1
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Okabe M, Nomura K. Propylene/Cyclic Olefin Copolymers with Cyclopentene, Cyclohexene, Cyclooctene, Tricyclo[6.2.1.0(2,7)]undeca-4-ene, and Tetracyclododecene: The Synthesis and Effect of Cyclic Structure on Thermal Properties. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01966] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Masaki Okabe
- Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Kotohiro Nomura
- Department of Chemistry, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan
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2
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Pérez-Ortega I, Albéniz AC. A Different Polynorbornene Backbone by Combination of Two Polymer Growth Pathways: Vinylic Addition and Ring Opening via β-C Elimination. Chem Sci 2022; 13:1823-1828. [PMID: 35282631 PMCID: PMC8826958 DOI: 10.1039/d1sc07028b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Accepted: 01/19/2022] [Indexed: 11/25/2022] Open
Abstract
A new polynorbornene skeleton has been found that contains bicyclic norbornane units and cyclohexenyl methyl linkages. The polymers have been synthesized using a nickel catalyst in the presence of a controlled amount of ligands with low or moderate coordination ability. The backbone structure is the result of a vinylic addition polymerization, via sequential insertions of norbornene into a Ni–C bond (bicyclic units) combined with an unusual ring opening of the norbornene structure by a β-C elimination (cyclohexenyl methyl units) to give a new Ni–C(alkyl) bond that continues the polymerization. The ring opening events are favored when the rate of propagation of the vinylic addition polymerization decreases, and this can be modulated by making the coordination of norbornene to the metal center less favorable using additional ligands. A new polynorbornene skeleton that contains a mixture of bicyclic norbornane units and cyclohexenylmethyl moieties can be obtained using a nickel catalyst.![]()
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Affiliation(s)
- Ignacio Pérez-Ortega
- IU CINQUIMA/Química Inorgánica, Universidad de Valladolid 47071 Valladolid Spain
| | - Ana C Albéniz
- IU CINQUIMA/Química Inorgánica, Universidad de Valladolid 47071 Valladolid Spain
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3
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Panyam PKR, Stöhr L, Wang D, Frey W, Buchmeiser MR. Chromium(VI) Bisimido Dichloro, Bisimido Alkylidene, and Chromium(V) Bisimido Iodo
N
‐Heterocyclic Carbene Complexes. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000550] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Pradeep K. R. Panyam
- Institut für Polymerchemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Laura Stöhr
- Institut für Polymerchemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Dongren Wang
- Institut für Polymerchemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Wolfgang Frey
- Institut für Organische Chemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Michael R. Buchmeiser
- Institut für Polymerchemie Universität Stuttgart Pfaffenwaldring 55 70569 Stuttgart Germany
- German Institutes of Textile and Fiber Research (DITF) Denkendorf Körschtalstr. 26 73770 Denkendorf Germany
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4
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Zhang Z, Wang Y, Wang W, Yamamoto Y, Bao M, Yu X. Convenient synthesis of tetracoordinated organoboron compounds via C H borylation of aryl-N-heteroaromatics with TfOB Bu2. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152199] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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5
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Podiyanachari SK, Moncho S, Brothers EN, Al-Meer S, Al-Hashimi M, Bazzi HS. One-Pot Tandem Ring-Opening and Ring-Closing Metathesis Polymerization of Disubstituted Cyclopentenes Featuring a Terminal Alkyne Functionality. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c00462] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
| | - Salvador Moncho
- Department of Chemistry, Texas A&M University at Qatar, P.O. Box 23874, Doha, Qatar
| | - Edward N. Brothers
- Department of Chemistry, Texas A&M University at Qatar, P.O. Box 23874, Doha, Qatar
| | - Saeed Al-Meer
- Central Laboratory Unit, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Mohammed Al-Hashimi
- Department of Chemistry, Texas A&M University at Qatar, P.O. Box 23874, Doha, Qatar
| | - Hassan S. Bazzi
- Department of Chemistry, Texas A&M University at Qatar, P.O. Box 23874, Doha, Qatar
- Department of Materials Science & Engineering, Texas A&M University, 209 Reed MacDonald Building, College Station, Texas 77843-3003, United States
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6
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Harakawa H, Okabe M, Nomura K. The synthesis of cyclic olefin copolymers (COCs) by ethylene copolymerisations with cyclooctene, cycloheptene, and with tricyclo[6.2.1.0(2,7)]undeca-4-ene: the effects of cyclic monomer structures on thermal properties. Polym Chem 2020. [DOI: 10.1039/d0py00940g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of amorphous ethylene copolymers with cycloheptene, cis-cyclooctene, or tricyclo[6.2.1.0(2,7)]undeca-4-ene using half-titanocene catalysts and the effects of ring size and structure on the thermal properties have been demonstrated.
