1
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Agrawal NK, Gayathridevi S, Dash SR, Vanka K, Jagirdar BR. H-atom site exchange in an iridium trans-dihydrogen/hydride complex, trans-[Ir(H)(η 2-H 2) (iPr)4(POCOP)(DMAP)] . Dalton Trans 2023; 52:13858-13863. [PMID: 37743752 DOI: 10.1039/d3dt02366d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/26/2023]
Abstract
Treatment of trans-[Ir(H)(N)2(iPr)4(POCOP)(DMAP)][BAr4f] (2) with H2 (1 bar) under ambient conditions (298 K) results in the formation of a trans-[Ir(H)(η2-H2)(iPr)4(POCOP)(DMAP)][BAr4f] (3) complex. Complex 3 exhibits H-atom site exchange between the bound H2 and the hydride ligands which are mutually trans to one another. A plausible mechanism of this exchange involves metal-ligand cooperativity as studied by computations.
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Affiliation(s)
- Nisha K Agrawal
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India.
| | - S Gayathridevi
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Soumya R Dash
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Kumar Vanka
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411 008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201 002, India
| | - Balaji R Jagirdar
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India.
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2
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Agrawal NK, Dash SR, Vanka K, Jagirdar BR. Dual Routes toward Observation of a trans-H 2/Hydride Complex in an Iridium Pincer System and Hydrogenation Catalytic Activity. Organometallics 2023. [DOI: 10.1021/acs.organomet.2c00641] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Affiliation(s)
- Nisha K. Agrawal
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Soumya R. Dash
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Kumar Vanka
- Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory, Pune 411008, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Balaji R. Jagirdar
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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3
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Poole EW, Bustos I, Hood TM, Smart JE, Chaplin AB. Iridium complexes of an ortho-trifluoromethylphenyl substituted PONOP pincer ligand. Dalton Trans 2023; 52:1096-1104. [PMID: 36602231 PMCID: PMC9872493 DOI: 10.1039/d2dt03608h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The synthesis and iridium coordination chemistry of a new pyridine-based phosphinito pincer ligand 2,6-(ArF2PO)2C5H3N (PONOP-ArF; ArF = 2-(CF3)C6H4) are described, where the P-donors have ortho-trifluoromethylphenyl substituents. The iridium(III) 2,2'-biphenyl (biph) derivative [Ir(PONOP-ArF)(biph)Cl] was obtained by reaction with [Ir(biph)(COD)Cl]2 (COD = 1,5-cyclooctadiene) and subsequent halide ion abstraction enabled isolation of [Ir(PONOP-ArF)(biph)]+ which features an Ir ← F-C bonding interaction in the solid state. Hydrogenolysis of the biphenyl ligand and formation of [Ir(PONOP-ArF)(H)2]+ was achieved by prolonged reaction of [Ir(PONOP-ArF)(biph)]+ with dihydrogen. This transformation paved the way for isolation and crystallographic characterisation of low valent iridium derivatives through treatment of the dihydride with tert-butylethylene (TBE). The iridium(I) π-complex [Ir(PONOP-ArF)(TBE)]+ is thermally stable but substitution of TBE can be achieved by reaction with carbon monoxide. The solid-state structure of the mono-carbonyl product [Ir(PONOP-ArF)(CO)]+ is notable for an intermolecular anagostic interaction between the metal centre and a pentane molecule which co-crystallises within a cleft defined by two aryl phosphine substituents.
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Affiliation(s)
- Ethan W. Poole
- Department of Chemistry, University of WarwickGibbet Hill RoadCoventry CV4 7ALUK
| | - Itxaso Bustos
- Department of Chemistry, University of WarwickGibbet Hill RoadCoventry CV4 7ALUK,Facultad de Química de San Sebastián, Universidad del País Vasco (UPV/EHU)Apdo. 107220080 San SebastiánSpain
| | - Thomas M. Hood
- Department of Chemistry, University of WarwickGibbet Hill RoadCoventry CV4 7ALUK
| | - Jennifer E. Smart
- Department of Chemistry, University of WarwickGibbet Hill RoadCoventry CV4 7ALUK
| | - Adrian B. Chaplin
- Department of Chemistry, University of WarwickGibbet Hill RoadCoventry CV4 7ALUK
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4
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Gupta P, Drexler HJ, Wingad R, Wass D, Baráth E, Beweries T, Hering-Junghans C. P,N-type phosphaalkene-based Ir( i) complexes: synthesis, coordination chemistry, and catalytic applications. Inorg Chem Front 2023. [DOI: 10.1039/d3qi00142c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
Iridium P,N phosphaalkene complexes show a rich coordination chemistry with unusual twofold C–H activation. The Ir(i) chloride complex can be applied for C–N coupling and alcohol upgrading reactions.
