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Ohashi M, Ando K, Murakami S, Michigami K, Ogoshi S. N-Heterocyclic Carbenes with Polyfluorinated Groups at the 4- and 5-Positions from [3 + 2] Cycloadditions between Formamidinates and cis-1,2-Difluoroalkene Derivatives. J Am Chem Soc 2023; 145:23098-23108. [PMID: 37749910 DOI: 10.1021/jacs.3c06331] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/27/2023]
Abstract
We herein report the formation of fluorinated N-heterocyclic carbenes (NHCFs) that bear fluorine atoms at the 4- and 5-positions of the imidazol-2-ylidene ring. Treatment of sodium N,N'-bis(aryl)formamidinates with tetrafluoroethylene followed by the addition of LiBF4 induced a [3 + 2] cycloaddition to afford 4,5-difluorinated imidazolium salts, which served as the precursors for 4,5-difluorinated NHCs. A key feature of this procedure is its applicability to other perfluorinated compounds, which enabled us to incorporate polyfluorinated functional groups at 4- and 5-positions on the imidazol-2-ylidene skeleton. Thus, employing octafluorocyclopentene and hexafluorobenzene led to the formation of 4,4,5,5,6,6-hexafluoro-1,3-diaryl-3,4,5,6-tetrahydrocyclopenta[d]imidazolium (CypIPrF·HBF4) and 4,5,6,7-tetrafluoro-1,3-diarylbenzimidazolium (BIPrF·HBF4) salts, respectively. A thorough NMR analysis of these NHCFs, their selenium adducts, and their tricarbonyl nickel complexes, (NHCF)Ni(CO)3, demonstrated that the fluorine substituents, contrary to expectations, tend to act as electron donors owing to the considerable positive mesomeric effect, while the perfluorocyclopentene-fused and tetrafluorobenzo-fused rings are pure electron acceptors due to their strong negative inductive effect. The unique and increased π-accepting character of the perfluorocyclopentene-fused and tetrafluorobenzo-fused NHCFs in both stoichiometric and catalytic reactions is further demonstrated by employing (NHCF)Ni(CO)3 and (NHCF)AuCl species, respectively. Moreover, an analysis of the % buried volume (%Vbur) values clearly suggests that the modification of the NHC backbone with polyfluorinated groups can drastically alter the electronic properties of the NHC ligand without substantially changing its steric properties. Our experimental results were further corroborated by a series of computational calculations.
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Affiliation(s)
- Masato Ohashi
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sakai 599-8531 Osaka, Japan
| | - Kota Ando
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita 565-0871 Osaka, Japan
| | - Shoichi Murakami
- Department of Chemistry, Faculty of Science, Osaka Prefecture University, Sakai 599-8531 Osaka, Japan
| | - Kenichi Michigami
- Department of Chemistry, Graduate School of Science, Osaka Metropolitan University, Sakai 599-8531 Osaka, Japan
| | - Sensuke Ogoshi
- Department of Applied Chemistry, Faculty of Engineering, Osaka University, Suita 565-0871 Osaka, Japan
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2
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Nazarov IV, Khrychikova AP, Medentseva EI, Bermesheva EV, Borisov IL, Yushkin AA, Volkov AV, Wozniak AI, Petukhov DI, Topchiy MA, Asachenko AF, Ren XK, Bermeshev MV. CO2-selective vinyl-addition polymers from nadimides: Synthesis and performance for membrane gas separation. J Memb Sci 2023. [DOI: 10.1016/j.memsci.2023.121624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
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3
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Petersen HA, Alherz AW, Stinson TA, Huntzinger CG, Musgrave CB, Luca OR. Predictive Energetic Tuning of C-Nucleophiles for the Electrochemical Capture of Carbon Dioxide. iScience 2022; 25:103997. [PMID: 35310940 PMCID: PMC8927916 DOI: 10.1016/j.isci.2022.103997] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 12/28/2021] [Accepted: 02/23/2022] [Indexed: 11/29/2022] Open
Abstract
