1
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Donnelly LJ, Lin JB, Gelfand BS, Chang CY, Piers WE. Ruthenium polyhydrides supported by rigid PCP pincer ligands: dynamic behaviour and reactions with CO 2. Dalton Trans 2024; 53:1862-1869. [PMID: 38179611 DOI: 10.1039/d3dt04014c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
Two rigid β-elimination immune PCcarbeneP pincer ligands, differing in their electron donor properties by variation of the substitution pattern on the aromatic linker arms, were complexed to ruthenium to form the dichlorides LRRuCl2 (R = H or NMe2). These compounds were converted to hydrido chlorides by treatment with dihydrogen (H2) and a base. By converting to tert-butoxide derivatives in situ under an atmosphere of H2, the poly hydride PCalkylP complexes LHRRu(H)3 compounds were generated. In these complexes, H2 has added across the RuC bond in the PCcarbeneP starting materials. The polyhydrides are dynamic in solution and extensive NMR studies helped to elucidate the speciation and fluxional processes operative in this dynamic system. The polyhydride complexes react rapidly with CO2 to give the PCcarbeneP formato hydride complexes LRRu(H)-κ2-O2CH. For R = H, the 1,2-hydride shift from the anchoring alkyl of the PCalkylP carbon to the metal is reversible, but for R = NMe2 it is irreversible. The CO2 incorporated into the formato ligand of these compounds exchanges with free CO2via a bimolecular mechanism that is more rapid for R = NMe2 than for R = H; plausible explanations for this observation are proffered. Experiments designed to evaluate the efficacy of the R = NMe2 formato hydride complex as a catalyst precursor for CO2 hydrogenation to formate salts reveal poor performance in comparison to state-of-the-art ruthenium-based catalysts. This is due primarily to the precipitation of a dimeric μ-κ2-κ1-CO3 carbonate complex that is not an active catalyst for the reaction.
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Affiliation(s)
- Laurie J Donnelly
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada.
| | - Jian-Bin Lin
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada.
| | - Benjamin S Gelfand
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada.
| | - Chia Yun Chang
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada.
| | - Warren E Piers
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada.
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2
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Ding Y, Wu J, Huang H. Carbonylative Formal Cycloaddition between Alkylarenes and Aldimines Enabled by Palladium-Catalyzed Double C-H Bond Activation. J Am Chem Soc 2023; 145:4982-4988. [PMID: 36821463 DOI: 10.1021/jacs.3c00004] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
Double C-H bond activation can enable an expeditious reaction pathway to cyclic compounds, offering an efficient tool to synthesize valuable molecules. However, cyclization reaction enabled by double C-H bond activation at one carbon atom is nearly unknown. Herein, we report a carbonylative formal cycloaddition of alkylarenes with imines via double benzylic C-H bond activation at one carbon atom, allowing a straightforward synthesis of β-lactams from readily accessible alkylarenes and imines, which paves the way for developing an annulation reaction through double C-H bond activation at one carbon atom.
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Affiliation(s)
- Yongzheng Ding
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Jianing Wu
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, Hefei, 230026, P. R. China
| | - Hanmin Huang
- Hefei National Research Center for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, Hefei, 230026, P. R. China.,Key Laboratory of Green and Precise Synthetic Chemistry and Applications, Ministry of Education, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China
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3
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Watson LJ, Hill AF. C-H activation in bimetallic rhodium complexes to afford N-heterocyclic carbene pincer complexes. Dalton Trans 2023; 52:2164-2174. [PMID: 36723105 DOI: 10.1039/d2dt03984b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The pro-ligands 1,8-bis(di-R-phosphinomethyl)-2,3-dihydroperimidine (RH2Pm, R = phenyl, cyclohexyl) react with [RhCl(CE)(PPh3)2] (E = O, S) to afford the bimetallic complexes [RhCl(CE)(μ-RH2Pm)]2 (E = O, S). Upon heating, these species undergo double C-H activation to afford the N-heterocyclic carbene (NHC) pincer complexes [RhCl(RPm)]. Reduction of [RhCl(CO)(μ-PhH2Pm)]2 with KC8 results in the bimetallic rhodium(0) complex, [Rh(μ-CO)(PhH2Pm)]2, with a formal Rh-Rh bond and a hydrogen-bonding interaction between rhodium and the central methylene group (C-H⋯Rh = 2.802 Å). Upon treatment with tritylium, ferrocenium or triphenylcyclopropenium tetrafluoroborates this species undergoes double C-H activation to afford a mononuclear NHC pincer complex salt, [Rh(CO)(PhPm)]BF4. Treatment of [RhCl(CO)(PhH2Pm)]2 with lithium (trimethylsilyl)acetylide provides another bimetallic species, [Rh(CCSiMe3)(CO)(PhH2Pm)]2, however heating this species does not proceed cleanly to the monomeric NHC complex, [Rh(CCSiMe3)(CO)(PhPm)] which may however be obtained from [RhCl(RPm)] and LiCCSiMe3.
