1
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Parfenova LV, Kovyazin PV, Bikmeeva AK, Palatov ER, Ivchenko PV, Nifant’ev IE, Khalilov LM. Catalytic Properties of Zirconocene-Based Systems in 1-Hexene Oligomerization and Structure of Metal Hydride Reaction Centers. Molecules 2023; 28:molecules28062420. [PMID: 36985393 PMCID: PMC10058051 DOI: 10.3390/molecules28062420] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 03/02/2023] [Accepted: 03/03/2023] [Indexed: 03/09/2023] Open
Abstract
Despite large-scale investigations of homogeneous single-site metallocene catalysts and systems based on them, there are still unsolved problems related to the control of their activity and chemo- and stereoselectivity. A solution to these problems is required to develop efficient methods for the synthesis of practically useful products of alkene transformations, such as dimers, oligomers, and polymers. Here we studied the catalytic activity of structurally diverse zirconocenes (L2ZrCl2, L = Cp, C5Me5, Ind, L2 = Me2CCp2, Me2SiCp2, Me2C2Cp2, rac-Me2CInd2, rac-H4C2Ind2, BIPh(Ind)2, H4C2[THInd]2), and co-catalysts activating the system, namely HAlBui2, MMAO-12, and (Ph3C)[B(C6F5)4], at low activator/Zr ratios in a 1-hexene oligomerization reaction. The influence of catalyst structure and system composition on the alkene conversion, the type of products, and the reaction stereoselectivity were investigated. The composition of hydride intermediates formed in the L2ZrCl2–HAlBui2–activator system (L2 = ansa-Me2CCp2, Ind) was studied by NMR spectroscopy. Participation of the bis-zirconium hydride complex as the precursor of catalytically active sites of the alkene dimerization reaction was shown.
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Affiliation(s)
- Lyudmila V. Parfenova
- Institute of Petrochemistry and Catalysis, Ufa Federal Research Center, Russian Academy of Sciences, Prosp. Oktyabrya, 141, 450075 Ufa, Russia
- Correspondence: ; Tel.: +7-347-284-3527
| | - Pavel V. Kovyazin
- Institute of Petrochemistry and Catalysis, Ufa Federal Research Center, Russian Academy of Sciences, Prosp. Oktyabrya, 141, 450075 Ufa, Russia
| | - Almira Kh. Bikmeeva
- Institute of Petrochemistry and Catalysis, Ufa Federal Research Center, Russian Academy of Sciences, Prosp. Oktyabrya, 141, 450075 Ufa, Russia
| | - Eldar R. Palatov
- Institute of Petrochemistry and Catalysis, Ufa Federal Research Center, Russian Academy of Sciences, Prosp. Oktyabrya, 141, 450075 Ufa, Russia
| | - Pavel V. Ivchenko
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskiye Gory, 119991 Moscow, Russia
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky Prosp. 29, 119991 Moscow, Russia
| | - Ilya E. Nifant’ev
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskiye Gory, 119991 Moscow, Russia
- A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Leninsky Prosp. 29, 119991 Moscow, Russia
| | - Leonard M. Khalilov
- Institute of Petrochemistry and Catalysis, Ufa Federal Research Center, Russian Academy of Sciences, Prosp. Oktyabrya, 141, 450075 Ufa, Russia
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2
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McDaniel T, Smith NE, Cueny E, Landis CR. Dual-Chain Polymerization at an Early Transition-Metal Single-Site Catalyst. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tanner McDaniel
- The Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Nicholas E. Smith
- The Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Eric Cueny
- The Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Clark R. Landis
- The Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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3
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Cueny ES. Chromophore Quench Labeling: Simulated Snapshots of Molar Mass Distributions for the Rapid Mechanistic Analysis of Catalytic Alkene Polymerization. ACS Catal 2022. [DOI: 10.1021/acscatal.1c04614] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Eric S. Cueny
- Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104, United States
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4
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Golub’ FS, Bolotov VA, Parmon VN. Current Trends in the Processing of Linear Alpha Olefins into Technologically Important Products: Part 2. CATALYSIS IN INDUSTRY 2021. [DOI: 10.1134/s2070050421030053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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5
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Ali A, Uddin A, Jamil MI, Shen X, Abbas M, Aziz T, Hussain M, Hussain S, Fang R, Fan Z, Guo L. Kinetics and mechanistic investigations of ethylene-propylene copolymerizations catalyzed with symmetrical metallocene and activated by TIBA/borate. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121929] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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6
