen phosphine complexes. Inorg Chem 2015; 54:4768-76. [PMID: 25945866 DOI: 10.1021/acs.inorgchem.5b00211] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A reinvestigation of the treatment of [Fe(N2)(PP)2] (PP = depe, dmpe) with acid revealed no ammonium formation. Instead, rapid protonation at the metal center to give hydride complexes was observed. Treatment of [Fe(N2)(dmpe)2] with methylating agents such as methyl triflate or methyl tosylate resulted in methylation of the metal center to afford [FeMe(N2)(dmpe)2](+). Treatment of [Fe(N2)(dmpe)2] with trimethylsilyl triflate, however, resulted in reaction at dinitrogen affording NH4(+) on subsequent treatment with acid. The side-on bound hydrazine complex [Fe(N2H4)(dmpe)2](2+) and bis(ammonia) complex [Fe(NH3)2(dmpe)2](2+) were identified by (15)N NMR spectroscopy as other species formed in the reaction mixture.
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Affiliation(s)
- Leslie D Field
- †School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
| | - Nilay Hazari
- ‡Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, United States
| | - Hsiu L Li
- †School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia
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105
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Sun J, Ou C, Wang C, Uchiyama M, Deng L. Silane-Functionalized N-Heterocyclic Carbene–Cobalt Complexes Containing a Five-Coordinate Silicon with a Covalent Co–Si Bond. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00114] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jian Sun
- State
Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic
Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, PR China
| | - Chong Ou
- State
Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic
Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, PR China
| | - Chao Wang
- The
Advanced Elements Chemistry Research Team, Center for Sustainable
Resource Science and the Elements Chemistry, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama-ken 351-0198, Japan
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Masanobu Uchiyama
- The
Advanced Elements Chemistry Research Team, Center for Sustainable
Resource Science and the Elements Chemistry, RIKEN, 2-1 Hirosawa, Wako-shi, Saitama-ken 351-0198, Japan
- Graduate
School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Liang Deng
- State
Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic
Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, PR China
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106
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Gualco P, Mallet-Ladeira S, Kameo H, Nakazawa H, Mercy M, Maron L, Amgoune A, Bourissou D. Coordination of a Triphosphine–Silane to Gold: Formation of a Trigonal Pyramidal Complex Featuring Au+→Si Interaction. Organometallics 2015. [DOI: 10.1021/om501154d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Pauline Gualco
- UPS,
Laboratoire Hétérochimie Fondamentale et Appliqué
(LHFA), Université de Toulouse, and CNRS, LHFA, UMR 5069, 118 Route
de Narbonne, 31062 Toulouse, France
| | - Sonia Mallet-Ladeira
- Institut
de Chimie de Toulouse (FR 2599), Université Paul Sabatier, 118 Route
de Narbonne, 31062 Toulouse Cedex 9, France
| | - Hajime Kameo
- Department
of Chemistry, Graduate School of Science, Osaka Prefecture University, Gakuen-cho 1-1, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Hiroshi Nakazawa
- Department
of Chemistry, Graduate School of Science, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Maxime Mercy
- INSA,
UPS, Laboratoire de Physique et Chimie des Nano-Objets, (LPCNO), Université de Toulouse, and CNRS, LPCNO, UMR 5215, 135 Avenue
de Rangueil, 31077 Toulouse, France
| | - Laurent Maron
- INSA,
UPS, Laboratoire de Physique et Chimie des Nano-Objets, (LPCNO), Université de Toulouse, and CNRS, LPCNO, UMR 5215, 135 Avenue
de Rangueil, 31077 Toulouse, France
| | - Abderrahmane Amgoune
- UPS,
Laboratoire Hétérochimie Fondamentale et Appliqué
(LHFA), Université de Toulouse, and CNRS, LHFA, UMR 5069, 118 Route
de Narbonne, 31062 Toulouse, France
| | - Didier Bourissou
- UPS,
Laboratoire Hétérochimie Fondamentale et Appliqué
(LHFA), Université de Toulouse, and CNRS, LHFA, UMR 5069, 118 Route
de Narbonne, 31062 Toulouse, France
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107
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Kameo H, Kawamoto T, Bourissou D, Sakaki S, Nakazawa H. Evaluation of the σ-Donation from Group 11 Metals (Cu, Ag, Au) to Silane, Germane, and Stannane Based on the Experimental/Theoretical Systematic Approach. Organometallics 2015. [DOI: 10.1021/om501159v] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Hajime Kameo
- Department
of Chemistry, Graduate School of Science, Osaka Prefecture University, Gakuen-cho 1-1, Naka-ku, Sakai, Osaka 599-8531, Japan
| | - Tatsuya Kawamoto