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Affiliation(s)
- Hitoshi Harakawa
- Department of Chemistry
- Tokyo Metropolitan University
- Tokyo 192-0397
- Japan
| | - Masaki Okabe
- Department of Chemistry
- Tokyo Metropolitan University
- Tokyo 192-0397
- Japan
| | - Kotohiro Nomura
- Department of Chemistry
- Tokyo Metropolitan University
- Tokyo 192-0397
- Japan
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7
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Krappitz T, Jovic K, Feist F, Frisch H, Rigoglioso VP, Blinco JP, Boydston AJ, Barner-Kowollik C. Hybrid Photo-induced Copolymerization of Ring-Strained and Vinyl Monomers Utilizing Metal-Free Ring-Opening Metathesis Polymerization Conditions. J Am Chem Soc 2019; 141:16605-16609. [PMID: 31592659 DOI: 10.1021/jacs.9b09025] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We introduce the hybrid copolymerization of two disparate monomer classes (vinyl monomers and ring-strained cyclic olefins) via living photopolymerization. The living character of the polymerization technique (metal-free photo-ROMP) is demonstrated by consecutive chain-extensions. Further, we propose a mechanism for the copolymerization and analyze the copolymer structure in detail by high-resolution mass spectrometry.
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Affiliation(s)
- Tim Krappitz
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology (QUT) , 2 George Street , Brisbane , QLD 4000 , Australia
| | - Kristina Jovic
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology (QUT) , 2 George Street , Brisbane , QLD 4000 , Australia
| | - Florian Feist
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology (QUT) , 2 George Street , Brisbane , QLD 4000 , Australia.,Max Planck Institute for Polymer Research , Ackermannweg 10 , 55128 Mainz , Germany
| | - Hendrik Frisch
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology (QUT) , 2 George Street , Brisbane , QLD 4000 , Australia
| | - Vincent P Rigoglioso
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
| | - James P Blinco
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology (QUT) , 2 George Street , Brisbane , QLD 4000 , Australia
| | - Andrew J Boydston
- Department of Chemistry , University of Wisconsin-Madison , 1101 University Avenue , Madison , Wisconsin 53706 , United States
| | - Christopher Barner-Kowollik
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology (QUT) , 2 George Street , Brisbane , QLD 4000 , Australia.,Macromolecular Architectures, Institut für Technische Chemie und Polymerchemie , Karlsruhe Institute of Technology (KIT) , Engesserstraße 18 , 76131 Karlsruhe , Germany
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8
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Keyes A, Basbug Alhan HE, Ordonez E, Ha U, Beezer DB, Dau H, Liu Y, Tsogtgerel E, Jones GR, Harth E. Olefins and Vinyl Polar Monomers: Bridging the Gap for Next Generation Materials. Angew Chem Int Ed Engl 2019; 58:12370-12391. [DOI: 10.1002/anie.201900650] [Citation(s) in RCA: 129] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Indexed: 01/10/2023]
Affiliation(s)
- Anthony Keyes
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Hatice E. Basbug Alhan
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Estela Ordonez
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Uyen Ha
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Dain B. Beezer
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Huong Dau
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Yu‐Sheng Liu
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Enkhjargal Tsogtgerel
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Glen R. Jones
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Eva Harth
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
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9