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Cueny ES, Nieszala MR, Froese RDJ, Landis CR. Nature of the Active Catalyst in the Hafnium-Pyridyl Amido-Catalyzed Alkene Polymerization. ACS Catal 2021. [DOI: 10.1021/acscatal.1c00394] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Eric S. Cueny
- Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Megan R. Nieszala
- Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Robert D. J. Froese
- Core R&D, The Dow Chemical Company, 1776 Building, Midland, Michigan 48674, United States
| | - Clark R. Landis
- Department of Chemistry, University of Wisconsin−Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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7
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Ali A, Liu X, Guo Y, Akram MA, Wu H, Liu W, Khan A, Jiang B, Fu Z, Fan Z. Kinetics and mechanism of ethylene and propylene polymerizations catalyzed with ansa-zirconocene activated by borate/TIBA. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121366] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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8
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Affiliation(s)
- Jessica V. Lamb
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Jean-Charles Buffet
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Zoë R. Turner
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | | | - Dermot O’Hare
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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9
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Zaccaria F, Sian L, Zuccaccia C, Macchioni A. Ion pairing in transition metal catalyzed olefin polymerization. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2020. [DOI: 10.1016/bs.adomc.2019.08.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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10
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Desert X, Proutiere F, Welle A, Den Dauw K, Vantomme A, Miserque O, Brusson JM, Carpentier JF, Kirillov E. Zirconocene-Catalyzed Polymerization of α-Olefins: When Intrinsic Higher Activity Is Flawed by Rapid Deactivation. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00253] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xavier Desert
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35700 Rennes, France
| | - Fabien Proutiere
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35700 Rennes, France
| | - Alexandre Welle
- Total Research & Technology Feluy, Zone Industrielle Feluy C, B-7181 Seneffe, Belgium
| | - Katty Den Dauw
- Total Research & Technology Feluy, Zone Industrielle Feluy C, B-7181 Seneffe, Belgium
| | - Aurélien Vantomme
- Total Research & Technology Feluy, Zone Industrielle Feluy C, B-7181 Seneffe, Belgium
| | - Olivier Miserque
- Total Research & Technology Feluy, Zone Industrielle Feluy C, B-7181 Seneffe, Belgium
| | - Jean-Michel Brusson
- Total S.A., Direction R&D Groupe, Tour Michelet A, 24 Cours Michelet − La Défense 10, F-92069 Paris La Défense Cedex, France
| | - Jean-François Carpentier
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35700 Rennes, France
| | - Evgueni Kirillov
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, F-35700 Rennes, France
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11
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Quantification of active sites in single-site group 4 metal olefin polymerization catalysis. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.01.025] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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12
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Switzer JM, Pletcher PD, Steelman DK, Kim J, Medvedev GA, Abu-Omar MM, Caruthers JM, Delgass WN. Quantitative Modeling of the Temperature Dependence of the Kinetic Parameters for Zirconium Amine Bis(Phenolate) Catalysts for 1-Hexene Polymerization. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01989] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jeffrey M. Switzer
- Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Paul D. Pletcher
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - D. Keith Steelman
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Jungsuk Kim
- Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Grigori A. Medvedev
- Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Mahdi M. Abu-Omar
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - James M. Caruthers
- Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - W. Nicholas Delgass
- Davidson School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