- Department
of Chemistry, Graduate School of Science, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Didier Bourissou
- UPS,
Laboratoire Hétérochimie Fondamentale Appliquée, Université de Toulouse, 118 Route de Narbonne, F-31062 Toulouse, France
- CNRS, LHFA UMR 5069, F-31062 Toulouse, France
| | - Shigeyoshi Sakaki
- Fukui
Institute for Fundamental Chemistry, Kyoto University, Takano-nishihiraki-cho
34-4, Sakyo-ku, Kyoto 606-8103, Japan
| | - Hiroshi Nakazawa
- Department
of Chemistry, Graduate School of Science, Osaka City University, Sugimoto 3-3-138, Sumiyoshi-ku, Osaka 558-8585, Japan
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108
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Siedschlag RB, Bernales V, Vogiatzis KD, Planas N, Clouston LJ, Bill E, Gagliardi L, Lu CC. Catalytic Silylation of Dinitrogen with a Dicobalt Complex. J Am Chem Soc 2015; 137:4638-41. [DOI: 10.1021/jacs.5b01445] [Citation(s) in RCA: 139] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
| | | | | | | | | | - Eckhard Bill
- Max Planck Institut für Chemische Energiekonversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany
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109
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Khoenkhoen N, de Bruin B, Reek JNH, Dzik WI. Reactivity of Dinitrogen Bound to Mid- and Late-Transition-Metal Centers. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201403041] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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110
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Ung G, Peters JC. Low-temperature N2 binding to two-coordinate L2Fe(0) enables reductive trapping of L2FeN2(-) and NH3 generation. Angew Chem Int Ed Engl 2015; 54:532-5. [PMID: 25394570 PMCID: PMC4314396 DOI: 10.1002/anie.201409454] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Indexed: 11/10/2022]
Abstract
The two-coordinate [(CAAC)2Fe] complex [CAAC = cyclic (alkyl)(amino)carbene] binds dinitrogen at low temperature (T<-80 °C). The resulting putative three-coordinate N2 complex, [(CAAC)2Fe(N2)], was trapped by one-electron reduction to its corresponding anion [(CAAC)2FeN2](-) at low temperature. This complex was structurally characterized and features an activated dinitrogen unit which can be silylated at the β-nitrogen atom. The redox-linked complexes [(CAAC)2Fe(I)][BAr(F)4], [(CAAC)2Fe(0)], and [(CAAC)2Fe(-I)N2](-) were all found to be active for the reduction of dinitrogen to ammonia upon treatment with KC8 and HBAr(F)4⋅2 Et2O at -95 °C [up to (3.4±1.0) equivalents of ammonia per Fe center]. The N2 reduction activity is highly temperature dependent, with significant N2 reduction to NH3 only occurring below -78 °C. This reactivity profile tracks with the low temperatures needed for N2 binding and an otherwise unavailable electron-transfer step to generate reactive [(CAAC)2FeN2](-) .
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Affiliation(s)
- Gatël Ung
- Division of Chemistry and Chemical Engineering California Institute of Technology (USA)
| | - Jonas C. Peters
- Division of Chemistry and Chemical Engineering California Institute of Technology (USA)
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111
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Toure M, Chuzel O, Parrain JL. Synthesis and structure of Ag(i), Pd(ii), Rh(i), Ru(ii) and Au(i) NHC-complexes with a pendant Lewis acidic boronic ester moiety. Dalton Trans 2015; 44:7139-43. [DOI: 10.1039/c5dt00814j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Synthesis and characterization of novel NHC-boronic ester ligands and their corresponding TM-complexes.
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Affiliation(s)
- Momar Toure
- Aix-Marseille Université
- Centrale Marseille
- CNRS
- iSm2 UMR 7313
- Marseille
| | - Olivier Chuzel
- Aix-Marseille Université
- Centrale Marseille
- CNRS
- iSm2 UMR 7313
- Marseille
| | - Jean-Luc Parrain
- Aix-Marseille Université
- Centrale Marseille
- CNRS
- iSm2 UMR 7313
- Marseille
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112
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Hu Y, Ribbe MW. Nitrogenase and homologs. J Biol Inorg Chem 2014; 20:435-45. [PMID: 25491285 DOI: 10.1007/s00775-014-1225-3] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 11/24/2014] [Indexed: 11/24/2022]
Abstract
Nitrogenase catalyzes biological nitrogen fixation, a key step in the global nitrogen cycle. Three homologous nitrogenases have been identified to date, along with several structural and/or functional homologs of this enzyme that are involved in nitrogenase assembly, bacteriochlorophyll biosynthesis and methanogenic process, respectively. In this article, we provide an overview of the structures and functions of nitrogenase and its homologs, which highlights the similarity and disparity of this uniquely versatile group of enzymes.
