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Isaac C, Miloserdov FM, Pécharman AF, Lowe JP, McMullin CL, Whittlesey MK. Structure and Reactivity of [Ru-Al] and [Ru-Sn] Heterobimetallic PPh 3-Based Complexes. Organometallics 2022; 41:2716-2730. [PMID: 36249448 PMCID: PMC9554919 DOI: 10.1021/acs.organomet.2c00344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Indexed: 11/30/2022]
Abstract
Treatment of [Ru(PPh3)(C6H4PPh2)2H][Li(THF)2] with AlMe2Cl and SnMe3Cl leads to elimination of LiCl and CH4 and formation of the heterobimetallic complexes [Ru(C6H4PPh2)2{PPh2C6H4AlMe(THF)}H] 5 and [Ru(PPh3)(C6H4PPh2)(PPh2C6H4SnMe2)] 6, respectively. The pathways to 5 and 6 have been probed by variable temperature NMR studies, together with input from DFT calculations. Complete reaction of H2 occurs with 5 at 60 °C and with 6 at room temperature to yield the spectroscopically characterized trihydride complexes [Ru(PPh2)2{PPh2C6H4AlMe}H3] 7 and [Ru(PPh2)2{PPh2C6H4SnMe2}H3] 8. In the presence of CO, 6 forms the acylated phosphine complex, [Ru(CO)2(C(O)C6H4PPh2)(PPh2C6H4SnMe2)] 9, through a series of intermediates that were identified by NMR spectroscopy in conjunction with 13CO labeling. Complex 6 undergoes addition and substitution reactions with the N-heterocyclic carbene 1,3,4,5-tetramethylimidazol-2-ylidene (IMe4) to give [Ru(IMe4)2(PPh2C6H4)(PPh2C6H4SnMe2)] 10, which converted via rare N-Me group C-H activation to [Ru(IMe4)(PPh3)(IMe4)'(PPh2C6H4SnMe2)] 11 upon heating at 60 °C and to a mixture of [Ru(IMe4)2(IMe4)'(PPh2C6H4SnMe2)] 12 and [Ru(PPh3)(PPh2C6H4)(IMe4-SnMe2)'] 13 at 120 °C.
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Affiliation(s)
- Connie
J. Isaac
- Department of Chemistry, University
of Bath, Bath BA2 7AY, U.K.
| | | | | | - John P. Lowe
- Department of Chemistry, University
of Bath, Bath BA2 7AY, U.K.
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Dong W, Yang D, Mei T, Wang B, Qu J. Reversible Binding of Dinitrogen on a Thiolate-Bridged Cobalt-Ruthenium Complex Supported by a Flexible Bidentate Phosphine Ligand. Dalton Trans 2022; 51:9978-9982. [DOI: 10.1039/d2dt01534j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A well-defined thiolate-bridged cobalt-ruthenium complex is demonstrated to reversibly bind N2 by modulation of the auxiliary phosphine ligand, which is evidenced by time-dependent 1H NMR spectroscopy at different temperatures. Notably,...
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Roy MMD, Omaña AA, Wilson ASS, Hill MS, Aldridge S, Rivard E. Molecular Main Group Metal Hydrides. Chem Rev 2021; 121:12784-12965. [PMID: 34450005 DOI: 10.1021/acs.chemrev.1c00278] [Citation(s) in RCA: 132] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
This review serves to document advances in the synthesis, versatile bonding, and reactivity of molecular main group metal hydrides within Groups 1, 2, and 12-16. Particular attention will be given to the emerging use of said hydrides in the rapidly expanding field of Main Group element-mediated catalysis. While this review is comprehensive in nature, focus will be given to research appearing in the open literature since 2001.