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5
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Royle CG, Sotorrios L, Gyton MR, Brodie CN, Burnage AL, Furfari SK, Marini A, Warren MR, Macgregor SA, Weller AS. Single-Crystal to Single-Crystal Addition of H 2 to [Ir( iPr-PONOP)(propene)][BAr F4] and Comparison Between Solid-State and Solution Reactivity. Organometallics 2022; 41:3270-3280. [DOI: 10.1021/acs.organomet.2c00274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Cameron G. Royle
- Department of Chemistry, University of York, Heslington YO10 5DD, York, U.K
- Department of Chemistry, University of Oxford, Mansfield Road, Oxford OX1 3TA, U.K
| | - Lia Sotorrios
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
| | - Matthew R. Gyton
- Department of Chemistry, University of York, Heslington YO10 5DD, York, U.K
| | - Claire N. Brodie
- Department of Chemistry, University of York, Heslington YO10 5DD, York, U.K
| | - Arron L. Burnage
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
| | | | - Anna Marini
- Diamond Light Source Ltd, Didcot OX11 0DE, U.K
- Department of Chemistry, University of Southampton, Southampton SO17 1BJ, U.K
| | | | - Stuart A. Macgregor
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, U.K
| | - Andrew S. Weller
- Department of Chemistry, University of York, Heslington YO10 5DD, York, U.K
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6
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Agrawal NK, Dash SR, Vanka K, Nethaji M, Jagirdar BR. Reactivity of four coordinate iridium complex towards hydrogen: an experimental and computational study. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2022.122317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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7
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Perutz RN, Sabo‐Etienne S, Weller AS. Metathesis by Partner Interchange in σ‐Bond Ligands: Expanding Applications of the σ‐CAM Mechanism. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202111462] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
| | - Sylviane Sabo‐Etienne
- CNRS LCC (Laboratoire de Chimie de Coordination) 205 route de Narbonne, BP 44099 F-31077 Toulouse Cedex 4 France
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8
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Perutz RN, Sabo-Etienne S, Weller AS. Metathesis by Partner Interchange in σ-Bond Ligands: Expanding Applications of the σ-CAM Mechanism. Angew Chem Int Ed Engl 2021; 61:e202111462. [PMID: 34694734 PMCID: PMC9299125 DOI: 10.1002/anie.202111462] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Indexed: 12/13/2022]
Abstract
In 2007 two of us defined the σ‐Complex Assisted Metathesis mechanism (Perutz and Sabo‐Etienne, Angew. Chem. Int. Ed. 2007, 46, 2578–2592), that is, the σ‐CAM concept. This new approach to reaction mechanisms brought together metathesis reactions involving the formation of a variety of metal–element bonds through partner‐interchange of σ‐bond complexes. The key concept that defines a σ‐CAM process is a single transition state for metathesis that is connected by two intermediates that are σ‐bond complexes while the oxidation state of the metal remains constant in precursor, intermediates and product. This mechanism is appropriate in situations where σ‐bond complexes have been isolated or computed as well‐defined minima. Unlike several other mechanisms, it does not define the nature of the transition state. In this review, we highlight advances in the characterization and dynamic rearrangements of σ‐bond complexes, most notably alkane and zincane complexes, but also different geometries of silane and borane complexes. We set out a selection of catalytic and stoichiometric examples of the σ‐CAM mechanism that are supported by strong experimental and/or computational evidence. We then draw on these examples to demonstrate that the scope of the σ‐CAM mechanism has expanded to classes of reaction not envisaged in 2007 (additional σ‐bond ligands, agostic complexes, sp2‐carbon, surfaces). Finally, we provide a critical comparison to alternative mechanisms for metathesis of metal–element bonds.