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Keyes A, Basbug Alhan HE, Ordonez E, Ha U, Beezer DB, Dau H, Liu Y, Tsogtgerel E, Jones GR, Harth E. Olefine und polare Vinylmonomere: Überbrückung der Lücke für Materialien der nächsten Generation. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201900650] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Anthony Keyes
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Hatice E. Basbug Alhan
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Estela Ordonez
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Uyen Ha
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Dain B. Beezer
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Huong Dau
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Yu‐Sheng Liu
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Enkhjargal Tsogtgerel
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Glen R. Jones
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
| | - Eva Harth
- Department of ChemistryCenter of Excellence in Polymer ChemistryUniversity of Houston 3585 Cullen Boulevard Houston Texas 77030 USA
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10
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van der Ende M, Wang D, Frey W, Buchmeiser MR. Pentamethylcyclopentadienyl Titanium(IV) Amido Pyridylene Phenylene and Pentamethylcyclopentadienyl Titanacyclopropane Amido Complexes and their Behavior in the Polymerization of Ethylene and Cyclic Olefins. ChemCatChem 2017. [DOI: 10.1002/cctc.201601495] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Melita van der Ende
- Institute of Polymer Chemistry; University of Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Dongren Wang
- Institute of Polymer Chemistry; University of Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Wolfgang Frey
- Institute of Organic Chemistry; University of Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Michael R. Buchmeiser
- Institute of Polymer Chemistry; University of Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
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11
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Buchmeiser MR. Tandem Ring-Opening Metathesis - Vinyl Insertion Polymerization: Fundamentals and Application to Functional Polyolefins. Macromol Rapid Commun 2017; 38. [DOI: 10.1002/marc.201600672] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Michael R. Buchmeiser
- Institute of Polymer Chemistry; University of Stuttgart; Pfaffenwaldring 55 D-70569 Stuttgart Germany
- Institute of Textile Chemistry and Chemical Fibers; Körschtalstr. 26 D-73770 Denkendorf Germany
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12
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Hafeez M, Riaz M. Aminopyridine stabilized group-IV metal complexes and their applications. APPLIED PETROCHEMICAL RESEARCH 2016. [DOI: 10.1007/s13203-016-0170-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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13
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Ciftci M, Arslan M, Buchmeiser M, Yagci Y. Polyethylene- g-Polystyrene Copolymers by Combination of ROMP, Mn 2(CO) 10-Assisted TEMPO Substitution and NMRP. ACS Macro Lett 2016; 5:946-949. [PMID: 35607209 DOI: 10.1021/acsmacrolett.6b00460] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis of polyethylene-graft-polystyrene copolymers by a multistep "grafting from" approach is described. In the first step, a bromo-functional polyethylene (PE-Br) was synthesized via ring-opening metathesis polymerization (ROMP) of cis-cyclooctene (COE) and quantitative hydrobromination. Subsequent irradiation of PE-Br under visible light in the presence of dimanganese decacarbonyl (Mn2(CO)10) and 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) resulted in the formation of TEMPO-substituted polyethylene (PE-TEMPO). Polystyrene (PS) chains were then grown via nitroxide mediated radical polymerization (NMRP) from the PE-TEMPO precursor to give desired PE-g-PS copolymers in a controlled manner. The intermediates at each step and final graft copolymers were characterized by 1H NMR, FT-IR, GPC, and DSC analyses.