This work maps the thermodynamics of electrochemically generated C-nucleophiles for reactive capture of CO2. We identify a linear relationship between the pKa, the reduction potential of a protonated nucleophile (Ered), and the nucleophile’s free energy of CO2 binding (ΔGbind). Through synergistic experiments and computations, this study establishes a three-parameter correlation described by the equation ΔGbind=−0.78pKa+4.28Ered+20.95 for a series of twelve imidazol(in)ium/N-heterocyclic carbene pairs with an R2 of 0.92. The correlation allows us to predict the ΔGbind of C-nucleophiles to CO2 using reduction potentials or pKas of imidazol(in)ium cations. The carbenes in this study were found to exhibit a wide range CO2 binding strengths, from strongly CO2 binding to nonspontaneous. This observation suggests that the ΔGbind of imidazol(in)ium-based carbenes is tunable to a desired strength by appropriate structural changes. This work sets the stage for systematic energetic tuning of electrochemically enabled reactive separations. CO2 binding energy was calculated for a set of N-heterocyclic carbenes (NHCs) CO2 binding energy of NHCs is widely synthetically tunable pKa, reduction potential, and CO2 binding energy correlate linearly for NHCs 3D correlation enables easy prediction of CO2 binding strength for novel NHCs
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Affiliation(s)
- Haley A. Petersen
- Department of Chemistry and Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Abdulaziz W. Alherz
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, United States
| | - Taylor A. Stinson
- Department of Chemistry and Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Chloe G. Huntzinger
- Department of Chemistry and Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, CO 80309, USA
| | - Charles B. Musgrave
- Department of Chemistry and Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, CO 80309, USA
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, United States
- Materials Science and Engineering Program, University of Colorado, Boulder, CO 80309, United States
- Corresponding author
| | - Oana R. Luca
- Department of Chemistry and Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, CO 80309, USA
- Corresponding author
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4
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Barnett C, Harper JB, Cole ML. Correlating Electronic Properties of
N
‐Heterocyclic Carbenes with Structure, and the Implications of Using Different Probes. ChemistrySelect 2022. [DOI: 10.1002/slct.202104348] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Christopher Barnett
- School of Chemistry University of New South Wales, UNSW Sydney NSW 2052 Australia
- Current address: School of Chemistry The University of Sydney Sydney NSW 2006 Australia
| | - Jason B. Harper
- School of Chemistry University of New South Wales, UNSW Sydney NSW 2052 Australia
| | - Marcus L. Cole
- School of Chemistry University of New South Wales, UNSW Sydney NSW 2052 Australia
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5
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Twycross D, Davey CJ, Cole ML, McKay AI. Stereoelectronic Characterization and Catalytic Potential of a 1,3‐Bis(2,6‐terphenyl)‐Substituted N‐Heterocyclic Carbene. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Daniel Twycross
- School of Chemistry University of New South Wales Kensington NSW, 2052 Australia
| | - Christopher J. Davey
- School of Chemistry University of New South Wales Kensington NSW, 2052 Australia
| | - Marcus L. Cole
- School of Chemistry University of New South Wales Kensington NSW, 2052 Australia
| | - Alasdair I. McKay
- School of Chemistry University of New South Wales Kensington NSW, 2052 Australia
- School of Chemistry Monash University Clayton VIC 3080 Australia
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6
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The catalytic activity of new iridium(I) N-heterocyclic carbene complexes for hydrogen transfer reaction of ketones. MONATSHEFTE FUR CHEMIE 2021. [DOI: 10.1007/s00706-021-02734-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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7
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Quinlivan PJ, Loo A, Shlian DG, Martinez J, Parkin G. N-Heterocyclic Carbene Complexes of Nickel, Palladium, and Iridium Derived from Nitron: Synthesis, Structures, and Catalytic Properties. Organometallics 2021. [DOI: 10.1021/acs.organomet.0c00679] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Patrick J. Quinlivan
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Aaron Loo
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Daniel G. Shlian
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Joan Martinez
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Gerard Parkin
- Department of Chemistry, Columbia University, New York, New York 10027, United States
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8
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New expanded-ring NHC platinum(0) complexes: Synthesis, structure and highly efficient diboration of terminal alkenes. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121140] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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9