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Affiliation(s)
- Lachlan J Watson
- Research School of Chemistry, The Australian National University, Canberra, ACT 0200, Australia.
| | - Anthony F Hill
- Research School of Chemistry, The Australian National University, Canberra, ACT 0200, Australia.
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4
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He F, Gourlaouen C, Pang H, Braunstein P. Experimental and Theoretical Study of Ni
II
‐ and Pd
II
‐Promoted Double Geminal C(sp
3
)−H Bond Activation Providing Facile Access to NHC Pincer Complexes: Isolated Intermediates and Mechanism. Chemistry 2022; 28:e202200507. [PMID: 35543286 PMCID: PMC9401054 DOI: 10.1002/chem.202200507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Indexed: 11/11/2022]
Abstract
We report the first examples of metal‐promoted double geminal activation of C(sp3)−H bonds of the N−CH2−N moiety in an imidazole‐type heterocycle, leading to nickel and palladium N‐heterocyclic carbene complexes under mild conditions. Reaction of the new electron‐rich diphosphine 1,3‐bis((di‐tert‐butylphosphaneyl)methyl)‐2,3‐dihydro‐1H‐benzo[d]imidazole (1) with [PdCl2(cod)] occurred in a stepwise fashion, first by single C−H bond activation yielding the alkyl pincer complex [PdCl(PCsp3HP)] (3) with two trans phosphane donors and a covalent Pd−Csp3
bond. Activation of the C−H bond of the resulting α‐methine Csp3
H−M group occurred subsequently when 3 was treated with HCl to yield the NHC pincer complex [PdCl(PCNHCP)]Cl (2). Treatment of 1 with [NiBr2(dme)] also afforded a NHC pincer complex, [NiBr(PCNHCP)]Br (6), but the reactions leading to the double geminal C−H bond activation of the N−CH2−N group were too fast to allow identification or isolation of an intermediate analogous to 3. The determination of six crystal structures, the isolation of reaction intermediates and DFT calculations provided the basis for suggesting the mechanism of the stepwise transformation of a N−CH2−N moiety in the N−CNHC−N unit of NHC pincer complexes and explain the key differences observed between the Pd and Ni chemistries.
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Affiliation(s)
- Fengkai He
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225009 Jiangsu P. R. China) E-mail: s
- Laboratoire de Chimie de Coordination Institut de Chimie (UMR 7177 CNRS) Université de Strasbourg 4 rue Blaise Pascal 67081 Strasbourg France
| | - Christophe Gourlaouen
- Laboratoire de Chimie Quantique Institut de Chimie (UMR 7177 CNRS) Université de Strasbourg 4 rue Blaise Pascal 67081 Strasbourg France
| | - Huan Pang
- School of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225009 Jiangsu P. R. China) E-mail: s
| | - Pierre Braunstein
- Laboratoire de Chimie de Coordination Institut de Chimie (UMR 7177 CNRS) Université de Strasbourg 4 rue Blaise Pascal 67081 Strasbourg France
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5
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Zhu J, Xue Y, Zhang R, Ratchford BL, Dong G. Catalytic Activation of Unstrained C(Aryl)-C(Alkyl) Bonds in 2,2'-Methylenediphenols. J Am Chem Soc 2022; 144:3242-3249. [PMID: 35138096 PMCID: PMC9115852 DOI: 10.1021/jacs.1c13342] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Catalytic activation of unstrained and nonpolar C-C bonds remains a largely unmet challenge. Here, we describe our detailed efforts in developing a rhodium-catalyzed hydrogenolysis of unstrained C(aryl)-C(alkyl) bonds in 2,2'-methylenediphenols aided by removable directing groups. Good yields of the monophenol products are obtained with tolerating a wide range of functional groups. In addition, the reaction is scalable, and the catalyst loading can be reduced to as low as 0.5 mol %. Moreover, this method proves to be effective to cleave C(aryl)-C(alkyl) linkages in both models of phenolic resins and commercial novolacs resins. Finally, detailed experimental and computational mechanistic studies show that with C-H activation being a competitive but reversible off-cycle reaction, this transformation goes through a directed C(aryl)-C(alkyl) oxidative addition pathway.