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Affiliation(s)
- Matthew M D Roy
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - Alvaro A Omaña
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
| | - Andrew S S Wilson
- Department of Chemistry, University of Bath, Avon BA2 7AY, United Kingdom
| | - Michael S Hill
- Department of Chemistry, University of Bath, Avon BA2 7AY, United Kingdom
| | - Simon Aldridge
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QR, United Kingdom
| | - Eric Rivard
- Department of Chemistry, University of Alberta, 11227 Saskatchewan Drive, Edmonton, Alberta T6G 2G2, Canada
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Ayyappan R, Saha K, Grellier M, Clot E, Vendier L, Ghosh S, Sabo-Etienne S, Bontemps S. Impact of the Alkali Metal on the Structural and Dynamic Properties of the Anionic Pentahydride Ruthenium Complexes [M(THF) x][RuH 5(PCy 3) 2] (M = Li, Na, K). Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ramaraj Ayyappan
- LCC−CNRS, Université de Toulouse, CNRS, F-31077 CEDEX 4 Toulouse, France
| | - Koushik Saha
- LCC−CNRS, Université de Toulouse, CNRS, F-31077 CEDEX 4 Toulouse, France
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Mary Grellier
- LCC−CNRS, Université de Toulouse, CNRS, F-31077 CEDEX 4 Toulouse, France
| | - Eric Clot
- ICGM, Univ Montpellier, CNRS, ENSCM, 34000 Montpellier, France
| | - Laure Vendier
- LCC−CNRS, Université de Toulouse, CNRS, F-31077 CEDEX 4 Toulouse, France
| | - Sundargopal Ghosh
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India
| | | | - Sébastien Bontemps
- LCC−CNRS, Université de Toulouse, CNRS, F-31077 CEDEX 4 Toulouse, France
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Pachisia S, Kishan R, Yadav S, Gupta R. Half-Sandwich Ruthenium Complexes of Amide-Phosphine Based Ligands: H-Bonding Cavity Assisted Binding and Reduction of Nitro-substrates. Inorg Chem 2021; 60:2009-2022. [PMID: 33459009 DOI: 10.1021/acs.inorgchem.0c03505] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We present synthesis and characterization of two half-sandwich Ru(II) complexes supported with amide-phosphine based ligands. These complexes presented a pyridine-2,6-dicarboxamide based pincer cavity, decorated with hydrogen bonds, that participated in the binding of nitro-substrates closer to the Ru(II) centers, which is further supported with binding and docking studies. These ruthenium complexes functioned as the noteworthy catalysts for the borohydride mediated reduction of assorted nitro-substrates. Mechanistic studies not only confirmed the intermediacy of [Ru-H] in the reduction but also asserted the involvement of several organic intermediates during the course of the catalysis. A similar Ru(II) complex that lacked pyridine-2,6-dicarboxamide based pincer cavity substantiated its unique role both in the substrate binding and the subsequent catalysis.
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Affiliation(s)
- Sanya Pachisia
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Ram Kishan
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Samanta Yadav
- Department of Chemistry, University of Delhi, Delhi 110007, India
| | - Rajeev Gupta
- Department of Chemistry, University of Delhi, Delhi 110007, India
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Hooper TN, Lau S, Chen W, Brown RK, Garçon M, Luong K, Barrow NS, Tatton AS, Sackman GA, Richardson C, White AJP, Cooper RI, Edwards AJ, Casely IJ, Crimmin MR. The partial dehydrogenation of aluminium dihydrides. Chem Sci 2019; 10:8083-8093. [PMID: 31762968 PMCID: PMC6855256 DOI: 10.1039/c9sc02750e] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 08/12/2019] [Indexed: 11/21/2022] Open
Abstract
The reactions of a series of β-diketiminate stabilised aluminium dihydrides with ruthenium bis(phosphine), palladium bis(phosphine) and palladium cyclopentadienyl complexes is reported. In the case of ruthenium, alane coordination occurs with no evidence for hydrogen loss resulting in the formation of ruthenium complexes with a pseudo-octahedral geometry and cis-relation of phosphine ligands. These new ruthenium complexes have been characterised by multinuclear and variable temperature NMR spectroscopy, IR spectroscopy and single crystal X-ray diffraction. In the case of palladium, a series of structural snapshots of alane dehydrogenation have been isolated and crystallographically characterised. Variation of the palladium precursor and ligand on aluminium allows kinetic control over reactivity and isolation of intermetallic complexes that contain new Pd-Al and Pd-Pd interactions. These complexes differ by the ratio of H : Al (2 : 1, 1.5 : 1 and 1 : 1) with lower hydride content species forming with dihydrogen loss. A combination of X-ray and neutron diffraction studies have been used to interrogate the structures and provide confidence in the assignment of the number and position of hydride ligands. 27Al MAS NMR spectroscopy and calculations (DFT, QTAIM) have been used to gain an understanding of the dehydrogenation processes. The latter provide evidence for dehydrogenation being accompanied by metal-metal bond formation and an increased negative charge on Al due to the covalency of the new metal-metal bonds. To the best of our knowledge, we present the first structural information for intermediate species in alane dehydrogenation including a rare neutron diffraction study of a palladium-aluminium hydride complex. Furthermore, as part of these studies we have obtained the first SS 27Al NMR data on an aluminium(i) complex. Our findings are relevant to hydrogen storage, materials chemistry and catalysis.