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Bermesheva EV, Wozniak AI, Andreyanov FA, Karpov GO, Nechaev MS, Asachenko AF, Topchiy MA, Melnikova EK, Nelyubina YV, Gribanov PS, Bermeshev MV. Polymerization of 5-Alkylidene-2-norbornenes with Highly Active Pd–N-Heterocyclic Carbene Complex Catalysts: Catalyst Structure–Activity Relationships. ACS Catal 2019. [DOI: 10.1021/acscatal.9b04686] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Evgeniya V. Bermesheva
- A. V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninsky pr., 119991 Moscow, Russia
- I. M. Sechenov First Moscow State Medical University, Trubetskaya str., 8, building 2, 119991 Moscow, Russia
| | - Alyona I. Wozniak
- A. V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninsky pr., 119991 Moscow, Russia
| | - Fedor A. Andreyanov
- A. V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninsky pr., 119991 Moscow, Russia
| | - Gleb O. Karpov
- A. V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninsky pr., 119991 Moscow, Russia
| | - Mikhail S. Nechaev
- A. V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninsky pr., 119991 Moscow, Russia
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskiye gory, Moscow 119991, Russia
| | - Andrey F. Asachenko
- A. V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninsky pr., 119991 Moscow, Russia
| | - Maxim A. Topchiy
- A. V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninsky pr., 119991 Moscow, Russia
| | - Elizaveta K. Melnikova
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskiye gory, Moscow 119991, Russia
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, Moscow 119991, Russia
| | - Yulia V. Nelyubina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, Moscow 119991, Russia
| | - Pavel S. Gribanov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, Moscow 119991, Russia
| | - Maxim V. Bermeshev
- A. V. Topchiev Institute of Petrochemical Synthesis, RAS, 29 Leninsky pr., 119991 Moscow, Russia
- D. I. Mendeleyev University of Chemical Technology of Russia, 9 Miusskaya sq., 125047 Moscow, Russia
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10
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Kieser JM, Kinney ZJ, Gaffen JR, Evariste S, Harrison AM, Rheingold AL, Protasiewicz JD. Three Ways Isolable Carbenes Can Modulate Emission of NH-Containing Fluorophores. J Am Chem Soc 2019; 141:12055-12063. [PMID: 31322901 DOI: 10.1021/jacs.9b04864] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Fluorescent molecules and materials that exhibit emission changes in response to analytes are of great interest across multiple disciplines. Herein, we investigate the response of NH-containing fluorophores carbazole and 2-phenylbenzimidazole (Ph-BIM) with two representative isolable singlet carbenes. Specifically, N-heterocyclic carbene 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene (IPr) and cyclic (alkyl)(amino)carbene (2,6-diisopropylphenyl)-4,4-diethyl-2,2-dimethyl-pyrrolidin-5-ylidene (EtCAAC) were discovered to afford three different types of reaction products with carbazole and Ph-BIM. Depending on the reaction pair, hydrogen bonding (1), NH-insertion (2,3), or proton transfer (4) products can be isolated, each displaying variable photophysical responses. These products have been structurally authenticated by single crystal X-ray diffraction and NMR spectrometric methods. Studies of the solution state behavior of 1-4 reveals that these adducts are labile and can reversibly dissociate to free carbenes and fluorophores to varying extents. These equilibria produce concentration dependent solution state behavior as identified and quantified via UV-visible absorption, emission, 1H DOSY, and NMR spectroscopic measurements.
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Affiliation(s)
- Jerod M Kieser
- Department of Chemistry , Case Western Reserve University , 2080 Adelbert Road , Cleveland , Ohio 44106 , United States
| | - Zacharias J Kinney
- Department of Chemistry , Case Western Reserve University , 2080 Adelbert Road , Cleveland , Ohio 44106 , United States
| | - Joshua R Gaffen
- Department of Chemistry , Case Western Reserve University , 2080 Adelbert Road , Cleveland , Ohio 44106 , United States
| | - Sloane Evariste
- Department of Chemistry , Case Western Reserve University , 2080 Adelbert Road , Cleveland , Ohio 44106 , United States
| | - Alexandra M Harrison