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Affiliation(s)
- Robin N Perutz
- Department of Chemistry, University of York, York, YO10 5DD, UK
| | - Sylviane Sabo-Etienne
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, BP 44099, F-31077, Toulouse Cedex 4, France
| | - Andrew S Weller
- Department of Chemistry, University of York, York, YO10 5DD, UK
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9
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Robinson S, Puddephatt RJ. Reactions of organoplatinum complexes with dimethylamine-borane. NEW J CHEM 2021. [DOI: 10.1039/d0nj03168b] [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
Reactions of organoplatinum complexes with dimethylamineborane are reported.
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Affiliation(s)
- Shawn Robinson
- Department of Chemistry, University of Western Ontario, London, N6A 5B7, Canada
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10
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Scheerder AR, Lutz M, Broere DLJ. Unexpected reactivity of a PONNOP 'expanded pincer' ligand. Chem Commun (Camb) 2020; 56:8198-8201. [PMID: 32395727 DOI: 10.1039/d0cc02166k] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the synthesis, characterization and coordination chemistry of a new naphthyridine-derived phosphinite PONNOP expanded pincer ligand. As envisioned, the dinucleating ligand readily binds two copper(i) centers in close proximity, but undergoes an unexpected rearrangement in the presence of nickel(ii) salts to form an interesting PONNP pincer platform.
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Affiliation(s)
- Arthur R Scheerder
- Organic Chemistry and Catalysis, Debye Institute for Nanomaterials Science Faculty of Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands.
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11
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Schmitz D, Kalter M, Dunbar AC, Vöst M, Fischer A, Batke K, Eickerling G, Ruhland K, Ebad‐Allah J, Kuntscher C, Scherer W. Pressure‐Enhanced C–H Bond Activation in Chloromethane Platinum(II) Complexes. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201901117] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Dominik Schmitz
- Institut für Physik Universität Augsburg Universitätsstr. 1 86135 Augsburg Germany
| | - Marcel Kalter
- Institut für Physik Universität Augsburg Universitätsstr. 1 86135 Augsburg Germany
| | - Andrew C. Dunbar
- Institut für Physik Universität Augsburg Universitätsstr. 1 86135 Augsburg Germany
| | - Marcel Vöst
- Institut für Physik Universität Augsburg Universitätsstr. 1 86135 Augsburg Germany
| | - Andreas Fischer
- Institut für Physik Universität Augsburg Universitätsstr. 1 86135 Augsburg Germany
| | - Kilian Batke
- Institut für Physik Universität Augsburg Universitätsstr. 1 86135 Augsburg Germany
| | - Georg Eickerling
- Institut für Physik Universität Augsburg Universitätsstr. 1 86135 Augsburg Germany
| | - Klaus Ruhland
- Institut für Physik Universität Augsburg Universitätsstr. 1 86135 Augsburg Germany
| | - Jihaan Ebad‐Allah
- Institut für Physik Universität Augsburg Universitätsstr. 1 86135 Augsburg Germany
- Department of Physics Tanta University 31527 Tanta Egypt
| | - Christine Kuntscher
- Institut für Physik Universität Augsburg Universitätsstr. 1 86135 Augsburg Germany
| | - Wolfgang Scherer
- Institut für Physik Universität Augsburg Universitätsstr. 1 86135 Augsburg Germany
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12
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Hood TM, Leforestier B, Gyton MR, Chaplin AB. Synthesis and Structural Dynamics of Five-Coordinate Rh(III) and Ir(III) PNP and PONOP Pincer Complexes. Inorg Chem 2019; 58:7593-7601. [PMID: 31117634 PMCID: PMC6549213 DOI: 10.1021/acs.inorgchem.9b00957] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The synthesis and characterization of a homologous series of five-coordinate rhodium(III) and iridium(III) complexes of PNP (2,6-( tBu2PCH2)2C5H3N) and PONOP (2,6-( tBu2PO)2C5H3N) pincer ligands are described: [M(PNP)(biph)][BArF4] (M = Rh, 1a; Ir, 1b; biph = 2,2'-biphenyl; ArF = 3,5-(CF3)2C6H3) and [M(PONOP)(biph)][BArF4] (M = Rh, 2a; Ir, 2b). These complexes are structurally dynamic in solution, exhibiting pseudorotation of the biph ligand on the 1H NMR time scale (Δ G⧧ ca. 60 kJ mol-1) and, in the case of the flexible PNP complexes, undergoing interconversion between helical and puckered pincer ligand conformations (Δ G⧧ ca. 10 kJ mol-1). Remarkably, the latter is sufficiently facile that it persists in the solid state, leading to temperature-dependent disorder in the associated X-ray crystal structures. Reaction of 1 and 2 with CO occurs for the iridium congeners 1b and 2b, leading to the formation of sterically congested carbonyl derivatives.