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Affiliation(s)
- Mustafa Ciftci
- Department
of Chemistry, Istanbul Technical University, Maslak, TR-34469, Istanbul, Turkey
| | - Mustafa Arslan
- Department
of Chemistry, Istanbul Technical University, Maslak, TR-34469, Istanbul, Turkey
| | - Michael Buchmeiser
- Institute
of Polymer Chemistry, University of Stuttgart, Pfaffenwaldring 55, D-70550 Denkendorf, Germany
| | - Yusuf Yagci
- Department
of Chemistry, Istanbul Technical University, Maslak, TR-34469, Istanbul, Turkey
- Center
of Excellence for Advanced Materials Research (CEAMR) and Chemistry
Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia
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14
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Xu G, Narayana GV, Speiser M, Wang D, Zou Y, Buchmeiser MR. Poly(ethylene)-co-Poly(norborn-2-ene) Prepared by Group IV Bisamido and Half-Sandwich Amido Complexes with Pendant Aminoborane Groups: Vinyl Insertion vs Ring-Opening Metathesis Polymerization. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201400032] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Guangjuan Xu
- Institute of Polymer Chemistry; University of Stuttgart; Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Gurram Venkata Narayana
- Institute of Polymer Chemistry; University of Stuttgart; Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Maria Speiser
- Institute of Polymer Chemistry; University of Stuttgart; Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Dongren Wang
- Institute of Polymer Chemistry; University of Stuttgart; Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Yuanlin Zou
- Institute of Polymer Chemistry; University of Stuttgart; Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Michael R. Buchmeiser
- Institute of Polymer Chemistry; University of Stuttgart; Pfaffenwaldring 55 D-70569 Stuttgart Germany
- Institute of Textile Chemistry and Chemical Fibers; Körschtalstrasse 26 D-73770 Denkendorf Germany
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15
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Xiao Q, Meng X, Kanai M, Kuninobu Y. Palladium-Catalyzed CH Fluorosilylation of 2-Phenylpyridines: Synthesis of Silafluorene Equivalents. Angew Chem Int Ed Engl 2014; 53:3168-72. [DOI: 10.1002/anie.201310293] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2013] [Indexed: 12/23/2022]
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16
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Narayana GV, Xu G, Wang D, Speiser M, Frey W, Buchmeiser MR. Stereospecific Styrene Polymerization by Methylalumoxane-Activated Ti (IV) N
-Trimethylsilylamido Complexes Bearing the N
-Biphenyl or N
-(6-(2-(Diethylboryl)phenyl)-Pyrid-2-yl) Motif. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201300764] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Gurram Venkata Narayana
- Institut für Polymerchemie, Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Universität Stuttgart; Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Guangjuan Xu
- Institut für Polymerchemie, Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Universität Stuttgart; Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Dongren Wang
- Institut für Polymerchemie, Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Universität Stuttgart; Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Maria Speiser
- Institut für Polymerchemie, Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Universität Stuttgart; Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Wolfgang Frey
- Institut für Organische Chemie, Universität Stuttgart; Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Michael R. Buchmeiser
- Institut für Polymerchemie, Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Universität Stuttgart; Pfaffenwaldring 55 D-70569 Stuttgart Germany
- Textilchemie und Chemiefasern (ITCF); Körschtalstr. 26 D-73770 Denkendorf Germany
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17
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Xiao Q, Meng X, Kanai M, Kuninobu Y. Palladium-Catalyzed CH Fluorosilylation of 2-Phenylpyridines: Synthesis of Silafluorene Equivalents. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201310293] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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18
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Narayana GV, Xu G, Wang D, Frey W, Buchmeiser MR. Access to Ultra-High-Molecular Weight Poly(ethylene) and Activity Boost in the Presence of Cyclopentene With Group 4 Bis-Amido Complexes. Chempluschem 2014; 79:151-162. [PMID: 31986760 DOI: 10.1002/cplu.201300378] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Indexed: 11/06/2022]
Abstract
ZrIV complexes of the type [Me2 Si{(NR)(6-{2-(diethylboryl)phenyl}pyridyl-2-yl-N)}ZrCl2 ⋅thf] (R=tBu (4), adamantyl (7 a); thf=tetrahydrofuran), [Me2 Si{(NAd)(6-{2-(diphenylboryl)phenyl}pyridyl-2-yl-N)}ZrCl2 ] (Ad=adamantyl (7 b)), the nonbridged half-titanocene complexes of the type [(N-{6-(2-diethylborylphenyl)pyrid-2-yl}-NR)Cp'TiCl2 ] (R=Me, Cp'=C5 H5 (12), Cp'=C5 Me5 (13)), and the titanium(IV)-based metallocene-type complex [bis{N-(6-{2-(diethylboryl)phenyl}pyrid-2-yl)NMe}TiCl2 ] (14) have been synthesized. The structures of complexes 7 b, 12, and 13 were determined by single-crystal X-ray diffraction analysis. In solution, complex 4 slowly rearranges to [Me2 Si{(N-tBu)(6-{2-(diethylboryl)phenyl}pyridyl-2-yl-N)}2 Zr] (4 a), the structure of which was unambiguously confirmed by single-crystal X-ray crystallography. Similarly, reaction of HfCl4 with Me2 Si({RNLi}{6-[2-(diethylboryl)phenyl]pyridyl-2-ylNLi}) yielded the corresponding HfIV complexes [Me2 Si{(NR)(6-{2-(diethylboryl)phenyl}pyridyl-2-ylN)}2 Hf] (R=tBu (8) and Ad (9)). Upon activation of these complexes with methylalumoxane (MAO), complexes 4, 7 a, 7 b, and 12-14 showed activities up to 750 kg of polyethylene (PE)/molcat. bar h in the homopolymerization of ethylene (E), producing mainly linear PE (high-density PE, HDPE) with molecular weights in the range of 1 800 000<Mn <4×106 g mol-1 . In the copolymerization of E with cyclopentene (CPE), the polymerization activities of complexes 4, 7 a, and 7 b can be enhanced by a factor of 140 up to 7500 kg PE/molcat. bar h, which produced PE-co-poly(CPE) containing 3.5 mol % of CPE. This dramatic increase in polymerization activity for E in the presence of CPE can be attributed to an involvement of CPE in the polymerization process rather than to solvent polarity.