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Affiliation(s)
- Yilin Hu
- Department of Molecular Biology and Biochemistry, 2230 McGaugh Hall, University of California, Irvine, CA, 92697-3900, USA,
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113
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Inagaki F, Matsumoto C, Okada Y, Maruyama N, Mukai C. Air-Stable Cationic Gold(I) Catalyst Featuring a Z-Type Ligand: Promoting Enyne Cyclizations. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408037] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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114
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Inagaki F, Matsumoto C, Okada Y, Maruyama N, Mukai C. Air-stable cationic gold(I) catalyst featuring a Z-type ligand: promoting enyne cyclizations. Angew Chem Int Ed Engl 2014; 54:818-22. [PMID: 25470134 DOI: 10.1002/anie.201408037] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Revised: 10/07/2014] [Indexed: 01/01/2023]
Abstract
An air-stable cationic Au(I) complex featuring a Z-type ligand (boron atom) as a σ-acceptor was developed for elucidating the effect of B on catalytic reactions. An enyne cyclization in the presence of either [Au→B](+) or [Au](+) showed that [Au→B](+) promotes the reactivity, which enabled the effective construction of not only five- and six-membered rings, but also seven-membered rings.
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Affiliation(s)
- Fuyuhiko Inagaki
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University, Kakuma-machi, Kanazawa 920-1192 (Japan).
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115
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Köthe C, Limberg C. Late Metal Scaffolds that Activate Both, Dinitrogen and Reduced Dinitrogen Species NxHy. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201400378] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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116
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Ung G, Peters JC. Low-Temperature N2Binding to Two-Coordinate L2Fe0Enables Reductive Trapping of L2FeN2−and NH3Generation. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201409454] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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117
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Hölscher M, Leitner W. Low Activation Barriers in N2Reduction with H2at Ruthenium Pincer Complexes Induced by Ligand Cooperativity: A Computational Study. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402706] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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118
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Liao Q, Saffon-Merceron N, Mézailles N. Catalytic Dinitrogen Reduction at the Molybdenum Center Promoted by a Bulky Tetradentate Phosphine Ligand. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201408664] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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119
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Liao Q, Saffon-Merceron N, Mézailles N. Catalytic Dinitrogen Reduction at the Molybdenum Center Promoted by a Bulky Tetradentate Phosphine Ligand. Angew Chem Int Ed Engl 2014; 53:14206-10. [DOI: 10.1002/anie.201408664] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2014] [Indexed: 11/07/2022]
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120
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Cowie BE, Emslie DJH. Platinum complexes of a borane-appended analogue of 1,1'-bis(diphenylphosphino)ferrocene: flexible borane coordination modes and in situ vinylborane formation. Chemistry 2014; 20:16899-912. [PMID: 25319095 DOI: 10.1002/chem.201404846] [Citation(s) in RCA: 87] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Indexed: 11/06/2022]
Abstract
A bis(phosphine)borane ambiphilic ligand, [Fe(η(5) -C5 H4 PPh2 )(η(5) -C5 H4 PtBu{C6 H4 (BPh2 )-ortho})] (FcPPB), in which the borane occupies a terminal position, was prepared. Reaction of FcPPB with tris(norbornene)platinum(0) provided [Pt(FcPPB)] (1) in which the arylborane is η(3) BCC-coordinated. Subsequent reaction with CO and CNXyl (Xyl=2,6-dimethylphenyl) afforded [PtL(FcPPB)] {L=CO (2) and CNXyl (3)} featuring η(2) BC- and η(1) B-arylborane coordination modes, respectively. Reaction of 1 or 2 with H2 yielded [PtH(μ-H)(FcPPB)] in which the borane is bound to a hydride ligand on platinum. Addition of PhC2 H to [Pt(FcPPB)] afforded [Pt(C2 Ph)(μ-H)(FcPPB)] (5), which rapidly converted to [Pt(FcPPB')] (6; FcPPB'=[Fe(η(5) -C5 H4 PPh2 )(η(5) -C5 H4 PtBu{C6 H4 (BPh-CPh=CHPh-Z)-ortho}]) in which the newly formed vinylborane is η(3) BCC-coordinated. Unlike arylborane complex 1, vinylborane complex 6 does not react with CO, CNXyl, H2 or HC2 Ph at room temperature.