- Department of Chemistry , Case Western Reserve University , 2080 Adelbert Road , Cleveland , Ohio 44106 , United States
| | - Arnold L Rheingold
- Department of Chemistry and Biochemistry , University of California, San Diego , La Jolla , California 92093 , United States
| | - John D Protasiewicz
- Department of Chemistry , Case Western Reserve University , 2080 Adelbert Road , Cleveland , Ohio 44106 , United States
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11
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Grineva AA, Filippov OA, Nefedov SE, Lugan N, César V, Valyaev DA. Direct Access to IMesF and IMesF2 by Electrophilic Fluorination of Abnormal N-Heterocyclic Carbenes. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00151] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Alina A. Grineva
- LCC-CNRS, Université de Toulouse, CNRS, 205 route de Narbonne, 31077 Toulouse Cedex 4, France
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 31 Leninsky Pr., Moscow 119991, Russia
| | - Oleg A. Filippov
- A.N. Nesmeyanov Institute of Organoelement Compounds (INEOS), Russian Academy of Sciences, GSP-1, B-334, 28 Vavilov str., Moscow 119991, Russia
| | - Sergei E. Nefedov
- Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 31 Leninsky Pr., Moscow 119991, Russia
| | - Noël Lugan
- LCC-CNRS, Université de Toulouse, CNRS, 205 route de Narbonne, 31077 Toulouse Cedex 4, France
| | - Vincent César
- LCC-CNRS, Université de Toulouse, CNRS, 205 route de Narbonne, 31077 Toulouse Cedex 4, France
| | - Dmitry A. Valyaev
- LCC-CNRS, Université de Toulouse, CNRS, 205 route de Narbonne, 31077 Toulouse Cedex 4, France
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12
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Wozniak AI, Bermesheva EV, Gavrilova NN, Ilyasov IR, Nechaev MS, Asachenko AF, Topchiy MA, Gribanov PS, Bermeshev MV. Addition Homo- and Copolymerizations of Dicyclopentadiene and 5-n
-Hexylnorbornene in the Presence of Pd-N-Heterocyclic Carbene Complexes. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201800323] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Alyona I. Wozniak
- Laboratory of Organosilicon and Carbocyclic Compounds; A. V. Topchiev Institute of Petrochemical Synthesis; RAS; 29 Leninskiy pr., 119991 Moscow Russia
| | - Evgeniya V. Bermesheva
- Laboratory of Organosilicon and Carbocyclic Compounds; A. V. Topchiev Institute of Petrochemical Synthesis; RAS; 29 Leninskiy pr., 119991 Moscow Russia
- I. M. Sechenov First Moscow State Medical University; Trubetskaya str., 8, building 2, 119991 Moscow Russia
| | - Natalia N. Gavrilova
- D. I. Mendeleyev University of Chemical Technology of Russia; 9 Miusskaya sq., 125047 Moscow Russia
| | - Igor R. Ilyasov
- I. M. Sechenov First Moscow State Medical University; Trubetskaya str., 8, building 2, 119991 Moscow Russia
| | - Mikhail S. Nechaev
- Laboratory of Organic Catalysis; A. V. Topchiev Institute of Petrochemical Synthesis; RAS, 29 Leninskiy pr., 119991 Moscow Russia
- Chemistry Department; M. V. Lomonosov Moscow State University; Leninskie Gory 1 (3), 119991 Moscow Russia
| | - Andrey F. Asachenko
- Laboratory of Organic Catalysis; A. V. Topchiev Institute of Petrochemical Synthesis; RAS, 29 Leninskiy pr., 119991 Moscow Russia
| | - Maxim A. Topchiy
- Laboratory of Organosilicon and Carbocyclic Compounds; A. V. Topchiev Institute of Petrochemical Synthesis; RAS; 29 Leninskiy pr., 119991 Moscow Russia
| | - Pavel S. Gribanov
- Laboratory of Organic Catalysis; A. V. Topchiev Institute of Petrochemical Synthesis; RAS, 29 Leninskiy pr., 119991 Moscow Russia
| | - Maxim V. Bermeshev
- D. I. Mendeleyev University of Chemical Technology of Russia; 9 Miusskaya sq., 125047 Moscow Russia
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13
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14
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Huynh HV. Electronic Properties of N-Heterocyclic Carbenes and Their Experimental Determination. Chem Rev 2018; 118:9457-9492. [DOI: 10.1021/acs.chemrev.8b00067] [Citation(s) in RCA: 446] [Impact Index Per Article: 74.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Han Vinh Huynh
- Department of Chemistry, Faculty of Science, National University of Singapore, 3 Science Drive 3, Singapore 117543, Republic of Singapore
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15
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Izquierdo F, Zinser C, Minenkov Y, Cordes DB, Slawin AMZ, Cavallo L, Nahra F, Cazin CSJ, Nolan SP. Insights into the Catalytic Activity of [Pd(NHC)(cin)Cl] (NHC=IPr, IPrCl