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Affiliation(s)
- Thomas M Hood
- Department of Chemistry , University of Warwick , Gibbet Hill Road , Coventry CV4 7AL , U.K
| | - Baptiste Leforestier
- Department of Chemistry , University of Warwick , Gibbet Hill Road , Coventry CV4 7AL , U.K
| | - Matthew R Gyton
- Department of Chemistry , University of Warwick , Gibbet Hill Road , Coventry CV4 7AL , U.K
| | - Adrian B Chaplin
- Department of Chemistry , University of Warwick , Gibbet Hill Road , Coventry CV4 7AL , U.K
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13
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Lekich TT, Gary JB, Bellows SM, Cundari TR, Guard LM, Heinekey DM. H 2 addition to ( Me4PCP)Ir(CO): studies of the isomerization mechanism. Dalton Trans 2018; 47:16119-16125. [PMID: 30377682 DOI: 10.1039/c8dt02861c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Reduced steric demand of the Me4PCP pincer ligand (PCP = κ3-C6H4-1,3-[CH2PR2]2, R = Me), allows for a more open metal center. This is evident through structure and reactivity comparisons between (Me4PCP)Ir derivatives and other (R4PCP)Ir complexes (R = tBu, iPr, CF3). In particular, isomerization from cis-(R4PCP)Ir(H)2(CO) to trans-(R4PCP)Ir(H)2(CO) is more facile when R = Me than when R = iPr. Deuterium incorporation in the hydride ligands from solvent C6D6 was observed during this isomerization when R = Me. This deuterium exchange has not been observed for other analogous R4PCP iridium complexes. A kinetic study of the cis/trans isomerization combined with computational studies suggests that the cis/trans isomerization proceeds through a migratory-insertion pathway involving a formyl intermediate.
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Affiliation(s)
- Travis T Lekich
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700, USA
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14
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Wu Z, Xiang C, Zhang Y, Song Z, Lei Q, Fang W, Xie H. The reactivity of coordinatively unsaturated iridium methylene complex Ir CH2[N(SiMe2CH2PPh2)2]: A quantum chemistry study. COMPUT THEOR CHEM 2018. [DOI: 10.1016/j.comptc.2018.06.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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15
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Anderson NH, Boncella JM, Tondreau AM. Reactivity of Silanes with (
t
Bu
PONOP)Ruthenium Dichloride: Facile Synthesis of Chloro-Silyl Ruthenium Compounds and Formic Acid Decomposition. Chemistry 2017; 23:13617-13622. [DOI: 10.1002/chem.201703722] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Nickolas H. Anderson
- Los Alamos National Laboratory; MPA Division; MS J514 Los Alamos New Mexico 87545 United States
| | - James M. Boncella
- Los Alamos National Laboratory; MPA Division; MS J514 Los Alamos New Mexico 87545 United States
| | - Aaron M. Tondreau
- Los Alamos National Laboratory; MPA Division; MS J514 Los Alamos New Mexico 87545 United States
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16
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17
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Li Z, Xia M, Boyd RJ. Theoretical study on the mechanism of iridium-catalyzed γ-functionalization of primary alkyl C–H bonds. CAN J CHEM 2016. [DOI: 10.1139/cjc-2016-0287] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The mechanism of the iridium-catalyzed functionalization of a primary C–H bond at the γ position of an alcohol 5 is investigated by density functional theory (DFT) calculations. A new IrIII–IrV mechanism is found to be more feasible than the previously reported IrI–IrIII mechanism. 10 In the IrIII–IrV mechanism, the reaction begins with the initial formation of (Me4phen)IrIII(H)[Si(OR)Et2]2 from the catalyst precursor, [Ir(cod)OMe]2 (cod = 1,5-cyclooctadiene). The catalytic cycle includes five steps: (1) the insertion of norbornene into the Ir–H bond to produce (Me4phen)IrIII(norbornyl)[Si(OR)Et2]2 (R = –CH(C2H5)C3H7); (2) the Si–H oxidative addition of HSi(OR)Et2 to form (Me4phen)IrVH(norbornyl)[Si(OR)Et2]3; (3) the reductive elimination of norbornane to furnish (Me4phen)IrIII[Si(OR)Et2]3; (4) the intramolecular C–H activation of the primary C–H bond at the γ position; and (5) the Si–C reductive elimination to produce the final product and regenerate the catalyst. The highest barrier in the IrIII–IrV mechanism is 7.3 kcal/mol lower than that of the IrI–IrIII mechanism. In addition, the regioselectivity of the C–H activation predicted by this new IrIII–IrV mechanism is consistent with experimental observation.