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Affiliation(s)
- Jun Zhu
- Department of chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Yibin Xue
- Department of chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Rui Zhang
- Department of chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Benjamin L. Ratchford
- Department of chemistry, University of Chicago, Chicago, Illinois 60637, United States
| | - Guangbin Dong
- Department of chemistry, University of Chicago, Chicago, Illinois 60637, United States
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6
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Clapson ML, Kirkland JK, Piers WE, Ess DH, Gelfand B, Lin JB. Carbene Character in a Series of Neutral PCcarbeneP Cobalt(I) Complexes: Radical Carbenes versus Nucleophilic Carbenes. Organometallics 2022. [DOI: 10.1021/acs.organomet.1c00585] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marissa L. Clapson
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, T2N 1N4 Canada
| | - Justin K. Kirkland
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Warren E. Piers
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, T2N 1N4 Canada
| | - Daniel H. Ess
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
| | - Benjamin Gelfand
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, T2N 1N4 Canada
| | - Jian-Bin Lin
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, T2N 1N4 Canada
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7
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8
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Karimzadeh‐Younjali M, Wendt OF. α‐ and β‐Eliminations in Transition Metal Complexes: Strategies to Cleave Unstrained C−C and C−F Bonds. Helv Chim Acta 2021. [DOI: 10.1002/hlca.202100114] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Ola F. Wendt
- Centre for Analysis and Synthesis Department of Chemistry Lund University PO Box 124 SE-22100 Lund Sweden
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9
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Wang Q, Manzano RA, Tinnermann H, Sung S, Leforestier B, Krämer T, Young RD. Access to and Reactivity of Fe
0
, Fe
−I
, Fe
I
, and Fe
II
PC
carbene
P Pincer Complexes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Qingyang Wang
- Department of Chemistry National University of Singapore Singapore
| | | | | | - Simon Sung
- Department of Chemistry National University of Singapore Singapore
| | - Baptiste Leforestier
- Department of Chemistry University of Warwick UK
- Department of Chemistry Maynooth University Ireland
| | | | - Rowan D. Young
- Department of Chemistry National University of Singapore Singapore
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10
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Wiedmaier NR, Schubert H, Mayer HA, Wesemann L. Carbocyclic pincer carbene complexes of ruthenium: syntheses and reversible hydrogenation. Dalton Trans 2021; 50:11814-11820. [PMID: 34369545 DOI: 10.1039/d1dt02266k] [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
The ruthenium carbene pincer complex 2 was synthesized treating the benzo annulated cycloheptatriene bisphosphine 1 with RuCl3. Addition of three equivalents of hydrogen to the carbocyclic carbene complex 2 was achieved in reaction of 2 with hydrogen at elevated temperatures. Hydrogenated complex 4, exhibiting a rigid chair conformation in solution, was dehydrogenated by heating a toluene solution of complex 4 to reflux for 5-7 d. In reaction with ethylene, complex 4 transfers one equivalent of hydrogen, forming ethane and alkyl complex 5.
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Affiliation(s)
- Nicholas R Wiedmaier
- Institut für Anorganische Chemie, Universität Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany.
