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Syndiospecific polymerization of styrene by half-metallocene with a naphthoxy group ligand. JOURNAL OF POLYMER RESEARCH 2023. [DOI: 10.1007/s10965-022-03411-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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2
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Kawamura K, Nomura K. Ethylene Copolymerization with Limonene and β-Pinene: New Bio-Based Polyolefins Prepared by Coordination Polymerization. Macromolecules 2021. [DOI: 10.1021/acs.macromol.1c00559] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kousei Kawamura
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Kotohiro Nomura
- Department of Chemistry, Graduate School of Science, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan
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3
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Yang M, Wang Y, Jian Y, Leng D, Zhang W, Zhang G, Sun H, Gao Z. A sustainable water-tolerant catalyst with enhanced Lewis acidity: Dual activation of Cp2TiCl2 via ligand and solvent. MOLECULAR CATALYSIS 2020. [DOI: 10.1016/j.mcat.2020.111247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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4
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Linnemannstöns M, Schwabedissen J, Neumann B, Stammler H, Berger RJF, Mitzel NW. Aryl-Aryl Interactions in (Aryl-Perhalogenated) 1,2-Diaryldisilanes. Chemistry 2020; 26:2169-2173. [PMID: 31859375 PMCID: PMC7065172 DOI: 10.1002/chem.201905727] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Indexed: 11/13/2022]
Abstract
Three 1,2-diaryltetramethyldisilanes X5 C6 -(SiMe2 )2 -C6 X5 with two C6 H5 , C6 F5 , or C6 Cl5 groups were studied concerning the importance of London dispersion driven interactions between their aryl groups. They were prepared from 1,2-dichlorotetramethyldisilane by salt elimination. Their structures were determined in the solid state by X-ray diffraction and for free molecules by gas electron-diffraction. The solid-state structures of the fluorinated and chlorinated derivatives are dominated by aryl-aryl interactions. Unexpectedly, Cl5 C6 -(SiMe2 )2 -C6 Cl5 exists exclusively as an eclipsed syn-conformer in the gas phase with strongly distorted Si-C6 Cl5 units due to strong intramolecular interactions. In contrast, F5 C6 -(SiMe2 )2 -C6 F5 reveals weaker interactions. The contributions to the total interaction energy were analyzed by SAPT calculations.
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Affiliation(s)
- Marvin Linnemannstöns
- Lehrstuhl für Anorganische Chemie und StrukturchemieFakultät für ChemieUniversität BielefeldUniversitätsstraße 2533615BielefeldGermany
| | - Jan Schwabedissen
- Chemie und Physik der MaterialienParis-Lodron-Universität SalzburgJakob-Haringer-Straße 2a5020SalzburgAustria
| | - Beate Neumann
- Lehrstuhl für Anorganische Chemie und StrukturchemieFakultät für ChemieUniversität BielefeldUniversitätsstraße 2533615BielefeldGermany
| | - Hans‐Georg Stammler
- Lehrstuhl für Anorganische Chemie und StrukturchemieFakultät für ChemieUniversität BielefeldUniversitätsstraße 2533615BielefeldGermany
| | - Raphael J. F. Berger
- Chemie und Physik der MaterialienParis-Lodron-Universität SalzburgJakob-Haringer-Straße 2a5020SalzburgAustria
| | - Norbert W. Mitzel
- Lehrstuhl für Anorganische Chemie und StrukturchemieFakultät für ChemieUniversität BielefeldUniversitätsstraße 2533615BielefeldGermany
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5
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Nomura K, Nagai G, Nasr A, Tsutsumi K, Kawamoto Y, Koide K, Tamm M. Synthesis of Half-Titanocenes Containing Anionic N-Heterocyclic Carbenes That Contain a Weakly Coordinating Borate Moiety, Cp′TiX2(WCA-NHC), and Their Use as Catalysts for Ethylene (Co)polymerization. Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00841] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Kotohiro Nomura
- Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Go Nagai
- Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Alexandre Nasr
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
| | - Ken Tsutsumi
- Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Yuta Kawamoto
- Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Koji Koide
- Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Matthias Tamm
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
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Song X, Cao L, Tanaka R, Shiono T, Cai Z. Optically Transparent Functional Polyolefin Elastomer with Excellent Mechanical and Thermal Properties. ACS Macro Lett 2019; 8:299-303. [PMID: 35650832 DOI: 10.1021/acsmacrolett.9b00005] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Synthesis of a variety of optically transparent polyolefin elastomers consisting of hard segment of polynorbornene and several kinds of soft segments such as atactic polypropylene, poly(ethylene-co-propylene), and poly(ethylene-co-1-hexene) was achieved. The block copolymers exhibited excellent toughness and thermal property with efficient elastic recovery. Most importantly, the introduction of hydroxyl group into polynorbornene segment not only modulated surface property of block copolymers, but also improved their mechanical properties.