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Affiliation(s)
- Bradley E Cowie
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St. West, Hamilton, Ontario, L8S 4M1 (Canada)
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121
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Reduction of Metal Coordinated N2to NH3with H2by Heterolytic Hydrogen Cleavage induced by External Lewis Bases - a DFT Study. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201400337] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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122
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Lin HJ, Siretanu D, Dickie DA, Subedi D, Scepaniak JJ, Mitcov D, Clérac R, Smith JM. Steric and Electronic Control of the Spin State in Three-Fold Symmetric, Four-Coordinate Iron(II) Complexes. J Am Chem Soc 2014; 136:13326-32. [DOI: 10.1021/ja506425a] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hsiu-Jung Lin
- Department
of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003, United States
- Department
of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
| | - Diana Siretanu
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France
- Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
| | - Diane A. Dickie
- Department
of Chemistry, The University of New Mexico, Albuquerque, New Mexico 87131, United States
| | - Deepak Subedi
- Department
of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003, United States
| | - Jeremiah J. Scepaniak
- Department
of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003, United States
| | - Dmitri Mitcov
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France
- Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
| | - Rodolphe Clérac
- CNRS, CRPP, UPR 8641, F-33600 Pessac, France
- Univ. Bordeaux, CRPP, UPR 8641, F-33600 Pessac, France
| | - Jeremy M. Smith
- Department
of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003, United States
- Department
of Chemistry, Indiana University, 800 East Kirkwood Avenue, Bloomington, Indiana 47405, United States
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123
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Hoffman BM, Lukoyanov D, Yang ZY, Dean DR, Seefeldt LC. Mechanism of nitrogen fixation by nitrogenase: the next stage. Chem Rev 2014; 114:4041-62. [PMID: 24467365 PMCID: PMC4012840 DOI: 10.1021/cr400641x] [Citation(s) in RCA: 979] [Impact Index Per Article: 97.9] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Brian M Hoffman
- Department of Chemistry and Biochemistry, Utah State University , 0300 Old Main Hill, Logan, Utah 84322, United States
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124
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Creutz SE, Peters JC. Catalytic reduction of N2 to NH3 by an Fe-N2 complex featuring a C-atom anchor. J Am Chem Soc 2014; 136:1105-15. [PMID: 24350667 PMCID: PMC3933546 DOI: 10.1021/ja4114962] [Citation(s) in RCA: 257] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
While recent spectroscopic studies have established the presence of an interstitial carbon atom at the center of the iron-molybdenum cofactor (FeMoco) of MoFe-nitrogenase, its role is unknown. We have pursued Fe-N2 model chemistry to explore a hypothesis whereby this C-atom (previously denoted as a light X-atom) may provide a flexible trans interaction with an Fe center to expose an Fe-N2 binding site. In this context, we now report on Fe complexes of a new tris(phosphino)alkyl (CP(iPr)3) ligand featuring an axial carbon donor. It is established that the iron center in this scaffold binds dinitrogen trans to the C(alkyl)-atom anchor in three distinct and structurally characterized oxidation states. Fe-C(alkyl) lengthening is observed upon reduction, reflective of significant ionic character in the Fe-C(alkyl) interaction. The anionic (CP(iPr)3)FeN2(-) species can be functionalized by a silyl electrophile to generate (CP(iPr)3)Fe-N2SiR3. (CP(iPr)3)FeN2(-) also functions as a modest catalyst for the reduction of N2 to NH3 when supplied with electrons and protons at -78 °C under 1 atm N2 (4.6 equiv NH3/Fe).
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Affiliation(s)
- Sidney E. Creutz
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Jonas C. Peters
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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125
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Chiang KP, Bellows SM, Brennessel WW, Holland PL. Multimetallic Cooperativity in Activation of Dinitrogen at Iron-Potassium Sites. Chem Sci 2014; 5. [PMID: 24379972 DOI: 10.1039/c3sc52487f] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
The reaction of soluble iron-oxygen-potassium assemblies with N2 gives insight into the mechanisms of multimetallic N2 coordination. We report a series of very electron-rich three-coordinate, β-diketiminate-supported iron(I) phenoxide complexes, which are metastable but have been characterized under Ar by both crystallography and solution methods. Both monomeric and dimeric Fe-OPh-K compounds have been characterized, and their iron environments are very similar in the solid and solution states. In the dimer, potassium ions hold together the phenoxide oxygens and aryl rings of the two halves, to give a flexible diiron core. The reactions of the monomeric and dimeric iron(I) compounds with N2 are surprisingly different: the mononuclear iron(I) complexes give no reaction with N2, but the dimeric Fe2K2 complex reacts rapidly to give a diiron-N2 product. Computational studies show that the key to the rapid N2 reaction of the dimer is the preorganization of the two iron atoms. Thus, cooperation between Fe (which weakens the N-N bond) and K (which orients the Fe atoms) can be used to create a low-energy pathway for N2 reactions.