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11
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Wang Q, Manzano RA, Tinnermann H, Sung S, Leforestier B, Krämer T, Young RD. Access to and Reactivity of Fe 0 , Fe -I , Fe I , and Fe II PC carbene P Pincer Complexes. Angew Chem Int Ed Engl 2021; 60:18168-18177. [PMID: 34145715 DOI: 10.1002/anie.202104130] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 06/17/2021] [Indexed: 12/11/2022]
Abstract
Despite their promising metal-ligand cooperative reactivity, PCcarbene P pincer ligands are rarely reported for first-row transition-metal centres. Using a dehydration methodology, we report access to an Fe0 PCcarbene P pincer complex (1) that proceeds via an isolated α-hydroxylalkyl hydrido complex (3). Reversible carbonyl migration to the carbene position in 1 is found to allow coordination chemistry and E-H bond addition (E=H, B, Cl) across the iron-carbene linkage, representing a unique mechanism for metal-ligand cooperativity. The PCcarbene P pincer ligand is also found to stabilize formal FeII , FeI , and Fe-I oxidation states, as demonstrated with synthesis and characterization of the complexes [11-X][BArF 20 ] (X=Br, I), 12, and K[13]. Compound K[13] is found to be highly reactive, and abstracts hydrogen from a range of aliphatic C-H sources. Computational analysis by DFT suggests that the formal FeI and Fe-I complexes contain significant carbene radical character. The ability of the PCcarbene P ligand scaffold to partake in metal-ligand cooperativity and to support a range of iron oxidation states renders it as potentially useful in many catalytic applications.
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Affiliation(s)
- Qingyang Wang
- Department of Chemistry, National University of Singapore, Singapore
| | - Richard A Manzano
- Department of Chemistry, National University of Singapore, Singapore
| | | | - Simon Sung
- Department of Chemistry, National University of Singapore, Singapore
| | - Baptiste Leforestier
- Department of Chemistry, University of Warwick, UK.,Department of Chemistry, Maynooth University, Ireland
| | - Tobias Krämer
- Department of Chemistry, Maynooth University, Ireland
| | - Rowan D Young
- Department of Chemistry, National University of Singapore, Singapore
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12
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Khristolyubov DO, Lyubov DM, Shavyrin AS, Cherkasov AV, Fukin GK, Trifonov AA. Ln( ii) and Ca( ii) NC sp3N pincer type diarylmethanido complexes – promising catalysts for C–C and C–E (E = Si, P, N, S) bond formation. Inorg Chem Front 2020. [DOI: 10.1039/d0qi00369g] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The first examples of Ln(ii) (Ln = Yb, Sm) and Ca [NCsp3N] pincer type diarylmethanido complexes were synthesized and successfully used as efficient and selective precatalyst for intermolecular C–C and C–E bond formation.
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Affiliation(s)
| | - Dmitry M. Lyubov
- Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- Russia
| | - Andrey S. Shavyrin
- Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- Russia
| | - Anton V. Cherkasov
- Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- Russia
| | - Georgy K. Fukin
- Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- Russia
| | - Alexander A. Trifonov
- Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- Russia
- Institute of Organoelement Compounds of Russian Academy of Sciences
- Moscow
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13
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Recent advances in the chemistry of group 9—Pincer organometallics. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2020. [DOI: 10.1016/bs.adomc.2019.09.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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14
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Barnett HJ, Hill AF. Halogenation of A-frame μ-carbido complexes: a diamagnetic rhodium(ii) carbido complex. Chem Commun (Camb) 2020; 56:7738-7740. [DOI: 10.1039/d0cc02349c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Chlorination of the new μ-carbido [Rh2(μ-C)Cl2(μ-dppf)2] (dppf = 1,1′-bis(diphenylphosphino)ferrocene) affords the dirhodium(ii) complex [Rh2(μ-C)Cl4(μ-dppf)2] the carbido bridge of which can only be adequately described by delocalised bonding.
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Affiliation(s)
| | - Anthony F. Hill
- Research School of Chemistry
- Australian National University
- Canberra
- Australia
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15
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Zhou C, Munkerup K, Wang Y, Das PK, Chakraborty P, Hu J, Yao C, Huang MH, Huang KW. Ligand-centered reactivity of a pseudo-dearomatized phosphorus-nitrogen PN 3P* rhodium complex towards molecular oxygen at room temperature. Inorg Chem Front 2020. [DOI: 10.1039/c9qi01605h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The pseudo-dearomatized ligand of PN3P*Rh-CO reacts with O2 to form an α, β-unsaturated carbonyl moiety at room temperature, showcasing an unprecedented ligand-centered reactivity with the oxidation state of Rh(I) remaining untouched.
