1
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Bruch QJ, Malakar S, Goldman AS, Miller AJM. Mechanisms of Electrochemical N 2 Splitting by a Molybdenum Pincer Complex. Inorg Chem 2022; 61:2307-2318. [PMID: 35043634 DOI: 10.1021/acs.inorgchem.1c03698] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Molybdenum complexes supported by tridentate pincer ligands are exceptional catalysts for dinitrogen fixation using chemical reductants, but little is known about their prospects for electrochemical reduction of dinitrogen. The viability of electrochemical N2 binding and splitting by a molybdenum(III) pincer complex, (pyPNP)MoBr3 (pyPNP = 2,6-bis(tBu2PCH2)-C5H3N)), is established in this work, providing a foundation for a detailed mechanistic study of electrode-driven formation of the nitride complex (pyPNP)Mo(N)Br. Electrochemical kinetic analysis, optical and vibrational spectroelectrochemical monitoring, and computational studies point to two concurrent reaction pathways: In the reaction-diffusion layer near the electrode surface, the molybdenum(III) precursor is reduced by 2e- and generates a bimetallic molybdenum(I) Mo2(μ-N2) species capable of N-N bond scission; and in the bulk solution away from the electrode surface, over-reduced molybdenum(0) species undergo chemical redox reactions via comproportionation to generate the same bimetallic molybdenum(I) species capable of N2 cleavage. The comproportionation reactions reveal the surprising intermediacy of dimolybdenum(0) complex trans,trans-[(pyPNP)Mo(N2)2](μ-N2) in N2 splitting pathways. The same "over-reduced" molybdenum(0) species was also found to cleave N2 upon addition of lutidinium, an acid frequently used in catalytic reduction of dinitrogen.
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Affiliation(s)
- Quinton J Bruch
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - Santanu Malakar
- 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
| | - Alexander J M Miller
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
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2
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Tanabe Y, Nishibayashi Y. Comprehensive insights into synthetic nitrogen fixation assisted by molecular catalysts under ambient or mild conditions. Chem Soc Rev 2021; 50:5201-5242. [PMID: 33651046 DOI: 10.1039/d0cs01341b] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
N2 is fixed as NH3 industrially by the Haber-Bosch process under harsh conditions, whereas biological nitrogen fixation is achieved under ambient conditions, which has prompted development of alternative methods to fix N2 catalyzed by transition metal molecular complexes. Since the early 21st century, catalytic conversion of N2 into NH3 under ambient conditions has been achieved by using molecular catalysts, and now H2O has been utilized as a proton source with turnover frequencies reaching the values found for biological nitrogen fixation. In this review, recent advances in the development of molecular catalysts for synthetic N2 fixation under ambient or mild conditions are summarized, and potential directions for future research are also discussed.
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Affiliation(s)
- Yoshiaki Tanabe
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
| | - Yoshiaki Nishibayashi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan.
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3
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Abstract
Activation of dinitrogen plays an important role in daily anthropogenic life, and the processes by which this fixation occurs have been a longstanding and significant research focus within the community. One of the major fields of dinitrogen activation research is the use of multimetallic compounds to reduce and/or activate N2 into a more useful nitrogen-atom source, such as ammonia. Here we report a comprehensive review of multimetallic-dinitrogen complexes and their utility toward N2 activation, beginning with the d-block metals from Group 4 to Group 11, then extending to Group 13 (which is exclusively populated by B complexes), and finally the rare-earth and actinide species. The review considers all polynuclear metal aggregates containing two or more metal centers in which dinitrogen is coordinated or activated (i.e., partial or complete cleavage of the N2 triple bond in the observed product). Our survey includes complexes in which mononuclear N2 complexes are used as building blocks to generate homo- or heteromultimetallic dinitrogen species, which allow one to evaluate the potential of heterometallic species for dinitrogen activation. We highlight some of the common trends throughout the periodic table, such as the differences between coordination modes as it relates to N2 activation and potential functionalization and the effect of polarizing the bridging N2 ligand by employing different metal ions of differing Lewis acidities. By providing this comprehensive treatment of polynuclear metal dinitrogen species, this Review aims to outline the past and provide potential future directions for continued research in this area.