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Affiliation(s)
- Gurram Venkata Narayana
- Institut für Polymerchemie, Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart (Germany), Fax: (+49) 711-685-64050
| | - Guangjuan Xu
- Institut für Polymerchemie, Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart (Germany), Fax: (+49) 711-685-64050
| | - Dongren Wang
- Institut für Polymerchemie, Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart (Germany), Fax: (+49) 711-685-64050
| | - Wolfgang Frey
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart (Germany)
| | - Michael R Buchmeiser
- Institut für Polymerchemie, Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart (Germany), Fax: (+49) 711-685-64050.,Institut für Textilchemie und Chemiefasern (ITCF), Körschtalstrasse 26, 73770 Denkendorf (Germany)
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19
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Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2011. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2013.05.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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20
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Tao WJ, Li JF, Peng AQ, Sun XL, Yang XH, Tang Y. Water as an Activator for Palladium(II)-Catalyzed Olefin Polymerization. Chemistry 2013; 19:13956-61. [DOI: 10.1002/chem.201300890] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2013] [Revised: 07/07/2013] [Indexed: 11/07/2022]
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21
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Herz K, Imbrich DA, Unold J, Xu G, Speiser M, Buchmeiser MR. Functional ROMP-Derived Poly(cyclopentene)s. MACROMOL CHEM PHYS 2013. [DOI: 10.1002/macp.201300264] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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22
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Zhu L, Lin NT, Xie ZY, Lee SL, Huang SL, Yang JH, Lee YD, Chen CH, Chen CH, Luh TY. Ruthenium-Catalyzed Cascade Metathetical Cyclopolymerization of Bisnorbornenes with Flexible Linkers. Macromolecules 2013. [DOI: 10.1021/ma302293q] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lei Zhu
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106
- Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, Lingling Lu, Shanghai, China 200032
| | - Nai-Ti Lin
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106
| | - Zhen-Yu Xie
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106
- Genomic Research Center, Academia Sinica, Nangang, Taipei, Taiwan 115
| | - Shern-Long Lee
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106
| | - Shou-Ling Huang
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106
| | - Jian-He, Yang
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan 300
| | - Yu-Der, Lee
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, Taiwan 300
| | - Chun-hsien Chen
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106
| | - Chung-Hsuan Chen
- Genomic Research Center, Academia Sinica, Nangang, Taipei, Taiwan 115
| | - Tien-Yau Luh
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106
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23
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Fomine S, Tlenkopatchev MA. Metathesis transformations of terpenes. Computational modeling of (−)-α-pinene ring opening by ruthenium and tungsten carbene catalysts. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2011.12.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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24
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Zou Y, Wang D, Wurst K, Kühnel C, Reinhardt I, Decker U, Gurram V, Camadanli S, Buchmeiser MR. Group 4 dimethylsilylenebisamido complexes bearing the 6-[2-(diethylboryl)phenyl]pyrid-2-yl motif: synthesis and use in tandem ring-opening metathesis/vinyl-insertion copolymerization of cyclic olefins with ethylene. Chemistry 2011; 17:13832-46. [PMID: 22076737 DOI: 10.1002/chem.201101829] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2011] [Indexed: 11/07/2022]