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Affiliation(s)
- Chunhui Zhou
- KAUST Catalysis Center & Division of Physical Science and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23900-6900
- Saudi Arabia
| | - Kristin Munkerup
- KAUST Catalysis Center & Division of Physical Science and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23900-6900
- Saudi Arabia
| | - Yuan Wang
- KAUST Catalysis Center & Division of Physical Science and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23900-6900
- Saudi Arabia
| | - Pradip K. Das
- KAUST Catalysis Center & Division of Physical Science and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23900-6900
- Saudi Arabia
| | - Priyanka Chakraborty
- KAUST Catalysis Center & Division of Physical Science and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23900-6900
- Saudi Arabia
| | - Jinsong Hu
- KAUST Catalysis Center & Division of Physical Science and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23900-6900
- Saudi Arabia
| | - Changguang Yao
- KAUST Catalysis Center & Division of Physical Science and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23900-6900
- Saudi Arabia
| | - Mei-Hui Huang
- KAUST Catalysis Center & Division of Physical Science and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23900-6900
- Saudi Arabia
| | - Kuo-Wei Huang
- KAUST Catalysis Center & Division of Physical Science and Engineering
- King Abdullah University of Science and Technology
- Thuwal 23900-6900
- Saudi Arabia
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16
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Affiliation(s)
- Anthony P. Deziel
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Melissa R. Hoffbauer
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Vlad M. Iluc
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
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17
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Sung S, Tinnermann H, Krämer T, Young RD. Direct oxide transfer from an η2-keto ligand to generate a cobalt PCcarbeneP(O) pincer complex. Dalton Trans 2019; 48:9920-9924. [DOI: 10.1039/c9dt02313e] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We report the direct carbonyl cleavage in a κ3-P′,(η2-C,O),P′′ ligand by a monomeric cobalt centre through metal–ligand cooperativity.
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Affiliation(s)
- Simon Sung
- Department of Chemistry
- National University of Singapore
- Singapore 117543
- Singapore
| | - Hendrik Tinnermann
- Department of Chemistry
- National University of Singapore
- Singapore 117543
- Singapore
| | - Tobias Krämer
- Department of Chemistry
- Maynooth University
- Maynooth
- Ireland
| | - Rowan D. Young
- Department of Chemistry
- National University of Singapore
- Singapore 117543
- Singapore
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18
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Rej S, Chatani N. Rhodium(i)-catalyzed mono-selective C–H alkylation of benzenesulfonamides with terminal alkenes. Chem Commun (Camb) 2019; 55:10503-10506. [DOI: 10.1039/c9cc05219d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first example of C–H alkylation of benzenesulfonamides with alkenes is reported. Deuterium labeling experiments indicate that an unusual 1,2-H shift mechanism to generate a carbene rhodium intermediate is involved.
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Affiliation(s)
- Supriya Rej
- Department of Applied Chemistry
- Faculty of Engineering
- Osaka University
- Suita
- Japan
| | - Naoto Chatani
- Department of Applied Chemistry
- Faculty of Engineering
- Osaka University
- Suita
- Japan
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19
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Subramaniyan V, Dutta B, Govindaraj A, Mani G. Facile synthesis of Pd(ii) and Ni(ii) pincer carbene complexes by the double C–H bond activation of a new hexahydropyrimidine-based bis(phosphine): catalysis of C–N couplings. Dalton Trans 2019; 48:7203-7210. [DOI: 10.1039/c8dt03413c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new hexahydropyrimidine-based NHC proligand undergoes facile double C–H bond activation to give Pd(ii) and Ni(ii) NHC pincer cationic complexes. The Pd complex catalyzes C–N cross couplings very efficiently.