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Affiliation(s)
- Karen P Chiang
- Department of Chemistry, University of Rochester, Rochester, New York 14627, USA
| | - Sarina M Bellows
- Department of Chemistry, University of Rochester, Rochester, New York 14627, USA
| | - William W Brennessel
- Department of Chemistry, University of Rochester, Rochester, New York 14627, USA
| | - Patrick L Holland
- Department of Chemistry, University of Rochester, Rochester, New York 14627, USA
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126
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Ribbe MW, Hu Y, Hodgson KO, Hedman B. Biosynthesis of nitrogenase metalloclusters. Chem Rev 2013; 114:4063-80. [PMID: 24328215 DOI: 10.1021/cr400463x] [Citation(s) in RCA: 100] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Markus W Ribbe
- Department of Molecular Biology and Biochemistry, University of California , Irvine, California 92697-3900, United States
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127
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Catalytic conversion of nitrogen to ammonia by an iron model complex. Nature 2013; 501:84-7. [PMID: 24005414 PMCID: PMC3882122 DOI: 10.1038/nature12435] [Citation(s) in RCA: 656] [Impact Index Per Article: 59.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2013] [Accepted: 07/04/2013] [Indexed: 11/08/2022]
Abstract
The reduction of nitrogen (N2) to ammonia (NH3) is a requisite transformation for life. Although it is widely appreciated that the iron-rich cofactors of nitrogenase enzymes facilitate this transformation, how they do so remains poorly understood. A central element of debate has been the exact site or sites of N2 coordination and reduction. In synthetic inorganic chemistry, an early emphasis was placed on molybdenum because it was thought to be an essential element of nitrogenases and because it had been established that well-defined molybdenum model complexes could mediate the stoichiometric conversion of N2 to NH3 (ref. 9). This chemical transformation can be performed in a catalytic fashion by two well-defined molecular systems that feature molybdenum centres. However, it is now thought that iron is the only transition metal essential to all nitrogenases, and recent biochemical and spectroscopic data have implicated iron instead of molybdenum as the site of N2 binding in the FeMo-cofactor. Here we describe a tris(phosphine)borane-supported iron complex that catalyses the reduction of N2 to NH3 under mild conditions, and in which more than 40 per cent of the proton and reducing equivalents are delivered to N2. Our results indicate that a single iron site may be capable of stabilizing the various NxHy intermediates generated during catalytic NH3 formation. Geometric tunability at iron imparted by a flexible iron-boron interaction in our model system seems to be important for efficient catalysis. We propose that the interstitial carbon atom recently assigned in the nitrogenase cofactor may have a similar role, perhaps by enabling a single iron site to mediate the enzymatic catalysis through a flexible iron-carbon interaction.
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128
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129
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Broda H, Tuczek F. Catalytic Ammonia Synthesis in Homogeneous Solution-Biomimetic at Last? Angew Chem Int Ed Engl 2013; 53:632-4. [DOI: 10.1002/anie.201308780] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Indexed: 11/09/2022]
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130
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Fe-N2/CO complexes that model a possible role for the interstitial C atom of FeMo-cofactor (FeMoco). Proc Natl Acad Sci U S A 2013; 110:15898-903. [PMID: 24043796 DOI: 10.1073/pnas.1310153110] [Citation(s) in RCA: 105] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We report here a series of four- and five-coordinate Fe model complexes that feature an axial tri(silyl)methyl ligand positioned trans to a substrate-binding site. This arrangement is used to crudely model a single-belt Fe site of the FeMo-cofactor that might bind N2 at a position trans to the interstitial C atom. Reduction of a trigonal pyramidal Fe(I) complex leads to uptake of N2 and subsequent functionalization furnishes an open-shell Fe-diazenido complex. A related series of five-coordinate Fe-CO complexes stable across three redox states is also described. Spectroscopic, crystallographic, and Density Functional Theory (DFT) studies of these complexes suggest that a decrease in the covalency of the Fe-C(alkyl) interaction occurs upon reduction and substrate binding. This leads to unusually long Fe-C(alkyl) bond distances that reflect an ionic Fe-C bond. The data presented are contextualized in support of a hypothesis wherein modulation of a belt Fe-C interaction in the FeMo-cofactor facilitates substrate binding and reduction.
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131
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132
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Gogoi U, Guha AK, Phukan AK. Tracing the route to ammonia: a theoretical study on the possible pathways for dinitrogen reduction with tripodal iron complexes. Chemistry 2013; 19:11077-89. [PMID: 23821310 DOI: 10.1002/chem.201300991] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 05/14/2013] [Indexed: 11/08/2022]
Abstract
The chemistry of nitrogen fixation has been the subject of considerable research with a view to gaining a proper understanding of the mechanistic details. In this article, density functional calculations are performed on all the mechanistic possibilities for dinitrogen reduction mediated by the tripodal iron complexes [(SiP(Me)3)Fe(I)] ([Fe(Si)]) and [(BP(Me)3)Fe(0)] ([Fe(B)]). Dinitrogen addition to the neutral bare complex is found to be thermodynamically more favorable than that to the anionic one. Both symmetric and asymmetric pathways, along with the possible intermediates and transition states, are considered in this study. For both systems, the symmetric path is found to be more likely, although the prospect of the asymmetric path cannot be ignored. Moreover, interconversions between these two pathways are found to be less likely. This study corroborates most experimental observations and provides theoretical insight into the possible existence of some hitherto unknown intermediates such as multiple-bonded Fe-N species in a trigonal bipyramidal geometry. Furthermore, in agreement with experimental observations, this study also highlights the possibility of hydrogen and hydrazine evolution during the complete reduction of dinitrogen.