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Affiliation(s)
- Xiangyang Song
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, People’s Republic of China
| | - Lixin Cao
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, People’s Republic of China
| | - Ryo Tanaka
- Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Takeshi Shiono
- Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Zhengguo Cai
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Material Science and Engineering, Donghua University, Shanghai 201620, People’s Republic of China
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7
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Boyde N, Steelman GW, Hanusa TP. Multicomponent Mechanochemical Synthesis of Cyclopentadienyl Titanium tert-Butoxy Halides, Cp x TiX y (O t Bu) 4-(x+y) ( x, y = 1, 2; X = Cl, Br). ACS OMEGA 2018; 3:8149-8159. [PMID: 31458952 PMCID: PMC6644457 DOI: 10.1021/acsomega.8b00943] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 07/05/2018] [Indexed: 06/10/2023]
Abstract
Titanium tert-butoxy halides of the formula Cp x TiX y (O t Bu)4-(x+y) (x, y = 1, 2; X = Cl, Br) have been prepared thorough milling the reagents without solvent. In the case of the chloride derivatives, Cp2TiCl2 is used as a starting material; in the case of the bromides, a mixture of LiCp, TiBr4, and Li[O t Bu] is used. The stoichiometric ratios of the starting materials are reflected in the major products of the reactions. Single-crystal X-ray structures are reported for Cp2TiCl(O t Bu), Cp2TiBr(O t Bu), and CpTiBr2(O t Bu), as well as for Cp2TiCl(O i Pr) and a redetermination of Cp2TiCl(OMe). The tert-butoxy derivatives are notable for their nearly linear Ti-O-C angles (>170°) that reflect Ti-O π-bonding, an interpretation supported with density functional theory calculations.
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Chen X, Zeng Y, Lan Z, You Q, Li T, Li X, Zhang D, Xie G. A Methylene-bridged salicylaldiminato tridentate [ONS] binuclear titanium complex for ethylene-norbornene copolymerization. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2018. [DOI: 10.1080/10601325.2018.1470467] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
Affiliation(s)
- Xiong Chen
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, South-Central University for Nationalities, Wuhan, China
| | - Yi Zeng
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, South-Central University for Nationalities, Wuhan, China
| | - Zhi Lan
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, South-Central University for Nationalities, Wuhan, China
| | - Qingliang You
- Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education, School of Chemical and Environmental Engineering, Jianghan University, Wuhan, China
| | - Tingcheng Li
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, South-Central University for Nationalities, Wuhan, China
| | - Xiangdan Li
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, South-Central University for Nationalities, Wuhan, China
| | - Daohong Zhang
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, South-Central University for Nationalities, Wuhan, China
| | - Guangyong Xie
- Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, Hubei Province, South-Central University for Nationalities, Wuhan, China
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Zanchin G, Pierro I, Parisini E, Martí-Rujas J, Ricci G, Leone G. Synthesis, structure and behavior of vanadium(III) diphosphine complexes in the homo- and co-polymerization of ethylene with norbornene: the ligand donor strength and bite angle make the difference. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.02.042] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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Wang H, Cheng H, Tanaka R, Shiono T, Cai Z. Efficient control of ethylene–norbornene copolymerization behavior of a fluorenylamido-ligated titanium complex: substituent effects of the amido ligand and copolymer properties. Polym Chem 2018. [DOI: 10.1039/c8py00943k] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copolymerization behavior of ethylene and norbornene was controlled using a (fluorenyl)(amido)titanium complex bearing a cumyl-amido ligand.