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Affiliation(s)
| | - Bidisa Dutta
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur
- India 721 302
| | - Anbarasu Govindaraj
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur
- India 721 302
| | - Ganesan Mani
- Department of Chemistry
- Indian Institute of Technology Kharagpur
- Kharagpur
- India 721 302
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20
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Smith JD, Chih E, Piers WE, Spasyuk DM. Tuning iridium (I) PCcarbeneP frameworks for facile cooperative N2O reduction. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.08.054] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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21
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He Q, Chatani N. A Synthesis of 3,4-Dihydroisoquinolin-1(2H)-one via the Rhodium-Catalyzed Alkylation of Aromatic Amides with N-Vinylphthalimide. J Org Chem 2018; 83:13587-13594. [DOI: 10.1021/acs.joc.8b02249] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Qiyuan He
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
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22
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Sung S, Wang Q, Krämer T, Young RD. Synthesis and reactivity of a PC carbeneP cobalt(i) complex: the missing link in the cobalt PXP pincer series (X = B, C, N). Chem Sci 2018; 9:8234-8241. [PMID: 30542572 PMCID: PMC6240806 DOI: 10.1039/c8sc02782j] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 09/05/2018] [Indexed: 02/05/2023] Open
Abstract
We report the first example of a cobalt PCcarbeneP pincer complex (1) featuring a central alkylidene carbon donor accessed through the dehydration of an alcoholic POP proligand.
We report the first example of a cobalt PCcarbeneP pincer complex (1) featuring a central alkylidene carbon donor accessed through the dehydration of an alcoholic POP proligand. Complex 1 shares bonding similarities with cobalt PBP and PNP pincer complexes where the donor atom engages in π-bonding with the cobalt centre, and thus completes the PXP (X = B, C, N) pincer ligand series for cobalt (for X donors that partake in M–L π-bonding). As compared to PBP and PNP pincer complexes, which are known to be good hydride and proton acceptors (respectively), complex 1 is found to be an effective hydrogen atom acceptor. Complex 1 partakes in cooperative ligand reactivity, engaging in several small molecule activations with styrene, bromine, carbon disulphide, phenyl acetylene, acetonitrile, hydrogen, benzaldehyde and water (through microreversibility). The mechanism for the formation of complex 1 is studied through the isolation and computational analysis of key intermediates. The formation of 1 is found to avoid C–H activation of the proligand, and instead proceeds through a combination of O–H activation, hydrogen atom transfer, β-hydride elimination and hydrogen activation processes.
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Affiliation(s)
- Simon Sung
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , Singapore 117543 .
| | - Qingyang Wang
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , Singapore 117543 .
| | - Tobias Krämer
- Department of Chemistry , Maynooth University , Maynooth , Ireland
| | - Rowan D Young
- Department of Chemistry , National University of Singapore , 3 Science Drive 3 , Singapore 117543 .
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23
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Jiang W, Chu J, Yang J, Zang P, Gao L, Zhou G, Zhou H, Wei H. The influence of different monodentate P-ligand mixtures on Rh-catalyzed 1-butene hydroformylation. Chin J Chem Eng 2018. [DOI: 10.1016/j.cjche.2018.05.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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24
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25
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Hoffbauer MR, Comanescu CC, Dymm BJ, Iluc VM. Influence of the Leaving Group on C–H Activation Pathways in Palladium Pincer Complexes. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00237] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Melissa R. Hoffbauer
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Cezar C. Comanescu
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Brittany J. Dymm
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
| | - Vlad M. Iluc
- Department of Chemistry and Biochemistry, University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, United States
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26
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Khristolyubov DO, Lyubov DM, Cherkasov AV, Fukin GK, Shavyrin AS, Trifonov AA. Alkali-Metal Alkyl Complexes with the Tridentate Benzhydryl Ligand [2,2′-(4-MeC6H4NMe2)2CH]−. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00182] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dmitry O. Khristolyubov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina str. 49, GSP-445, 630950 Nizhny Novgorod, Russia
| | - Dmitry M. Lyubov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina str. 49, GSP-445, 630950 Nizhny Novgorod, Russia
| | - Anton V. Cherkasov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina str. 49, GSP-445, 630950 Nizhny Novgorod, Russia
| | - Georgy K. Fukin
- Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina str. 49, GSP-445, 630950 Nizhny Novgorod, Russia
| | - Andrey S. Shavyrin
- Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina str. 49, GSP-445, 630950 Nizhny Novgorod, Russia
| | - Alexander A. Trifonov
- Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina str. 49, GSP-445, 630950 Nizhny Novgorod, Russia
- Institute of Organoelement Compounds of Russian Academy of Sciences, Vavilova str. 28, 119334 Moscow, Russia
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27
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28
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Chatani N. The Use of a Rhodium Catalyst/8-Aminoquinoline Directing Group in the C-H Alkylation of Aromatic Amides with Alkenes: Possible Generation of a Carbene Intermediate from an Alkene. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20170316] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka 565-0871