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13
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Cueny ES, Johnson HC, Anding BJ, Landis CR. Mechanistic Studies of Hafnium-Pyridyl Amido-Catalyzed 1-Octene Polymerization and Chain Transfer Using Quench-Labeling Methods. J Am Chem Soc 2017; 139:11903-11912. [PMID: 28763618 DOI: 10.1021/jacs.7b05729] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Chromophore quench-labeling applied to 1-octene polymerization as catalyzed by hafnium-pyridyl amido precursors enables quantification of the amount of active catalyst and observation of the molecular weight distribution (MWD) of Hf-bound polymers via UV-GPC analysis. Comparison of the UV-detected MWD with the MWD of the "bulk" (all polymers, from RI-GPC analysis) provides important mechanistic information. The time evolution of the dual-detection GPC data, concentration of active catalyst, and monomer consumption suggests optimal activation conditions for the Hf pre-catalyst in the presence of the activator [Ph3C][B(C6F5)4]. The chromophore quench-labeling agents do not react with the chain-transfer agent ZnEt2 under the reaction conditions. Thus, Hf-bound polymeryls are selectively labeled in the presence of zinc-polymeryls. Quench-labeling studies in the presence of ZnEt2 reveal that ZnEt2 does not influence the rate of propagation at the Hf center, and chain transfer of Hf-bound polymers to ZnEt2 is fast and quasi-irreversible. The quench-label techniques represent a means to study commercial polymerization catalysts that operate with high efficiency at low catalyst concentrations without the need for specialized equipment.
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Affiliation(s)
- Eric S Cueny
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Heather C Johnson
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Bernie J Anding
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Clark R Landis
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
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14
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Preston AZ, Kim J, Medvedev GA, Delgass WN, Caruthers JM, Abu-Omar MM. Steric and Solvation Effects on Polymerization Kinetics, Dormancy, and Tacticity of Zr-Salan Catalysts. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00295] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andrew Z. Preston
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval
Drive, West Lafayette, Indiana 47907, United States
| | - Jungsuk Kim
- Charles
D. Davidson School of Chemical Engineering, Purdue University, Forney Hall of Chemical
Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Grigori A. Medvedev
- Charles
D. Davidson School of Chemical Engineering, Purdue University, Forney Hall of Chemical
Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - W. Nicholas Delgass
- Charles
D. Davidson School of Chemical Engineering, Purdue University, Forney Hall of Chemical
Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - James M. Caruthers
- Charles
D. Davidson School of Chemical Engineering, Purdue University, Forney Hall of Chemical
Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Mahdi M. Abu-Omar
- Department
of Chemistry and Biochemistry, Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106, United States
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15
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Dunn AL, Landis CR. Stopped-Flow NMR and Quantitative GPC Reveal Unexpected Complexities for the Mechanism of NHC-Catalyzed Lactide Polymerization. Macromolecules 2017. [DOI: 10.1021/acs.macromol.6b02139] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Anna L. Dunn
- Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Clark R. Landis
- Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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16
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Guo Y, Zhang Z, Guo W, Khan A, Fu Z, Xu J, Fan Z. Kinetics and mechanism of metallocene-catalyzed olefin polymerization: Comparison of ethylene, propylene homopolymerizations, and their copolymerization. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/pola.28439] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yintian Guo
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 China
| | - Zhen Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 China
| | - Wenqi Guo
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 China
| | - Akbar Khan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 China
| | - Zhisheng Fu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 China
| | - Junting Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 China
| | - Zhiqiang Fan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 China
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17