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Affiliation(s)
- Ujjal Gogoi
- Department of Chemical Sciences, Tezpur University, Napaam-784028, Assam, India
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133
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Dugan TR, Macleod KC, Brennessel WW, Holland PL. Cobalt-Magnesium and Iron-Magnesium Complexes with Weakened Dinitrogen Bridges. Eur J Inorg Chem 2013; 2013. [PMID: 24367236 DOI: 10.1002/ejic.201300187] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The cooperative binding of N2 by late transition metals and main-group metals is a promising strategy for N-N bond weakening and activation. We report the use of activated Rieke magnesium for reduction of iron and cobalt complexes supported by bulky β-diketiminate ligands. Binding of N2 is accompanied by assembly of a linear M-NN-Mg-NN-M (M = Co, Fe) core with N-N bonds that are weakened, as judged by infrared spectroscopy. Both the cobalt and iron complexes require THF solvent, because of Mg-THF binding. The cobalt complex can be isolated as a pure solid, but the iron complex is stable only in solution. These results demonstrate the correlation between the binding mode and N-N weakening in heterobimetallic N2 complexes.
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Affiliation(s)
- Thomas R Dugan
- Department of Chemistry, University of Rochester, Rochester, NY 14618, , Homepage: http://chem.rochester.edu/~plhgrp/
| | - K Cory Macleod
- Department of Chemistry, University of Rochester, Rochester, NY 14618, , Homepage: http://chem.rochester.edu/~plhgrp/
| | - William W Brennessel
- Department of Chemistry, University of Rochester, Rochester, NY 14618, , Homepage: http://chem.rochester.edu/~plhgrp/
| | - Patrick L Holland
- Department of Chemistry, University of Rochester, Rochester, NY 14618, , Homepage: http://chem.rochester.edu/~plhgrp/
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134
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Gloaguen Y, Jongens LM, Reek JNH, Lutz M, de Bruin B, van der Vlugt JI. Reductive Elimination at an Ortho-Metalated Iridium(III) Hydride Bearing a Tripodal Tetraphosphorus Ligand. Organometallics 2013. [DOI: 10.1021/om400451y] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Yann Gloaguen
- Homogeneous & Supramolecular Catalysis, van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Lianne M. Jongens
- Homogeneous & Supramolecular Catalysis, van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Joost N. H. Reek
- Homogeneous & Supramolecular Catalysis, van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Martin Lutz
- Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research, Faculty of Science, Utrecht University, The Netherlands
| | - Bas de Bruin
- Homogeneous & Supramolecular Catalysis, van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Jarl Ivar van der Vlugt
- Homogeneous & Supramolecular Catalysis, van ’t Hoff Institute for Molecular Sciences, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
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135
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Rudd PA, Planas N, Bill E, Gagliardi L, Lu CC. Dinitrogen Activation at Iron and Cobalt Metallalumatranes. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300272] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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136
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Kameo H, Nakazawa H. Recent Developments in the Coordination Chemistry of Multidentate Ligands Featuring a Boron Moiety. Chem Asian J 2013; 8:1720-34. [DOI: 10.1002/asia.201300184] [Citation(s) in RCA: 121] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2013] [Revised: 03/19/2013] [Indexed: 11/08/2022]
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137
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Boone MP, Stephan DW. A Ru−η6-Arene Complex as a C-Based Lewis Acid in the Activation of Hydrogen and Hydrogenation Catalysis. J Am Chem Soc 2013; 135:8508-11. [DOI: 10.1021/ja403912n] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael P. Boone
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada
M5S 3H6
| | - Douglas W. Stephan
- Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada
M5S 3H6
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138
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Recent developments in the homogeneous reduction of dinitrogen by molybdenum and iron. Nat Chem 2013; 5:559-65. [PMID: 23787744 DOI: 10.1038/nchem.1620] [Citation(s) in RCA: 277] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2012] [Accepted: 03/01/2013] [Indexed: 11/08/2022]
Abstract
The reduction of gaseous nitrogen is a challenge for industrial, biological and synthetic chemists. Major goals include understanding the formation of ammonia for agriculture, and forming N-C and N-Si bonds for the synthesis of fine chemicals. The iron-molybdenum active site of the enzyme nitrogenase has inspired chemists to explore iron and molybdenum complexes in transformations related to N2 reduction. This area of research has gained significant momentum, and the past two years have witnessed a number of significant advances in synthetic Fe-N2 and Mo-N2 chemistry. Furthermore, the identities of all atoms in the iron-molybdenum cofactor of nitrogenase have finally been elucidated, and the discovery of a carbide has generated new questions and targets for coordination chemists. This Perspective summarizes the recent work on iron and molydenum complexes, and highlights the opportunities for continued research.