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29
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Shibata K, Natsui S, Tobisu M, Fukumoto Y, Chatani N. An unusual endo-selective C-H hydroarylationof norbornene by the Rh(I)-catalyzed reactionof benzamides. Nat Commun 2017; 8:1448. [PMID: 29129930 PMCID: PMC5682280 DOI: 10.1038/s41467-017-01531-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Accepted: 09/20/2017] [Indexed: 11/09/2022] Open
Abstract
Hydroarylation is an environmentally attractive strategy which incorporates all of the atoms contained in the substrates into the desired products. Almost all the hydroarylations of norbornene reported to date involve an exo-selective reaction. Here we show the endo-selective hydroarylation of norbornene in the Rh(I)-catalyzed reaction of aromatic amides. The addition of sterically bulky carboxylic acids enhances the endo-selectivity of the reaction. The results of deuterium-labeling experiments show that both the ortho-carbon and the ortho-hydrogen atoms of aromatic amides were attached to the same carbon atom of the norbornane skeleton in the hydroarylation product. These results clearly suggest that hydrometalation or carbometalation, which are commonly accepted mechanisms for the catalytic hydroarylation of C–H bonds, are not involved as the key step in the present reaction, and suggest that the reaction involves a rhodium carbene complex generated from norbornene as the key intermediate. Investigating unusual organometallic pathways may help to efficiently control product selectivity in homogeneous catalysis. Here, the authors report the hydroarylation of aromatic amides with norbornene derivatives and propose the formation of a rhodium-carbene intermediate leading to rarely observed endo-products.
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Affiliation(s)
- Kaname Shibata
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Satoko Natsui
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Mamoru Tobisu
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Yoshiya Fukumoto
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan
| | - Naoto Chatani
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita, Osaka, 565-0871, Japan.
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30
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Puerta Lombardi BM, Brown RM, Gendy C, Chang CY, Chivers T, Roesler R. Nickel and Platinum PCP Pincer Complexes Incorporating an Acyclic Diaminoalkyl Central Moiety Connecting Imidazole or Pyrazole Rings. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00396] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Braulio M. Puerta Lombardi
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Rudy M. Brown
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Chris Gendy
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Chia Yun Chang
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Tristram Chivers
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Roland Roesler
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
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31
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Sung S, Joachim T, Krämer T, Young RD. Protonolysis of an α-Hydroxyl Ligand for the Generation of a PCcarbeneP Pincer Complex and Subsequent Reactivity Studies. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00461] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Simon Sung
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Timothy Joachim
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
| | - Tobias Krämer
- Institute
of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Rowan D. Young
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543
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32
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Sung S, Boon JK, Lee JJC, Rajabi NA, Macgregor SA, Krämer T, Young RD. Convergent (De)Hydrogenative Pathways via a Rhodium α-Hydroxylalkyl Complex. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00158] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Simon Sung
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - Jie Kang Boon
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - Johnathan J. C. Lee
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
| | - Nasir A. Rajabi
- Institute
of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Stuart A. Macgregor
- Institute
of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Tobias Krämer
- Institute
of Chemical Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom
| | - Rowan D. Young
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, 117543 Singapore
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33
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Doyle LE, Piers WE, Bi DW. Cationic PCP iridaepoxide and carbene complexes for facile water elimination and activation processes. Dalton Trans 2017; 46:4346-4354. [DOI: 10.1039/c7dt00563f] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pathways for water activation and elimination at cationic iridium PCP pincer compounds are explored.
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Affiliation(s)
| | | | - David W. Bi
- Department of Chemistry
- University of Calgary
- Calgary
- Canada
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34
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Sung S, Young RD. Facile generation of iridium PCcarbeneP pincer complexes via water elimination from an alcohol proligand. Dalton Trans 2017; 46:15407-15414. [DOI: 10.1039/c7dt03690f] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
We report the facile generation of Ir PCcarbeneP pincer systems.
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Affiliation(s)
- Simon Sung
- Department of Chemistry
- National University of Singapore
- Singapore 117543
| | - Rowan D. Young
- Department of Chemistry
- National University of Singapore
- Singapore 117543
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35
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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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