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Affiliation(s)
- Zhe Li
- Department of Chemistry, Dalhousie University, P.O. Box 15000, Halifax, NS B3H 4R2, Canada
| | - Miaoren Xia
- CAS Key Laboratory of Nuclear Radiation and Nuclear Energy Techniques, and Multidisciplinary Initiative Center, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
| | - Russell J. Boyd
- Department of Chemistry, Dalhousie University, P.O. Box 15000, Halifax, NS B3H 4R2, Canada
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18
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Affiliation(s)
- Kathrin H. Hopmann
- Centre for Theoretical and
Computational Chemistry (CTCC) and Department of Chemistry, University of Tromsø - The Artic University of Norway, N-9037 Tromsø, Norway
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19
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Esteruelas MA, López AM, Oliván M. Polyhydrides of Platinum Group Metals: Nonclassical Interactions and σ-Bond Activation Reactions. Chem Rev 2016; 116:8770-847. [DOI: 10.1021/acs.chemrev.6b00080] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Miguel A. Esteruelas
- Departamento de
Química
Inorgánica, Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Centro de Innovación
en Química Avanzada (ORFEO−CINQA), Universidad de Zaragoza−CSIC, 50009 Zaragoza, Spain
| | - Ana M. López
- Departamento de
Química
Inorgánica, Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Centro de Innovación
en Química Avanzada (ORFEO−CINQA), Universidad de Zaragoza−CSIC, 50009 Zaragoza, Spain
| | - Montserrat Oliván
- Departamento de
Química
Inorgánica, Instituto de Síntesis Química
y Catálisis Homogénea (ISQCH), Centro de Innovación
en Química Avanzada (ORFEO−CINQA), Universidad de Zaragoza−CSIC, 50009 Zaragoza, Spain
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20
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Campos J, López-Serrano J, Peloso R, Carmona E. Methyl Complexes of the Transition Metals. Chemistry 2016; 22:6432-57. [PMID: 26991740 DOI: 10.1002/chem.201504483] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Indexed: 01/11/2023]
Abstract
Organometallic chemistry can be considered as a wide area of knowledge that combines concepts of classic organic chemistry, that is, based essentially on carbon, with molecular inorganic chemistry, especially with coordination compounds. Transition-metal methyl complexes probably represent the simplest and most fundamental way to view how these two major areas of chemistry combine and merge into novel species with intriguing features in terms of reactivity, structure, and bonding. Citing more than 500 bibliographic references, this review aims to offer a concise view of recent advances in the field of transition-metal complexes containing M-CH3 fragments. Taking into account the impressive amount of data that are continuously provided by organometallic chemists in this area, this review is mainly focused on results of the last five years. After a panoramic overview on M-CH3 compounds of Groups 3 to 11, which includes the most recent landmark findings in this area, two further sections are dedicated to methyl-bridged complexes and reactivity.