Abstract
Two novel Zr(IV)- and Hf(IV)-based bisamido complexes bearing the 6-[2-(diethylboryl)phenyl]pyrid-2-yl motif, that is, [ZrCl(2){Me(2)Si(DbppN)(2)}(thf)] (9) and [HfCl(2){Me(2)Si(DbppN)(2)}(thf)(2)] (10) (DbppN=6-[2-(diethylboryl)phenyl]pyridine-2-amido) have been prepared. Their reactivities have been compared with that of a model precatalyst that does not bear the aminoborane motif. Upon activation with methylalumoxane, precatalysts 9 and 10 are active in the homopolymerization of ethylene (E) yielding high-density polyethylene (HDPE). In the copolymerization of E with cyclopentene (CPE), for example by the action of 9, the presence of CPE resulted in a dramatic increase in the polymerization activity of E, while CPE incorporation remained close to or at zero. In the vinyl-insertion copolymerization of norborn-2-ene (NBE) with E by the action of 9, statistical cyclic olefin copolymers of these two monomers were obtained. At higher NBE concentrations, however, 9 gave rise to reversible ring-opening metathesis (ROMP)/vinyl-insertion polymerization (VIP) of NBE with E, resulting in the formation of multi-block copolymers of the general formula poly(NBE)(ROMP)-co-poly(NBE)(VIP)-co-poly(E). This particular feature of precatalyst 9, that is, the ability to induce a reversible α-H elimination/α-H addition reaction, is attributed to the unique role of the 6-[2-(diethylboryl)phenyl]pyrid-2-yl ligand. Accordingly, a model precatalyst lacking this ligand does not have the ability to induce α-H elimination/α-H addition reactions. The different (11)B NMR shifts of various diethylborylphenylpyrid-2-ylamines and -amides permit a ranking of the strengths of the B-N bonds in these compounds. This strength of the B-N bond is correlated with the propensity of 9/MAO to produce poly(NBE)(ROMP)-co-poly(NBE)(VIP)-co-poly(E) at different temperatures.
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Affiliation(s)
- Yuanlin Zou
- Leibniz-Institut für Oberflächenmodifizierung, Permoserstrasse 15, 04318 Leipzig, Germany
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25
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Camadanli S, Decker U, Kühnel C, Reinhardt I, Buchmeiser MR. Homopolymerization of ethylene, 1-hexene, styrene and copolymerization of styrene with 1,3-cyclohexadiene using (η⁵-tetramethylcyclopentadienyl)dimethylsilyl(N-Ar')amido-TiCl₂/MAO (Ar'=6-(2-(diethylboryl)phenyl)pyrid-2-yl, biphen-3-yl). Molecules 2011; 16:567-82. [PMID: 21240147 PMCID: PMC6259193 DOI: 10.3390/molecules16010567] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2010] [Revised: 01/09/2011] [Accepted: 01/13/2011] [Indexed: 11/16/2022] Open
Abstract
The propensity of a half-sandwich (η⁵-tetramethylcyclopentadienyl) dimethylsilylamido Ti(IV)-based catalyst bearing an auxiliary diethylboryl-protected pyridyl moiety (Ti-8), activated by methylaluminoxane (MAO) to homopolymerize α-olefins such as ethylene, 1-hexene and styrene as well as to copolymerize styrene with 1,3-cyclo-hexadiene is described. The reactivity of Ti-8 was investigated in comparison to a 6-(2-(diethylboryl)phenyl)pyrid-2-yl-free analogue (Ti-3).
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Affiliation(s)
- Sebnem Camadanli
- Leibniz-Institut für Oberflächenmodifizierung e.V., Permoserstr. 15, D-04318, Leipzig, Germany
| | - Ulrich Decker
- Leibniz-Institut für Oberflächenmodifizierung e.V., Permoserstr. 15, D-04318, Leipzig, Germany
| | - Christa Kühnel
- Leibniz-Institut für Oberflächenmodifizierung e.V., Permoserstr. 15, D-04318, Leipzig, Germany
| | - Ingrid Reinhardt
- Leibniz-Institut für Oberflächenmodifizierung e.V., Permoserstr. 15, D-04318, Leipzig, Germany
| | - Michael R. Buchmeiser
- Lehrstuhl für Makromolekulare Stoffe und Faserchemie, Institut für Polymerchemie, Universität Stuttgart, Pfaffenwaldring 55, D-70550, Stuttgart, Germany
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