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Affiliation(s)
- Thomas N Hooper
- Department of Chemistry , Molecular Sciences Research Hub , Imperial College London , 80 Wood Lane, Shepherds Bush , London , W12 0BZ , UK .
| | - Samantha Lau
- Department of Chemistry , Molecular Sciences Research Hub , Imperial College London , 80 Wood Lane, Shepherds Bush , London , W12 0BZ , UK .
| | - Wenyi Chen
- Department of Chemistry , Molecular Sciences Research Hub , Imperial College London , 80 Wood Lane, Shepherds Bush , London , W12 0BZ , UK .
| | - Ryan K Brown
- Department of Chemistry , Molecular Sciences Research Hub , Imperial College London , 80 Wood Lane, Shepherds Bush , London , W12 0BZ , UK .
| | - Martí Garçon
- Department of Chemistry , Molecular Sciences Research Hub , Imperial College London , 80 Wood Lane, Shepherds Bush , London , W12 0BZ , UK .
| | - Karen Luong
- Department of Chemistry , Molecular Sciences Research Hub , Imperial College London , 80 Wood Lane, Shepherds Bush , London , W12 0BZ , UK .
| | - Nathan S Barrow
- Johnson Matthey Technology Centre , Blounts Court, Sonning Common , Reading , RG4 9NH , UK
| | - Andrew S Tatton
- Department of Materials , University of Oxford , OX1 3PH , UK
| | - George A Sackman
- Australian Centre for Neutron Scattering , Australian Nuclear Science and Technology Organisation , Australia
- Chemical Crystallography , Department of Chemistry , University of Oxford , 12 Mansfield Road , Oxford , OX1 3TA , UK
| | | | - Andrew J P White
- Department of Chemistry , Molecular Sciences Research Hub , Imperial College London , 80 Wood Lane, Shepherds Bush , London , W12 0BZ , UK .
| | - Richard I Cooper
- Chemical Crystallography , Department of Chemistry , University of Oxford , 12 Mansfield Road , Oxford , OX1 3TA , UK
| | - Alison J Edwards
- Australian Centre for Neutron Scattering , Australian Nuclear Science and Technology Organisation , Australia
| | - Ian J Casely
- Johnson Matthey Technology Centre , Blounts Court, Sonning Common , Reading , RG4 9NH , UK
| | - Mark R Crimmin
- Department of Chemistry , Molecular Sciences Research Hub , Imperial College London , 80 Wood Lane, Shepherds Bush , London , W12 0BZ , UK .