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Affiliation(s)
- Jesús Campos
- Inorganic Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford, OX1 3QR, UK
| | - Joaquín López-Serrano
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química, Avanzada (ORFEO-CINQA), Universidad de Sevilla and Consejo Superior de Investigaciones Cientificas (CSIC), Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Riccardo Peloso
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química, Avanzada (ORFEO-CINQA), Universidad de Sevilla and Consejo Superior de Investigaciones Cientificas (CSIC), Avenida Américo Vespucio 49, 41092, Sevilla, Spain
| | - Ernesto Carmona
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química, Avanzada (ORFEO-CINQA), Universidad de Sevilla and Consejo Superior de Investigaciones Cientificas (CSIC), Avenida Américo Vespucio 49, 41092, Sevilla, Spain.
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21
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Geer AM, López JA, Ciriano MA, Tejel C. Agostic versus Terminal Ethyl Rhodium Complexes: A Combined Experimental and Theoretical Study. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ana M. Geer
- Departamento
Química
Inorgánica, Instituto de Síntesis Química y Catálisis
Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna
12, 50009-Zaragoza, Spain
| | - José A. López
- Departamento
Química
Inorgánica, Instituto de Síntesis Química y Catálisis
Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna
12, 50009-Zaragoza, Spain
| | - Miguel A. Ciriano
- Departamento
Química
Inorgánica, Instituto de Síntesis Química y Catálisis
Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna
12, 50009-Zaragoza, Spain
| | - Cristina Tejel
- Departamento
Química
Inorgánica, Instituto de Síntesis Química y Catálisis
Homogénea (ISQCH), CSIC-Universidad de Zaragoza, Pedro Cerbuna
12, 50009-Zaragoza, Spain
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22
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Smith JD, Logan JR, Doyle LE, Burford RJ, Sugawara S, Ohnita C, Yamamoto Y, Piers WE, Spasyuk DM, Borau-Garcia J. Cationic mono and dicarbonyl pincer complexes of rhodium and iridium to assess the donor properties of PCcarbeneP ligands. Dalton Trans 2016; 45:12669-79. [DOI: 10.1039/c6dt02615j] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The donor properties of five different PCcarbeneP ligands are assessed by evaluation of the CO stretching frequencies in iridium(i) and rhodium(i) carbonyl cations.
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23
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Kumar R, Ramakrishnan S, Jemmis ED, Jagirdar BR. Implication of a σ-Methane Complex en Route to Elimination of Methane from a Ruthenium Complex: An Experimental and Theoretical Investigation. Organometallics 2015. [DOI: 10.1021/om501248v] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rahul Kumar
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India
| | - Shyama Ramakrishnan
- School of Chemistry, Indian Institute of Science Education & Research, Thiruvananthapuram 695 016, India
| | - Eluvathingal D. Jemmis
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India
| | - Balaji R. Jagirdar
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India
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24
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Holmes AJ, Rayner PJ, Cowley MJ, Green GGR, Whitwood AC, Duckett SB. The reaction of an iridium PNP complex with parahydrogen facilitates polarisation transfer without chemical change. Dalton Trans 2015; 44:1077-83. [PMID: 25410259 PMCID: PMC4295814 DOI: 10.1039/c4dt03088e] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Accepted: 11/07/2014] [Indexed: 11/21/2022]
Abstract
The short lived pincer complex [(C5H3N(CH2P((t)Bu)2)2)Ir(H)2(py)]BF4 is shown to be active for signal amplification by reversible exchange. This catalyst formulation enables the efficient transfer of polarization from parahydrogen to be placed into just a single molecule of the hyperpolarisation target, pyridine. When the catalysts (1)H nuclei are replaced by (2)H, increased levels of substrate hyperpolarization result and when the reverse situation is examined the catalyst itself is clearly visible through hyperpolarised signals. The ligand exchange pathways of [(C5H3N(CH2P((t)Bu)2)2)Ir(H)2(py)]BF4 that are associated with this process are shown to involve the formation of 16-electron [(C5H3N(CH2P((t)Bu)2)2)Ir(H)2]BF4 and the 18-electron H2 addition product [(C5H3N(CH2P((t)Bu)2)2)Ir(H)2(H2)]BF4.