, IPrBr
) Complexes in the Suzuki-Miyaura Reaction. ChemCatChem 2017. [DOI: 10.1002/cctc.201701279] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Frédéric Izquierdo
- Concept Life Sciences; Discovery Park, Ramsgate Road Sandwich CT13 9FF UK
- EaStCHEM School of Chemistry; University of St Andrews; St Andrews KY16 9ST UK
| | - Caroline Zinser
- EaStCHEM School of Chemistry; University of St Andrews; St Andrews KY16 9ST UK
| | - Yury Minenkov
- Department KAUST Catalysis Centre, KCC; King Abdullah University of Science and Technology; Thuwal- 23955-6900 Saudi Arabia
| | - David B. Cordes
- EaStCHEM School of Chemistry; University of St Andrews; St Andrews KY16 9ST UK
| | | | - Luigi Cavallo
- Department KAUST Catalysis Centre, KCC; King Abdullah University of Science and Technology; Thuwal- 23955-6900 Saudi Arabia
| | - Fady Nahra
- Department of Chemistry; Center for Sustainable Chemistry; Ghent University; Krijgslaan 281-S3 9000 Gent Belgium
| | - Catherine S. J. Cazin
- Department of Chemistry; Center for Sustainable Chemistry; Ghent University; Krijgslaan 281-S3 9000 Gent Belgium
| | - Steven P. Nolan
- Department of Chemistry; Center for Sustainable Chemistry; Ghent University; Krijgslaan 281-S3 9000 Gent Belgium
- Chemistry Department, College of Science; King Saud University; Riyadh 11451 Saudi Arabia
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16
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Avinash I, Gupta V, Karthik V, Anantharaman G. A straightforward synthesis of 4,5-dihalofunctionalized imidazol-2-ylidene/imidazolyl-metal complexes from trihaloimidazolium salts/imidazoles: Structure and catalytic studies. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.09.018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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17
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The cyclooctadiene ligand in [IrCl(COD)] 2 is hydrogenated under transfer hydrogenation conditions: A study in the presence of PPh 3 and a strong base in isopropanol. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.10.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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18
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Teng Q, Huynh HV. A unified ligand electronic parameter based on 13C NMR spectroscopy of N-heterocyclic carbene complexes. Dalton Trans 2017; 46:614-627. [DOI: 10.1039/c6dt04222h] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The donor strengths of various mono- and bidentate ligands can be easily compared on a unified 13C NMR spectroscopic scale.
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Affiliation(s)
- Qiaoqiao Teng
- Department of Chemistry
- National University of Singapore
- 117543 Singapore
- Republic of Singapore
| | - Han Vinh Huynh
- Department of Chemistry
- National University of Singapore
- 117543 Singapore
- Republic of Singapore
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19
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Bavykina AV, Mautscke HH, Makkee M, Kapteijn F, Gascon J, Llabrés i Xamena FX. Base free transfer hydrogenation using a covalent triazine framework based catalyst. CrystEngComm 2017. [DOI: 10.1039/c7ce00561j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Isomerisation of allylic alcohols to saturated ketones can be efficiently catalysed by a heterogeneous molecular system resulting from IrIIICp* anchoring to a covalent triazine framework.
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Affiliation(s)
- A. V. Bavykina
- Catalysis Engineering
- Delft University of Technology
- Delft
- Netherlands
| | - H.-H. Mautscke
- Instituto de Tecnologia Quimica CSIC-UPV
- Universidad Politecnica de Valencia
- Consejo Superior de Investigaciones Científicas
- Valencia
- Spain
| | - M. Makkee
- Catalysis Engineering
- Delft University of Technology
- Delft
- Netherlands
| | | | - J. Gascon
- Catalysis Engineering
- Delft University of Technology
- Delft
- Netherlands
| | - F. X. Llabrés i Xamena
- Instituto de Tecnologia Quimica CSIC-UPV
- Universidad Politecnica de Valencia
- Consejo Superior de Investigaciones Científicas
- Valencia
- Spain
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20
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Affiliation(s)
- Dong Wang
- ISM, Université de Bordeaux, 351 Cours de la Libération, 33405 Talence Cedex, France
| | - Didier Astruc
- ISM, Université de Bordeaux, 351 Cours de la Libération, 33405 Talence Cedex, France
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