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Affiliation(s)
- Devender Singh
- Center for Catalysis, and Florida Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611-7200, USA
| | - William R. Buratto
- Center for Catalysis, and Florida Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611-7200, USA
| | - Juan F. Torres
- Center for Catalysis, and Florida Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611-7200, USA
| | - Leslie J. Murray
- Center for Catalysis, and Florida Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, FL 32611-7200, USA
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4
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Chalkley MJ, Drover MW, Peters JC. Catalytic N 2-to-NH 3 (or -N 2H 4) Conversion by Well-Defined Molecular Coordination Complexes. Chem Rev 2020; 120:5582-5636. [PMID: 32352271 DOI: 10.1021/acs.chemrev.9b00638] [Citation(s) in RCA: 187] [Impact Index Per Article: 46.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Nitrogen fixation, the six-electron/six-proton reduction of N2, to give NH3, is one of the most challenging and important chemical transformations. Notwithstanding the barriers associated with this reaction, significant progress has been made in developing molecular complexes that reduce N2 into its bioavailable form, NH3. This progress is driven by the dual aims of better understanding biological nitrogenases and improving upon industrial nitrogen fixation. In this review, we highlight both mechanistic understanding of nitrogen fixation that has been developed, as well as advances in yields, efficiencies, and rates that make molecular alternatives to nitrogen fixation increasingly appealing. We begin with a historical discussion of N2 functionalization chemistry that traverses a timeline of events leading up to the discovery of the first bona fide molecular catalyst system and follow with a comprehensive overview of d-block compounds that have been targeted as catalysts up to and including 2019. We end with a summary of lessons learned from this significant research effort and last offer a discussion of key remaining challenges in the field.
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Affiliation(s)
- Matthew J Chalkley
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Marcus W Drover
- 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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5
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Affiliation(s)
- Ionel Haiduc
- Facultatea de Chimie, Universitatea Babeş-Bolyai, Cluj-Napoca, Romania
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6
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de Aguiar SRMM, Schröder-Holzhacker C, Pecak J, Stöger B, Kirchner K. Synthesis and characterization of TADDOL-based chiral group six PNP pincer tricarbonyl complexes. MONATSHEFTE FUR CHEMIE 2018; 150:103-109. [PMID: 30662092 PMCID: PMC6320742 DOI: 10.1007/s00706-018-2281-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2018] [Accepted: 08/14/2018] [Indexed: 11/27/2022]
Abstract
ABSTRACT The new chiral PNP pincer ligand N 2,N 6-bis((3aR, 8aR)-2,2-dimethyl-4,4,8,8-tetraphenyltetrahydro[1,3]dioxolo[4,5-e][1,3,2]dioxaphosphepin-6-yl)pyridine-2,6-diamine (PNP-TADDOL) was synthesized in 80% isolated yield. Complexes of the type [M(PNP-TADDOL)(CO)3] (M = Cr, Mo, and W) were prepared via a solvothermal approach. This methodology constitutes a fast, simple, and practical synthetic method to obtain complexes of that type in high isolated yields. The X-ray structure of the molybdenum complex is presented. GRAPHICAL ABSTRACT
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Affiliation(s)
- Sara R. M. M. de Aguiar
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria
| | | | - Jan Pecak
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria
| | - Berthold Stöger
- X-ray Center, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria
| | - Karl Kirchner
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, 1060 Vienna, Austria
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7
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Arashiba K, Eizawa A, Tanaka H, Nakajima K, Yoshizawa K, Nishibayashi Y. Catalytic Nitrogen Fixation via Direct Cleavage of Nitrogen–Nitrogen Triple Bond of Molecular Dinitrogen under Ambient Reaction Conditions. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2017. [DOI: 10.1246/bcsj.20170197] [Citation(s) in RCA: 127] [Impact Index Per Article: 18.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kazuya Arashiba
- Department of Systems Innovation, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656