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Affiliation(s)
- Arthur J. Holmes
- Centre for Hyperpolarization in Magnetic Resonance , University of York , York Science Park , York , YO10 5NY , UK .
| | - Peter J. Rayner
- Centre for Hyperpolarization in Magnetic Resonance , University of York , York Science Park , York , YO10 5NY , UK .
| | - Michael J. Cowley
- Centre for Hyperpolarization in Magnetic Resonance , University of York , York Science Park , York , YO10 5NY , UK .
| | - Gary G. R. Green
- Centre for Hyperpolarization in Magnetic Resonance , University of York , York Science Park , York , YO10 5NY , UK .
| | - Adrian C. Whitwood
- Centre for Hyperpolarization in Magnetic Resonance , University of York , York Science Park , York , YO10 5NY , UK .
| | - Simon B. Duckett
- Centre for Hyperpolarization in Magnetic Resonance , University of York , York Science Park , York , YO10 5NY , UK .
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25
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Ou WC, Cundari TR. DFT Modeling of the Aldehyde–Water Shift Reaction with a Cationic Cp*Ir Catalyst. ACS Catal 2014. [DOI: 10.1021/cs501222m] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- William C. Ou
- Department of Chemistry,
Center for Advanced Scientific Computing and Modeling (CASCaM), CCI
Center for Enabling New Technologies through Catalysis, University of North Texas, P.O. Box 305070, Denton, Texas 76203-5070, United States
| | - Thomas R. Cundari
- Department of Chemistry,
Center for Advanced Scientific Computing and Modeling (CASCaM), CCI
Center for Enabling New Technologies through Catalysis, University of North Texas, P.O. Box 305070, Denton, Texas 76203-5070, United States
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26
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Roselló-Merino M, Rivada-Wheelaghan O, Ortuño MA, Vidossich P, Dı́ez J, Lledós A, Conejero S. Coordinatively Unsaturated T-Shaped Platinum(II) Complexes Stabilized by Small N-Heterocyclic Carbene Ligands. Synthesis and Cyclometalation. Organometallics 2014. [DOI: 10.1021/om500416n] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Marta Roselló-Merino
- Instituto de Investigaciones
Quı́micas
(IIQ), Departamento de Quı́mica Inorgánica, CSIC and Universidad de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Orestes Rivada-Wheelaghan
- Instituto de Investigaciones
Quı́micas
(IIQ), Departamento de Quı́mica Inorgánica, CSIC and Universidad de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
| | - Manuel A. Ortuño
- Departament de Quı́mica, Universitat Autònoma de Barcelona, 08193 Cerdanyola
del Vallès, Spain
| | - Pietro Vidossich
- Departament de Quı́mica, Universitat Autònoma de Barcelona, 08193 Cerdanyola
del Vallès, Spain
| | - Josefina Dı́ez
- Departamento de Quı́mica Orgánica
e Inorgánica, Universidad de Oviedo, C/Julián Clavería
8, 33006 Oviedo, Spain
| | - Agustı́ Lledós
- Departament de Quı́mica, Universitat Autònoma de Barcelona, 08193 Cerdanyola
del Vallès, Spain
| | - Salvador Conejero
- Instituto de Investigaciones
Quı́micas
(IIQ), Departamento de Quı́mica Inorgánica, CSIC and Universidad de Sevilla, Avda. Américo Vespucio 49, 41092 Sevilla, Spain
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27
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Ye X, Yang L, Wu Z, Ren G, Lu Y, Sun T, Lei Q, Fang W, Xie H. Exploring the reaction mechanism of a cationic terminal iridium methylene complex with ethyl diazoacetate, a Lewis base and dihydrogen: a quantum chemistry study. NEW J CHEM 2014. [DOI: 10.1039/c4nj00757c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Cheng C, Kim BG, Guironnet D, Brookhart M, Guan C, Wang DY, Krogh-Jespersen K, Goldman AS. Synthesis and characterization of carbazolide-based iridium PNP pincer complexes. Mechanistic and computational investigation of alkene hydrogenation: evidence for an Ir(III)/Ir(V)/Ir(III) catalytic cycle. J Am Chem Soc 2014; 136:6672-83. [PMID: 24746026 DOI: 10.1021/ja501572g] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