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139
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Fong H, Moret ME, Lee Y, Peters JC. Heterolytic H 2 Cleavage and Catalytic Hydrogenation by an Iron Metallaboratrane. Organometallics 2013; 32:3053-3062. [PMID: 24000270 PMCID: PMC3757927 DOI: 10.1021/om400281v] [Citation(s) in RCA: 172] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reversible, heterolytic addition of H2 across an iron-boron bond in a ferraboratrane with formal hydride transfer to the boron gives iron-borohydrido-hydride complexes. These compounds catalyze the hydrogenation of alkenes and alkynes to the respective alkanes. Notably, the boron is capable of acting as a shuttle for hydride transfer to substrates. The results are interesting in the context of heterolytic substrate addition across metal-boron bonds in metallaboratranes and related systems, as well as metal-ligand bifunctional catalysis.
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Affiliation(s)
- Henry Fong
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
| | | | | | - Jonas C. Peters
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125, USA
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140
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Tsoureas N, Hamilton A, Haddow MF, Harvey JN, Orpen AG, Owen GR. Insight into the Hydrogen Migration Processes Involved in the Formation of Metal–Borane Complexes: Importance of the Third Arm of the Scorpionate Ligand. Organometallics 2013. [DOI: 10.1021/om4002389] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Nikolaos Tsoureas
- The School of Chemistry, University of Bristol, Cantock’s
Close, Bristol, U.K. BS8 1TS
| | - Alex Hamilton
- The School of Chemistry, University of Bristol, Cantock’s
Close, Bristol, U.K. BS8 1TS
| | - Mairi F. Haddow
- The School of Chemistry, University of Bristol, Cantock’s
Close, Bristol, U.K. BS8 1TS
| | - Jeremy N. Harvey
- The School of Chemistry, University of Bristol, Cantock’s
Close, Bristol, U.K. BS8 1TS
| | - A. Guy Orpen
- The School of Chemistry, University of Bristol, Cantock’s
Close, Bristol, U.K. BS8 1TS
| | - Gareth R. Owen
- The School of Chemistry, University of Bristol, Cantock’s
Close, Bristol, U.K. BS8 1TS
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141
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Umehara K, Kuwata S, Ikariya T. N–N Bond Cleavage of Hydrazines with a Multiproton-Responsive Pincer-Type Iron Complex. J Am Chem Soc 2013; 135:6754-7. [DOI: 10.1021/ja3122944] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kazuki Umehara
- Department
of Applied Chemistry, Graduate School of
Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Shigeki Kuwata
- Department
of Applied Chemistry, Graduate School of
Science and Engineering, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Takao Ikariya
- 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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142
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Wiig JA, Lee CC, Hu Y, Ribbe MW. Tracing the interstitial carbide of the nitrogenase cofactor during substrate turnover. J Am Chem Soc 2013; 135:4982-3. [PMID: 23514429 DOI: 10.1021/ja401698d] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The fate of the interstitial atom of the nitrogenase cofactor during substrate turnover has remained a topic of interest since the discovery of this atom more than a decade ago. In this study, we labeled the interstitial carbide atom with (14)C and (13)C isotopes and traced the fate of the isotope under turnover conditions. Our results show that the interstitial carbide cannot be exchanged upon turnover, nor can it be used as a substrate and incorporated into the products. These observations point to a role of the interstitial carbide in stabilizing the cofactor structure, although a function of this atom in indirectly modulating the reactivity of the cofactor or directly interacting with the substrate cannot be excluded.
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Affiliation(s)
- Jared A Wiig
- Department of Molecular Biology and Biochemistry, University of California, Irvine , California 92697-3900, United States
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143
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Suess DLM, Peters JC. H-H and Si-H bond addition to Fe≡NNR2 intermediates derived from N2. J Am Chem Soc 2013; 135:4938-41. [PMID: 23472709 DOI: 10.1021/ja400836u] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis and characterization of Fe-diphosphineborane complexes are described in the context of N2 functionalization chemistry. Iron aminoimides can be generated at room temperature under 1 atm N2 and are shown to react with E-H bonds from PhSiH3 and H2. The resulting products derive from delivery of the E fragment to Nα and the H atom to B. The flexibility and lability of the Fe-BPh interactions in these complexes engender this reactivity.