| | - Aya Eizawa
- Department of Systems Innovation, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656
| | - Hiromasa Tanaka
- Institute for Materials Chemistry and Engineering, Kyushu University, Nishi-ku, Fukuoka 819-0395
| | - Kazunari Nakajima
- Department of Systems Innovation, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering, Kyushu University, Nishi-ku, Fukuoka 819-0395
| | - Yoshiaki Nishibayashi
- Department of Systems Innovation, School of Engineering, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656
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8
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Tanabe Y, Nishibayashi Y. Catalytic Dinitrogen Fixation to Form Ammonia at Ambient Reaction Conditions Using Transition Metal-Dinitrogen Complexes. CHEM REC 2016; 16:1549-77. [DOI: 10.1002/tcr.201600025] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Indexed: 01/23/2023]
Affiliation(s)
- Yoshiaki Tanabe
- Department of Systems Innovation, School of Engineering; The University of Tokyo; Hongo, Bunkyo-ku Tokyo 113-8656 Japan
| | - Yoshiaki Nishibayashi
- Department of Systems Innovation, School of Engineering; The University of Tokyo; Hongo, Bunkyo-ku Tokyo 113-8656 Japan
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9
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Mastalir M, de Aguiar SRMM, Glatz M, Stöger B, Kirchner K. A Convenient Solvothermal Synthesis of Group 6 PNP Pincer Tricarbonyl Complexes. Organometallics 2016. [DOI: 10.1021/acs.organomet.5b00940] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Matthias Mastalir
- Institute of Applied
Synthetic Chemistry and ‡Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
| | - Sara R. M. M. de Aguiar
- Institute of Applied
Synthetic Chemistry and ‡Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
| | - Mathias Glatz
- Institute of Applied
Synthetic Chemistry and ‡Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
| | - Berthold Stöger
- Institute of Applied
Synthetic Chemistry and ‡Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
| | - Karl Kirchner
- Institute of Applied
Synthetic Chemistry and ‡Institute of Chemical Technologies and Analytics, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria
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10
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Egbert JD, O'Hagan M, Wiedner ES, Bullock RM, Piro NA, Kassel WS, Mock MT. Putting chromium on the map for N2 reduction: production of hydrazine and ammonia. A study of cis-M(N2)2 (M = Cr, Mo, W) bis(diphosphine) complexes. Chem Commun (Camb) 2016; 52:9343-6. [DOI: 10.1039/c6cc03449g] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Protonolysis experiments show of the Group 6 N2 complexes, only Cr affords N2H5+ and NH4+ from reduction of the N2 ligands.
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Affiliation(s)
- Jonathan D. Egbert
- Center for Molecular Electrocatalysis
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Molly O'Hagan
- Center for Molecular Electrocatalysis
- Pacific Northwest National Laboratory
- Richland
- USA
| | - Eric S. Wiedner
- Center for Molecular Electrocatalysis
- Pacific Northwest National Laboratory
- Richland
- USA
| | - R. Morris Bullock
- Center for Molecular Electrocatalysis
- Pacific Northwest National Laboratory
- Richland
- USA
| | | | | | - Michael T. Mock
- Center for Molecular Electrocatalysis
- Pacific Northwest National Laboratory
- Richland
- USA
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11
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Nishibayashi Y. Molybdenum-catalyzed reduction of molecular dinitrogen into ammonia under ambient reaction conditions. CR CHIM 2015. [DOI: 10.1016/j.crci.2015.01.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Nishibayashi Y. Recent progress in transition-metal-catalyzed reduction of molecular dinitrogen under ambient reaction conditions. Inorg Chem 2015; 54:9234-47. [PMID: 26131967 DOI: 10.1021/acs.inorgchem.5b00881] [Citation(s) in RCA: 154] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
This paper describes our recent progress in catalytic nitrogen fixation by using transition-metal-dinitrogen complexes as catalysts. Two reaction systems for the catalytic transformation of molecular dinitrogen into ammonia and its equivalent such as silylamine under ambient reaction conditions have been achieved by the molybdenum-, iron-, and cobalt-dinitrogen complexes as catalysts. Many new findings presented here may provide new access to the development of economical nitrogen fixation in place of the Haber-Bosch process.