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Estes DP, Siddiqi G, Allouche F, Kovtunov KV, Safonova OV, Trigub AL, Koptyug IV, Copéret C. C–H Activation on Co,O Sites: Isolated Surface Sites versus Molecular Analogs. J Am Chem Soc 2016; 138:14987-14997. [DOI: 10.1021/jacs.6b08705] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Deven P. Estes
- Department of Chemistry and Applied Biosciences, Eidgenössische Technische Hochschule Zürich, CH-8093 Zürich, Switzerland
| | - Georges Siddiqi
- Department of Chemistry and Applied Biosciences, Eidgenössische Technische Hochschule Zürich, CH-8093 Zürich, Switzerland
| | - Florian Allouche
- Department of Chemistry and Applied Biosciences, Eidgenössische Technische Hochschule Zürich, CH-8093 Zürich, Switzerland
| | - Kirill V. Kovtunov
- International Tomography Center, SB RAS, 3A Institutskaya
St., Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova St. 2, Novosibirsk 630090, Russia
| | - Olga V. Safonova
- General Energy Research Department, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
| | - Alexander L. Trigub
- National Research Centre “Kurchatov Institute”, 1 Akademika Kurchatova Pl., 123182 Moscow, Russia
| | - Igor V. Koptyug
- International Tomography Center, SB RAS, 3A Institutskaya
St., Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova St. 2, Novosibirsk 630090, Russia
| | - Christophe Copéret
- Department of Chemistry and Applied Biosciences, Eidgenössische Technische Hochschule Zürich, CH-8093 Zürich, Switzerland
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18
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Nelsen DL, Anding BJ, Sawicki JL, Christianson MD, Arriola DJ, Landis CR. Chromophore Quench-Labeling: An Approach to Quantifying Catalyst Speciation As Demonstrated for (EBI)ZrMe2/B(C6F5)3-Catalyzed Polymerization of 1-Hexene. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01819] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- D. Luke Nelsen
- Department
of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Bernie J. Anding
- Department
of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Julie L. Sawicki
- Department
of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | | | - Daniel J. Arriola
- The Dow Chemical Company, 1776 Building, Midland, Michigan 48674, United States
| | - Clark R. Landis
- Department
of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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19
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Pletcher PD, Switzer JM, Steelman DK, Medvedev GA, Delgass WN, Caruthers JM, Abu-Omar MM. Quantitative Comparative Kinetics of 1-Hexene Polymerization across Group IV Bis-Phenolate Catalysts. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00974] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Paul D. Pletcher
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval
Drive, West Lafayette, Indiana 47907, United States
| | - Jeffrey M. Switzer
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - D. Keith Steelman
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval
Drive, West Lafayette, Indiana 47907, United States
| | - Grigori A. Medvedev
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - W. Nicholas Delgass
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - James M. Caruthers
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Mahdi M. Abu-Omar
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval
Drive, West Lafayette, Indiana 47907, United States
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
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20
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Chen CH, Shih WC, Hilty C. In Situ Determination of Tacticity, Deactivation, and Kinetics in [rac-(C2H4(1-Indenyl)2)ZrMe][B(C6F5)4] and [Cp2ZrMe][B(C6F5)4]-Catalyzed Polymerization of 1-Hexene Using 13C Hyperpolarized NMR. J Am Chem Soc 2015; 137:6965-71. [DOI: 10.1021/jacs.5b04479] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chia-Hsiu Chen
- Department of Chemistry, Texas A&M University, 3255 TAMU, College Station, Texas 77843-3255, United States
| | - Wei-Chun Shih
- Department of Chemistry, Texas A&M University, 3255 TAMU, College Station, Texas 77843-3255, United States
| | - Christian Hilty
- Department of Chemistry, Texas A&M University, 3255 TAMU, College Station, Texas 77843-3255, United States
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21
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Vatamanu M. Observation of zirconium allyl species formed during zirconocene-catalyzed propene polymerization and mechanistic insights. J Catal 2015. [DOI: 10.1016/j.jcat.2014.12.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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Nayeri HH, Taromi FA, Hemmati M, Rekabdar F. Preparation method of superactive Ziegler–Natta catalysts to produce ultra-high molecular weight amorphous poly(1-octene), poly(1-decene), and their copolymers. J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.958475] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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23