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Liu CG, Chu YJ. Activation mechanism of hydrogen peroxide by a divanadium-substituted polyoxometalate [γ-PV 2W 10O 38(μ-OH) 2] 3-: A computational study. J Mol Graph Model 2018; 85:56-67. [PMID: 30077051 DOI: 10.1016/j.jmgm.2018.07.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Revised: 07/17/2018] [Accepted: 07/18/2018] [Indexed: 11/18/2022]
Abstract
In the present paper, the reaction mechanism corresponding to activation of hydrogen peroxide (H2O2) by a divanadium-substituted polyoxometalate (POM) [γ-PV2W10O38(μ-OH)2]3- (I) to form catalytic active species, peroxo complex [γ-PV2W10O38(μ-η2,η2-O2)]3- (III), was studied by using the density functional theory (DFT) calculations method with B3LYP functional. The results indicate that coordination of H2O2 to I proceeds via a vanadium-center-assisted proton transfer pathway to remove the first water molecule and form a hydroperoxy intermediate [γ-PV2W10O38(μ-OH) (μ-OOH)]3- (II). And intermediate II occurs through three successive water-assisted proton transfer steps to remove the second water molecule and finally forms catalytic active species. The calculated overall energy profiles show that coordination of H2O2 to vanadium center requires a proton transfer barrier of about 24 kcal mol-1. A detailed comparison of molecular geometries and electronic structure shows that the catalytic active species has a very interesting structural feature, where a superoxide radical (O2-) was embedded into two vanadium centers, and may be a potential nucleophile. The unique withdrawing electron properties and flexible bonding ability of the γ-Keggin-type POM ligand contribute to the formation of O2- radical. The tunable alternate arrangement of W-O bond series in γ-Keggin-type POM ligand contributes to the flexibility of the γ-Keggin-type POM ligand. Meanwhile, our DFT calculations show a good performance of B3LYP-gauge-independent atomic orbital (IGAIM) method for the calculation of 1H NMR parameters of divanadium-substituted phosphotungstate.
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Affiliation(s)
- Chun-Guang Liu
- College of Chemical Engineering, Northeast Electric Power University, Jilin City, 132012, PR China.
| | - Yun-Jie Chu
- College of Chemical Engineering, Northeast Electric Power University, Jilin City, 132012, PR China
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9
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Butler MJ, Crimmin MR. Magnesium, zinc, aluminium and gallium hydride complexes of the transition metals. Chem Commun (Camb) 2017; 53:1348-1365. [PMID: 28070586 PMCID: PMC5777540 DOI: 10.1039/c6cc05702k] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Accepted: 12/23/2016] [Indexed: 12/21/2022]
Abstract
The preparation and applications of heterobimetallic complexes continue to occupy researchers in the fields of organometallic, main group, and coordination chemistry. This interest stems from the promise these complexes hold as precursors to materials, reagents in synthesis and as new catalysis. Here we survey and organise the state-of-the-art understanding of the TM-H-M linkage (M = Mg, Zn, Al, Ga). We discuss the structure and bonding in these complexes, their known reactivity, and their largely unrealised potential in catalysis.
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Affiliation(s)
- Michael J Butler
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, UK.
| | - Mark R Crimmin
- Department of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, UK.
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10
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Small molecule binding and activation on a cationic ruthenium center of a pincer complex. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.10.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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11
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Liu CG, Liu S, Zheng T. Computational Study of Metal–Dinitrogen Keggin-Type Polyoxometalate Complexes [PW11O39MIIN2)]5– (M = Ru, Os, Re, Ir): Bonding Nature and Dinitrogen Splitting. Inorg Chem 2015; 54:7929-35. [DOI: 10.1021/acs.inorgchem.5b01002] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Chun-Guang Liu
- College of Chemical Engineering, Northeast Dianli University, No. 169 Changchun Road, Jilin City, 132012, P. R. China
| | - Shuang Liu
- College of Chemical Engineering, Northeast Dianli University, No. 169 Changchun Road, Jilin City, 132012, P. R. China
| | - Ting Zheng
- College of Chemical Engineering, Northeast Dianli University, No. 169 Changchun Road, Jilin City, 132012, P. R. China
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Wang L, Sun H, Li X. Synthesis of Iron Hydrides by Selective C-F/C-H Bond Activation in Fluoroarylimines and Their Applications in Catalytic Reduction Reactions. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500313] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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