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Affiliation(s)
- Yoshiaki Nishibayashi
- Institute of Engineering Innovation, School of Engineering, The University of Tokyo , Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
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13
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de Aguiar SRMM, Öztopcu Ö, Stöger B, Mereiter K, Veiros LF, Pittenauer E, Allmaier G, Kirchner K. Synthesis and reactivity of coordinatively unsaturated halocarbonyl molybdenum PNP pincer complexes. Dalton Trans 2015; 43:14669-79. [PMID: 25142749 DOI: 10.1039/c4dt01932f] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the present study a series of six-coordinate neutral 16e halocarbonyl Mo(ii) complexes of the type [Mo(PNP(Me)-iPr)(CO)X2] (X = I, Br, Cl), featuring the PNP pincer ligand N,N'-bis(diisopropylphosphino)-N,N'-dimethyl-2,6-diaminopyridine (PNP(Me)-iPr), were prepared and fully characterized. The synthesis of these complexes was accomplished by different methodologies depending on the halide ligands. For X = I and Br, [Mo(PNP(Me)-iPr)(CO)I2] and [Mo(PNP(Me)-iPr)(CO)Br2] were obtained by reacting [Mo(PNP(Me)-iPr)(CO)3] with stoichiometric amounts of I2 and Br2, respectively. In the case of X = Cl, [Mo(PNP(Me)-iPr)(CO)Cl2] was afforded by the reaction of [Mo(CO)4(μ-Cl)Cl]2 with 1 equiv. of PNP(Me)-iPr. The equivalent procedure also worked for X = Br. The modification of the 2,6-diaminopyridine scaffold by introducing NMe instead of NH spacers between the aromatic pyridine ring and the phosphine moieties changed the steric properties of the PNP-iPr ligand significantly. While in the present case exclusively neutral six-coordinate complexes of the type [Mo(PNP(Me)-iPr)(CO)X2] were obtained, with the parent PNP-iPr ligand, i.e. featuring NH spacers, cationic seven-coordinate complexes of the type [Mo(PNP-iPr)(CO)3X]X were afforded. Upon treatment of [Mo(PNP(Me)-iPr)(CO)X2] (X = Br, Cl) with Ag(+) in CH3CN, the cationic complexes [Mo(PNP(Me)-iPr)(CO)(CH3CN)X](+) were formed. Halide abstraction from [Mo(PNP(Me)-iPr)(CO)Cl2] in THF-CH2Cl2 afforded [Mo(PNP(Me)-iPr)(CO)(THF)Cl](+). In keeping with the facile synthesis of monocationic complexes preliminary ESI-MS and DFT/B3LYP studies revealed that one halide ligand in complexes [Mo(PNP(Me)-iPr)(CO)X2] is labile forming cationic fragments [Mo(PNP(Me)-iPr)(CO)X](+) which react with molecular oxygen in parallel pathways to yield mono and dioxo Mo(iv) and Mo(vi) species. Structures of representative complexes were determined by X-ray single crystal analyses.
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Affiliation(s)
- Sara R M M de Aguiar
- Institute of Applied Synthetic Chemistry, Vienna University of Technology, Getreidemarkt 9, A-1060 Vienna, Austria.
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14
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Laxson W, Özkar S, Folkman S, Finke R. The story of a mechanism-based solution to an irreproducible synthesis resulting in an unexpected closed-system requirement for the LiBEt3H-based reduction: The case of the novel subnanometer cluster, [Ir(1,5-COD)(μ-H)]4, and the resulting improved, independently repeatable, reliable synthesis. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.04.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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15
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Kumar P, Kashid VS, Reddi Y, Mague JT, Sunoj RB, Balakrishna MS. A phosphomide based PNP ligand, 2,6-{Ph2PC(O)}2(C5H3N), showing PP, PNP and PNO coordination modes. Dalton Trans 2015; 44:4167-79. [DOI: 10.1039/c4dt03960b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Coordination chemistry of a versatile phosphomide ligand, 2,6-{Ph2PC(O)}2(C5H3N), is described.
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Affiliation(s)
- Pawan Kumar
- Phosphorus Laboratory
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
| | - Vitthalrao S. Kashid
- Phosphorus Laboratory
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
| | - Yernaidu Reddi
- Phosphorus Laboratory
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
| | - Joel T. Mague
- Department of Chemistry
- Tulane University
- New Orleans
- USA
| | - Raghavan B. Sunoj
- Phosphorus Laboratory
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
| | - Maravanji S. Balakrishna
- Phosphorus Laboratory
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400 076
- India
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16
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Tanabe Y, Kuriyama S, Arashiba K, Nakajima K, Nishibayashi Y. Synthesis and Reactivity of Ruthenium Complexes Bearing Arsenic-Containing Arsenic-Nitrogen-Arsenic-Type Pincer Ligand. Organometallics 2014. [DOI: 10.1021/om5006116] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yoshiaki Tanabe
- Institute of Engineering
Innovation, School of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Shogo Kuriyama
- Institute of Engineering
Innovation, School of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kazuya Arashiba
- Institute of Engineering
Innovation, School of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kazunari Nakajima
- Institute of Engineering
Innovation, School of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Yoshiaki Nishibayashi
- Institute of Engineering
Innovation, School of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
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17