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Steelman DK, Xiong S, Medvedev GA, Delgass WN, Caruthers JM, Abu-Omar MM. Effects of Electronic Perturbations on 1-Hexene Polymerization Catalyzed by Zirconium Amine Bisphenolate Complexes. ACS Catal 2014. [DOI: 10.1021/cs5003788] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- D. Keith Steelman
- Brown
Laboratory and the Negishi Brown Institute for Catalysis (NBIC), Department
of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Silei Xiong
- School
of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Grigori A. Medvedev
- School
of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - W. Nicholas Delgass
- School
of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - James M. Caruthers
- School
of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Mahdi M. Abu-Omar
- Brown
Laboratory and the Negishi Brown Institute for Catalysis (NBIC), Department
of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
- School
of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
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24
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Park JH, Jang YE, Jeon JY, Go MJ, Lee J, Kim SK, Lee SI, Lee BY. Preparation of ansa-metallocenes for production of poly(α-olefin) lubricants. Dalton Trans 2014; 43:10132-8. [PMID: 24875269 DOI: 10.1039/c4dt00997e] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An ansa-zirconocene bearing methyl substituents at all positions adjacent to the bridgehead [(-C(Ph)HC(Ph)H-)(η(5)-2,5-Me2C5H2)2ZrCl2] (4) was prepared in high yields (78%) through the reductive dimerization of 1,4-dimethyl-6-phenylfulvene utilizing ZrCl2·DME generated in situ. The structure of 4 was subsequently confirmed using X-ray crystallography. 4 exhibited excellent catalytic performance with regard to 1-decene oligomerization, which was carried out with the intention of preparing lubricant base stocks. High activities (21 × 10(6) g mol(-1) Zr h(-1) activity; TON = 150 000; TOF = 42 s(-1)) were observed at temperatures as high as 120 °C and the oligomer distribution was appropriate for lubricant application. The simulated distillation (SIMDIS) data confirmed that a wide range of oligomers were formed, ranging from the dimer (2-mer) to 20-mer. A minimal amount of the dimer and oligomers larger than the 10-mer was formed (13 and 25 wt%, respectively). Alternatively, a typical unbridged complex such as (η(5)-nBuC5H4)2ZrCl2 primarily produced dimers (54 wt%), whereas the ansa-zirconocene (EBI)ZrCl2 primarily produced oligomers larger than 10-mer (62 wt%). The methyl substituents at the positions adjacent to the bridgehead in 4 played a significant role in the catalytic performance.
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Affiliation(s)
- Ji Hae Park
- Department of Molecular Science and Technology, Ajou University, Suwon 443-749, South Korea.
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25
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Brown HA, Xiong S, Medvedev GA, Chang YA, Abu-Omar MM, Caruthers JM, Waymouth RM. Zwitterionic Ring-Opening Polymerization: Models for Kinetics of Cyclic Poly(caprolactone) Synthesis. Macromolecules 2014. [DOI: 10.1021/ma500395j] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Hayley A. Brown
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Silei Xiong
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Grigori A. Medvedev
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Young A. Chang
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Mahdi M. Abu-Omar
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
- Brown
Laboratory, Department of Chemistry, Purdue University, 560 Oval
Drive, West Lafayette, Indiana 47907, United States
| | - James M. Caruthers
- Forney
Hall of Chemical Engineering, School of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Robert M. Waymouth
- Department
of Chemistry, Stanford University, Stanford, California 94305, United States
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26
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Steelman DK, Pletcher PD, Switzer JM, Xiong S, Medvedev GA, Delgass WN, Caruthers JM, Abu-Omar MM. Comparison of Selected Zirconium and Hafnium Amine Bis(phenolate) Catalysts for 1-Hexene Polymerization. Organometallics 2013. [DOI: 10.1021/om4006005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- D. Keith Steelman
- Brown Laboratory, Department