New carbazolide-based iridium pincer complexes ((carb)PNP)Ir(C2H4), 3a, and ((carb)PNP)Ir(H)2, 3b, have been prepared and characterized. The dihydride, 3b, reacts with ethylene to yield the cis-dihydride ethylene complex cis-((carb)PNP)Ir(C2H4)(H)2. Under ethylene this complex reacts slowly at 70 °C to yield ethane and the ethylene complex, 3a. Kinetic analysis establishes that the reaction rate is dependent on ethylene concentration and labeling studies show reversible migratory insertion to form an ethyl hydride complex prior to formation of 3a. Exposure of cis-((carb)PNP)Ir(C2H4)(H)2 to hydrogen results in very rapid formation of ethane and dihydride, 3b. DFT analysis suggests that ethane elimination from the ethyl hydride complex is assisted by ethylene through formation of ((carb)PNP)Ir(H)(Et)(C2H4) and by H2 through formation of ((carb)PNP)Ir(H)(Et)(H2). Elimination of ethane from Ir(III) complex ((carb)PNP)Ir(H)(Et)(H2) is calculated to proceed through an Ir(V) complex ((carb)PNP)Ir(H)3(Et) which reductively eliminates ethane with a very low barrier to return to the Ir(III) dihydride, 3b. Under catalytic hydrogenation conditions (C2H4/H2), cis-((carb)PNP)Ir(C2H4)(H)2 is the catalyst resting state, and the catalysis proceeds via an Ir(III)/Ir(V)/Ir(III) cycle. This is in sharp contrast to isoelectronic (PCP)Ir systems in which hydrogenation proceeds through an Ir(III)/Ir(I)/Ir(III) cycle. The basis for this remarkable difference is discussed.
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Affiliation(s)
- Chen Cheng
- Department of Chemistry, The University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599, United States
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29
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Chepaikin E. Oxidative functionalization of alkanes under dioxygen in the presence of homogeneous noble metal catalysts. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcata.2013.11.028] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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30
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Campos J, Peloso R, Brookhart M, Carmona E. A Cationic Terminal Methylene Complex of Ir(I) Supported by a Pincer Ligand. Organometallics 2013. [DOI: 10.1021/om400383s] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Jesus Campos
- Instituto de Investigaciones Químicas-Departamento de Química
Inorgánica, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas, Avda. Américo
Vespucio 49, 41092 Sevilla, Spain
| | - Riccardo Peloso
- Instituto de Investigaciones Químicas-Departamento de Química
Inorgánica, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas, Avda. Américo
Vespucio 49, 41092 Sevilla, Spain
| | - Maurice Brookhart
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United
States
| | - Ernesto Carmona
- Instituto de Investigaciones Químicas-Departamento de Química
Inorgánica, Universidad de Sevilla-Consejo Superior de Investigaciones Científicas, Avda. Américo
Vespucio 49, 41092 Sevilla, Spain
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31
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Campos J, Espada MF, López-Serrano J, Carmona E. Cyclometalated Iridium Complexes of Bis(Aryl) Phosphine Ligands: Catalytic C–H/C–D Exchanges and C–C Coupling Reactions. Inorg Chem 2013; 52:6694-704. [DOI: 10.1021/ic400759r] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Jesús Campos
- Departamento de Química Inorgánica,
Instituto
de Investigaciones Químicas (IIQ), Universidad de Sevilla,
Consejo Superior de Investigaciones Científicas, Avda. Américo
Vespucio 49, 41092, Spain
| | - María F. Espada
- Departamento de Química Inorgánica,
Instituto
de Investigaciones Químicas (IIQ), Universidad de Sevilla,
Consejo Superior de Investigaciones Científicas, Avda. Américo
Vespucio 49, 41092, Spain
| | - Joaquín López-Serrano
- Departamento de Química Inorgánica,
Instituto
de Investigaciones Químicas (IIQ), Universidad de Sevilla,
Consejo Superior de Investigaciones Científicas, Avda. Américo
Vespucio 49, 41092, Spain
| | - Ernesto Carmona
- Departamento de Química Inorgánica,
Instituto
de Investigaciones Químicas (IIQ), Universidad de Sevilla,
Consejo Superior de Investigaciones Científicas, Avda. Américo
Vespucio 49, 41092, Spain
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