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Miyake Y, Nakajima K, Higuchi Y, Nishibayashi Y. Synthesis and Redox Properties of PNP Pincer Complexes Based onN-Methyl-4,4′-bipyridinium. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402349] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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18
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Kuriyama S, Arashiba K, Nakajima K, Tanaka H, Kamaru N, Yoshizawa K, Nishibayashi Y. Catalytic Formation of Ammonia from Molecular Dinitrogen by Use of Dinitrogen-Bridged Dimolybdenum–Dinitrogen Complexes Bearing PNP-Pincer Ligands: Remarkable Effect of Substituent at PNP-Pincer Ligand. J Am Chem Soc 2014; 136:9719-31. [DOI: 10.1021/ja5044243] [Citation(s) in RCA: 168] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Shogo Kuriyama
- Institute
of Engineering Innovation, School of Engineering, The University of Tokyo, Yayoi,
Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kazuya Arashiba
- Institute
of Engineering Innovation, School of Engineering, The University of Tokyo, Yayoi,
Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kazunari Nakajima
- Institute
of Engineering Innovation, School of Engineering, The University of Tokyo, Yayoi,
Bunkyo-ku, Tokyo 113-8656, Japan
| | - Hiromasa Tanaka
- Elements
Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Nishikyo-ku, Kyoto 615-8520, Japan
| | - Nobuaki Kamaru
- Institute
for Materials Chemistry and Engineering and International Research
Center for Molecular System, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
| | - Kazunari Yoshizawa
- Elements
Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Nishikyo-ku, Kyoto 615-8520, Japan
- Institute
for Materials Chemistry and Engineering and International Research
Center for Molecular System, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
| | - Yoshiaki Nishibayashi
- Institute
of Engineering Innovation, School of Engineering, The University of Tokyo, Yayoi,
Bunkyo-ku, Tokyo 113-8656, Japan
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19
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Arashiba K, Nakajima K, Nishibayashi Y. Synthesis and Reactivity of Molybdenum-Dinitrogen Complexes Bearing PNN-Type Pincer Ligand. Z Anorg Allg Chem 2014. [DOI: 10.1002/zaac.201400117] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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20
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Tanaka H, Arashiba K, Kuriyama S, Sasada A, Nakajima K, Yoshizawa K, Nishibayashi Y. Unique behaviour of dinitrogen-bridged dimolybdenum complexes bearing pincer ligand towards catalytic formation of ammonia. Nat Commun 2014; 5:3737. [PMID: 24769530 PMCID: PMC4015321 DOI: 10.1038/ncomms4737] [Citation(s) in RCA: 135] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Accepted: 03/27/2014] [Indexed: 12/23/2022] Open
Abstract
It is vital to design effective nitrogen fixation systems that operate under mild
conditions, and to this end we recently reported an example of the catalytic
formation of ammonia using a
dinitrogen-bridged dimolybdenum
complex bearing a pincer ligand, where up to twenty three equivalents of
ammonia were produced based on
the catalyst. Here we study the origin of the catalytic behaviour of the
dinitrogen-bridged dimolybdenum
complex bearing the pincer ligand with density functional theory calculations, based
on stoichiometric and catalytic formation of ammonia from molecular dinitrogen under ambient conditions. Comparison of di- and
mono-molybdenum systems shows that the dinitrogen-bridged dimolybdenum core structure plays a critical
role in the protonation of the coordinated molecular dinitrogen in the catalytic cycle. Research into molecular catalysts for conversion of nitrogen into
ammonia under mild conditions is ongoing. Here, the authors synthesize a
dimolybdenum–nitride complex and verify the role of the dimetallic core in
the protonation of the coordinated dinitrogen.
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Affiliation(s)
- Hiromasa Tanaka
- 1] Institute for Materials Chemistry and Engineering and International Research Center for Molecular Systems, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan [2] Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Nishikyo-ku, Kyoto 615-8520, Japan [3]
| | - Kazuya Arashiba
- 1] Institute of Engineering Innovation, School of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan [2]
| | - Shogo Kuriyama
- Institute of Engineering Innovation, School of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Akira Sasada
- 1] Institute for Materials Chemistry and Engineering and International Research Center for Molecular Systems, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan [2] Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Nishikyo-ku, Kyoto 615-8520, Japan
| | - Kazunari Nakajima
- Institute of Engineering Innovation, School of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Kazunari Yoshizawa
- 1] Institute for Materials Chemistry and Engineering and International Research Center for Molecular Systems, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan [2] Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Nishikyo-ku, Kyoto 615-8520, Japan
| | - Yoshiaki Nishibayashi
- Institute of Engineering Innovation, School of Engineering, The University of Tokyo, Yayoi, Bunkyo-ku, Tokyo 113-8656, Japan
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Nishibayashi Y, Arashiba K, Yuki M. Recent Progress in Catalytic Nitrogen Fixation by Using Transition Metal-Dinitrogen Complexes. J SYN ORG CHEM JPN 2014. [DOI: 10.5059/yukigoseikyokaishi.72.529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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