of Chemistry, Purdue University, 560 Oval
Drive, West Lafayette, Indiana 47907, United States
| | - Paul D. Pletcher
- Brown Laboratory, Department
of Chemistry, Purdue University, 560 Oval
Drive, West Lafayette, Indiana 47907, United States
| | - Jeffrey M. Switzer
- School of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering,
480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Silei Xiong
- School of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering,
480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Grigori A. Medvedev
- School of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering,
480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - W. Nicholas Delgass
- School of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering,
480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - James M. Caruthers
- School of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering,
480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
| | - Mahdi M. Abu-Omar
- Brown Laboratory, Department
of Chemistry, Purdue University, 560 Oval
Drive, West Lafayette, Indiana 47907, United States
- School of Chemical Engineering, Purdue University, Forney Hall of Chemical Engineering,
480 Stadium Mall Drive, West Lafayette, Indiana 47907, United States
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27
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Steelman DK, Xiong S, Pletcher PD, Smith E, Switzer JM, Medvedev GA, Delgass WN, Caruthers JM, Abu-Omar MM. Effects of Pendant Ligand Binding Affinity on Chain Transfer for 1-Hexene Polymerization Catalyzed by Single-Site Zirconium Amine Bis-Phenolate Complexes. J Am Chem Soc 2013; 135:6280-8. [PMID: 23517426 DOI: 10.1021/ja401474v] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- D. Keith Steelman
- Brown Laboratory, Department of
Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Silei Xiong
- School of Chemical
Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West
Lafayette, Indiana 47907, United States
| | - Paul D. Pletcher
- Brown Laboratory, Department of
Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Erin Smith
- Brown Laboratory, Department of
Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Jeffrey M. Switzer
- School of Chemical
Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West
Lafayette, Indiana 47907, United States
| | - Grigori A. Medvedev
- School of Chemical
Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West
Lafayette, Indiana 47907, United States
| | - W. Nicholas Delgass
- School of Chemical
Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West
Lafayette, Indiana 47907, United States
| | - James M. Caruthers
- School of Chemical
Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West
Lafayette, Indiana 47907, United States
| | - Mahdi M. Abu-Omar
- Brown Laboratory, Department of
Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
- School of Chemical
Engineering, Purdue University, Forney Hall of Chemical Engineering, 480 Stadium Mall Drive, West
Lafayette, Indiana 47907, United States
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28
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Bryliakov KP, Talsi EP. Frontiers of mechanistic studies of coordination polymerization and oligomerization of α-olefins. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.06.023] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Rocchigiani L, Ciancaleoni G, Zuccaccia C, Macchioni A. An Integrated NMR and DFT Study on the Single Insertion of α-Olefins into the MC Bond of Group 4 Metallaaziridinium Ion Pairs. ChemCatChem 2012. [DOI: 10.1002/cctc.201200341] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Switzer JM, Travia NE, Steelman DK, Medvedev GA, Thomson KT, Delgass WN, Abu-Omar MM, Caruthers JM. Kinetic Modeling of 1-Hexene Polymerization Catalyzed by Zr(tBu-ONNMe2O)Bn2/B(C6F5)3. Macromolecules 2012. [DOI: 10.1021/ma300129n] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Jeffrey M. Switzer
- School
of Chemical Engineering and ‡Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United
States
| | - Nicholas E. Travia
- School
of Chemical Engineering and ‡Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United
States
| | - D. Keith Steelman
- School
of Chemical Engineering and ‡Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United
States
| | - Grigori A. Medvedev
- School
of Chemical Engineering and ‡Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United
States
| | - Kendall T. Thomson
- School
of Chemical Engineering and ‡Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United
States
| | - W. Nicholas Delgass
- School
of Chemical Engineering and ‡Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United
States
| | - Mahdi M. Abu-Omar
- School
of Chemical Engineering and ‡Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United