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Affiliation(s)
- Huajin Wang
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai 201620
- P. R. China
| | - Hailong Cheng
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai 201620
- P. R. China
| | - Ryo Tanaka
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima
- Japan
| | - Takeshi Shiono
- Graduate School of Engineering
- Hiroshima University
- Higashi-Hiroshima
- Japan
| | - Zhengguo Cai
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials
- College of Materials Science and Engineering
- Donghua University
- Shanghai 201620
- P. R. China
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11
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Yu KH, Huang SL, Liu YH, Wang Y, Liu ST, Cheng YC, Lin YF, Chen JT. Kinetics, Mechanism and Theoretical Studies of Norbornene-Ethylene Alternating Copolymerization Catalyzed by Organopalladium(II) Complexes Bearing Hemilabile α-Amino-pyridine. Molecules 2017; 22:E1095. [PMID: 28665348 PMCID: PMC6152412 DOI: 10.3390/molecules22071095] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 06/27/2017] [Indexed: 11/24/2022] Open
Abstract
Cationic methylpalladium complexes bearing hemilabile bidentate α-amino-pyridines can serve as effective precursors for catalytic alternating copolymerization of norbornene (N) and ethylene (E), under mild conditions. The norbornyl palladium complexes in the formula of {[RHNCH₂(o-C₆H₄N)]Pd(C₇H10Me)(NCMe)}(BF₄) (R = iPr (2a), tBu (2b), Ph (2c), 2,6-Me₂C₆H₃ (2d), 2,6-iPr₂C₆H₃ (2e)) were synthesized via single insertion of norbornene into the corresponding methylpalladium complexes 1a-1e, respectively. Both square planar methyl and norbornyl palladium complexes exhibit facile equilibria of geometrical isomerization, via sterically-controlled amino decoordination-recoordination of amino-pyridine. Kinetic studies of E-insertion, N-insertion of complexes 1 and 2, and the geometric isomerization reactions have been examined by means of VT-NMR, and found in excellent agreement with the results estimated by DFT calculations. The more facile N-insertion in the cis-isomers, and ready geometric isomerization, cooperatively lead to a new mechanism that accounts for the novel catalytic formation of alternating COC.
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Affiliation(s)
- Kuo-Hsuan Yu
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.
| | - Shou-Ling Huang
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.
| | - Yi-Hung Liu
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.
| | - Yu Wang
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.
| | - Shiuh-Tzung Liu
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.
| | - Yuan-Chung Cheng
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.
| | - Ya-Fan Lin
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.
- Department of Medicinal and Applied Chemistry, Kaohsiung Medical University, Kaohsiung 80708, Taiwan.
| | - Jwu-Ting Chen
- Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan.
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12
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Yan Q, Tsutsumi K, Nomura K. Synthesis and structural analysis of aryloxo-modified trinuclear half-titanocenes, and their use as catalyst precursors for ethylene polymerisation. RSC Adv 2017. [DOI: 10.1039/c7ra07581b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The synthesis and structural analysis of aryloxo-modified trinuclear half-titanocenes have been explored: the Cp* analogues showed higher activities for ethylene polymerisation than the related mononuclear analogues.
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Affiliation(s)
- Qing Yan
- Department of Chemistry
- Tokyo Metropolitan University
- Hachioji
- Japan
| | - Ken Tsutsumi
- Department of Chemistry
- Tokyo Metropolitan University
- Hachioji
- Japan
| | - Kotohiro Nomura
- Department of Chemistry
- Tokyo Metropolitan University
- Hachioji
- Japan
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13
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Design of Efficient Molecular Catalysts for Synthesis of Cyclic Olefin Copolymers (COC) by Copolymerization of Ethylene and α-Olefins with Norbornene or Tetracyclododecene. Catalysts 2016. [DOI: 10.3390/catal6110175] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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