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Affiliation(s)
- Daniel L M Suess
- Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
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144
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Bass HM, Cramer SA, McCullough AS, Bernstein KJ, Murdock CR, Jenkins DM. Employing Dianionic Macrocyclic Tetracarbenes To Synthesize Neutral Divalent Metal Complexes. Organometallics 2013. [DOI: 10.1021/om400043z] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Heather M. Bass
- Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600, United
States
| | - S. Alan Cramer
- Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600, United
States
| | - Alexander S. McCullough
- Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600, United
States
| | - Karl J. Bernstein
- Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600, United
States
| | - Christopher R. Murdock
- Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600, United
States
| | - David M. Jenkins
- Department of Chemistry, The University of Tennessee, Knoxville, Tennessee 37996-1600, United
States
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145
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Affiliation(s)
- Marc-Etienne Moret
- Division
of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California
91125, United States
| | - Limei Zhang
- Division
of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California
91125, United States
| | - Jonas C. Peters
- Division
of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California
91125, United States
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146
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Bartholomew ER, Volpe EC, Wolczanski PT, Lobkovsky EB, Cundari TR. Selective Extraction of N2 from Air by Diarylimine Iron Complexes. J Am Chem Soc 2013; 135:3511-27. [DOI: 10.1021/ja311021u] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Erika R. Bartholomew
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Emily C. Volpe
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Peter T. Wolczanski
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Emil B. Lobkovsky
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Thomas R. Cundari
- Department of Chemistry, Center for Advanced Scientific
Computing and Modeling (CASCaM), University of North Texas, Box 305070, Denton, Texas 76203-5070, United
States
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147
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Kameo H, Nakazawa H. Synthesis of a Rhodium Complex Featuring the Rh–H–B Linkage via a Hydride Migration from Rhodium to Borane: Study on the Electronic Deviation Induced by the Presence of the Boron Moiety. Organometallics 2012. [DOI: 10.1021/om300762u] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hajime Kameo
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Hiroshi Nakazawa
- Department of Chemistry, Graduate School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
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148
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Saouma CT, Lu CC, Peters JC. Mononuclear five- and six-coordinate iron hydrazido and hydrazine species. Inorg Chem 2012; 51:10043-54. [PMID: 22950847 DOI: 10.1021/ic301704f] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
This article describes the synthesis and characterization of several low-spin iron(II) complexes that coordinate hydrazine (N(2)H(4)), hydrazido (N(2)H(3)(-)), and ammonia. The sterically encumbered tris(di-meta-terphenylphosphino)borate ligand, [PhBP(mter)(3)](-), is introduced to provide access to species that cannot be stabilized with the [PhBP(Ph)(3)](-) ligand ([PhBP(R)(3)](-) = PhB(CH(2)PR(2))(3)(-)). Treatment of [PhBP(mter)(3)]FeMe with hydrazine generates the unusual 5-coordinate hydrazido complex [PhBP(mter)(3)]Fe(η(2)-N(2)H(3)) (1), in which the hydrazido serves as an L(2)X-type ligand. Upon coordination of an L-type ligand, the hydrazido shifts to an LX-type ligand, generating [PhBP(mter)(3)]Fe(L)(η(2)-N(2)H(3)) (L = N(2)H(4) (2) or NH(3) (3)). In contrast, treatment of [PhBP(Ph)(3)]FeMe with hydrazine forms the adduct [PhBP(Ph)(3)]Fe(Me)(η(2)-N(2)H(4)) (5). Complex 5 is thermally unstable to methane loss, generating intermediate [PhBP(Ph)(3)]Fe(η(2)-N(2)H(3)), which undergoes bimolecular coupling to produce {[PhBP(Ph)(3)]Fe}(2)(μ-η(1):η(1)-N(2)H(4))(μ-η(2):η(2)-N(2)H(2)). The oxidation of these and related hydrazine and hydrazido species is also presented. For example, oxidation of 1 or 5 with Pb(OAc)(4) results in disproportionation of the N(2)H(x) ligand (x = 3, 4), and formation of [PhBP(R)(3)]Fe(NH(3))(OAc) (R = Ph (9) and mter (11)).
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Affiliation(s)
- Caroline T Saouma
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, USA
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149
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Rozenel SS, Arnold J. Bimetallic Ruthenium PNP Pincer Complex As a Platform to Model Proposed Intermediates in Dinitrogen Reduction to Ammonia. Inorg Chem 2012; 51:9730-9. [DOI: 10.1021/ic3010322] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Sergio S. Rozenel
- Department of Chemistry, University of California, Berkeley, California 94720,
United States
| | - John Arnold
- Department of Chemistry, University of California, Berkeley, California 94720,
United States
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150
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Kameo H, Hashimoto Y, Nakazawa H. Synthesis of Iridaboratranes Bearing Phosphine-Tethered Borane: Reversible CO/PR3 (R = Me, OMe, OEt) Substitution Reactions Induced by a σ-Electron-Acceptor Borane Ligand. Organometallics 2012. [DOI: 10.1021/om300216g] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hajime Kameo
- Department of Chemistry, Graduate
School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Yasuhiro Hashimoto
- Department of Chemistry, Graduate
School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
| | - Hiroshi Nakazawa
- Department of Chemistry, Graduate
School of Science, Osaka City University, 3-3-138 Sugimoto, Sumiyoshi-ku, Osaka 558-8585, Japan
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