States
| | - James M. Caruthers
- School
of Chemical Engineering and ‡Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United
States
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31
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Moscato BM, Zhu B, Landis CR. Mechanistic Investigations into the Behavior of a Labeled Zirconocene Polymerization Catalyst. Organometallics 2012. [DOI: 10.1021/om3000955] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Beth M. Moscato
- Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Bolin Zhu
- Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Clark R. Landis
- Department of Chemistry, University of Wisconsin—Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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32
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Manz TA, Caruthers JM, Sharma S, Phomphrai K, Thomson KT, Delgass WN, Abu-Omar MM. Structure–Activity Correlation for Relative Chain Initiation to Propagation Rates in Single-Site Olefin Polymerization Catalysis. Organometallics 2012. [DOI: 10.1021/om200884x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Thomas A. Manz
- School of Chemical Engineering and ‡Department
of Chemistry, Purdue University, West Lafayette, Indiana
47907, United States
| | - James M. Caruthers
- School of Chemical Engineering and ‡Department
of Chemistry, Purdue University, West Lafayette, Indiana
47907, United States
| | - Shalini Sharma
- School of Chemical Engineering and ‡Department
of Chemistry, Purdue University, West Lafayette, Indiana
47907, United States
| | - Khamphee Phomphrai
- School of Chemical Engineering and ‡Department
of Chemistry, Purdue University, West Lafayette, Indiana
47907, United States
| | - Kendall T. Thomson
- School of Chemical Engineering and ‡Department
of Chemistry, Purdue University, West Lafayette, Indiana
47907, United States
| | - W. Nicholas Delgass
- School of Chemical Engineering and ‡Department
of Chemistry, Purdue University, West Lafayette, Indiana
47907, United States
| | - Mahdi M. Abu-Omar
- School of Chemical Engineering and ‡Department
of Chemistry, Purdue University, West Lafayette, Indiana
47907, United States
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33
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Fan Z, Zhang L, Xia S, Fu Z. Effects of ethylene as comonomer on the active center distribution of 1-hexene polymerization with MgCl2-supported Ziegler–Natta catalysts. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcata.2011.09.021] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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34
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Rocchigiani L, Ciancaleoni G, Zuccaccia C, Macchioni A. Low-Temperature Kinetic NMR Studies on the Insertion of a Single Olefin Molecule into a ZrC Bond: Assessing the Counterion-Solvent Interplay. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201105122] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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35
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Rocchigiani L, Ciancaleoni G, Zuccaccia C, Macchioni A. Low-Temperature Kinetic NMR Studies on the Insertion of a Single Olefin Molecule into a ZrC Bond: Assessing the Counterion-Solvent Interplay. Angew Chem Int Ed Engl 2011; 50:11752-5. [DOI: 10.1002/anie.201105122] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Indexed: 11/09/2022]
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36
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Erb J, Paull DH, Dudding T, Belding L, Lectka T. From bifunctional to trifunctional (tricomponent nucleophile-transition metal-lewis acid) catalysis: the catalytic, enantioselective α-fluorination of acid chlorides. J Am Chem Soc 2011; 133:7536-46. [PMID: 21513338 PMCID: PMC3432319 DOI: 10.1021/ja2014345] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report in full detail our studies on the catalytic, asymmetric α-fluorination of acid chlorides, a practical method that produces an array of α-fluorocarboxylic acid derivatives in which improved yield and virtually complete enantioselectivity are controlled through electrophilic fluorination of a ketene enolate intermediate. We discovered, for the first time, that a third catalyst, a Lewis acidic lithium salt, could be introduced into a dually activated system to amplify yields of aliphatic products, primarily through activation of the fluorinating agent. Through our mechanistic studies (based on kinetic data, isotopic labeling, spectroscopic measurements, and theoretical calculations) we were able to utilize our understanding of this "trifunctional" reaction to optimize the conditions and obtain new products in good yield and excellent enantioselectivity.
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Affiliation(s)
- Jeremy Erb
- Department of Chemistry, New Chemistry Building, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland, 21218
| | - Daniel H. Paull
- Department of Chemistry, New Chemistry Building, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland, 21218
| | - Travis Dudding
- Department of Chemistry, Brock University, 500 Glenridge Avenue, St. Catharines, Ontario, Canada L2S 3A1
| | - Lee Belding
- Department of Chemistry, Brock University, 500 Glenridge Avenue, St. Catharines, Ontario, Canada L2S 3A1
| | - Thomas Lectka
- Department of Chemistry, Brock University, 500 Glenridge Avenue, St. Catharines, Ontario, Canada L2S 3A1
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37
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Baldwin SM, Bercaw JE, Brintzinger HH. Cationic alkylaluminum-complexed zirconocene hydrides as participants in olefin polymerization catalysis. J Am Chem Soc 2011; 132:13969-71. [PMID: 20860389 DOI: 10.1021/ja105040r] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The alkylaluminum-complexed zirconocene trihydride cation [(SBI)Zr(μ-H)(3)(Al(i)Bu(2))(2)](+), which is obtained by reaction of (SBI)ZrCl(2) with [Ph(3)C][B(C(6)F(5))(4)] and excess HAl(i)Bu(2) in toluene solution, catalyzes the formation of isotactic polypropene when exposed to propene at -30 °C. This cation remains the sole observable species in catalyst systems free of AlMe compounds. In the presence of AlMe(3), however, exposure to propene causes the trihydride cation to be completely converted, under concurrent consumption of all hydride species by propene hydroalumination, to the doubly Me-bridged cation [(SBI)Zr(μ-Me)(2)AlMe(2)](+). The latter then becomes the resting state for further propene polymerization, which produces, by chain transfer to Al, mainly AlMe(2)-capped isotactic polypropene.
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Affiliation(s)
- Steven M Baldwin
- Arnold and Mabel Beckman Laboratories of Chemical Synthesis, California Institute of Technology, Pasadena, California 91125, United States
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38
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Sauriol F, Sonnenberg JF, Chadder SJ, Dunlop-Brière AF, Baird MC, Budzelaar PHM. Remarkable Reactions and Intermediates in Titanocene(IV) Chemistry: Migratory Insertion Reactions of 2,2-Disubstituted-1-alkenes, Intramolecular 1,5-σ Bond Metathesis via ε-Agostic Interactions, and a Rare Example of a β-Agostic Alkyltitanocene Complex. J Am Chem Soc 2010; 132:13357-70. [DOI: 10.1021/ja104526v] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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39
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Moscato BM, Zhu B, Landis CR. GPC and ESI-MS Analysis of Labeled Poly(1-Hexene): Rapid Determination of Initiated Site Counts during Catalytic Alkene Polymerization Reactions. J Am Chem Soc 2010; 132:14352-4. [DOI: 10.1021/ja105775r] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Beth M. Moscato
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison Wisconsin 53706
| | - Bolin Zhu
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison Wisconsin 53706
| | - Clark R. Landis
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison Wisconsin 53706
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40
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Christianson MD, Tan EHP, Landis CR. Stopped-Flow NMR: Determining the Kinetics of [rac-(C2H4(1-indenyl)2)ZrMe][MeB(C6F5)3]-Catalyzed Polymerization of 1-Hexene by Direct Observation. J Am Chem Soc 2010; 132:11461-3. [DOI: 10.1021/ja105107y] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Matthew D. Christianson
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706
| | - Emily H. P. Tan
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706
| | - Clark R. Landis
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706
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41
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Bochmann M. The Chemistry of Catalyst Activation: The Case of Group 4 Polymerization Catalysts. Organometallics 2010. [DOI: 10.1021/om1004447] [Citation(s) in RCA: 296] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Manfred Bochmann
- Wolfson Materials and Catalysis Centre, School of Chemistry, University of East Anglia, Norwich NR4 7TJ, U.K
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