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Synthesis of Ethylene/1-Octene Copolymers with Ultrahigh Molecular Weights by Zr and Hf Complexes Bearing Bidentate NN Ligands with the Camphyl Linker. Catalysts 2021. [DOI: 10.3390/catal11020276] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Ultrahigh molecular weight polyethylene (UHMWPE) is a class of high-performance engineering plastics, exhibiting a unique set of properties and applications. Although many advances have been achieved in recent years, the synthesis of UHMWPE is still a great challenge. In this contribution, a series of zirconium and hafnium complexes, [2,6-(R1)2-4-R2-C6H2-N-C(camphyl)=C(camphyl)-N-2,6-(R1)2-4-R2-C6H2]MMe2(THF) (1-Zr: R1 = Me, R2 = H, M = Zr; 2-Zr: R1 = Me, R2 = Me, M = Zr; 1-Hf: R1 = Me, R2 = H, M = Hf; 2-Hf: R1 = Me, R2 = Me, M = Hf), bearing bidentate NN ligands with the bulky camphyl backbone were synthesized by the stoichiometric reactions of α-diimine ligands with MMe4 (M = Hf or Zr). All Zr and Hf metal complexes were analyzed using 1H and 13C NMR spectroscopy, and the molecular structures of complexes 1-Zr and 1-Hf were determined by single-crystal X-ray diffraction, revealing that the original α-diimine ligand was selectively reduced into the ene-diamido form and generated an 1,3-diaza-2-metallocyclopentene ring in the metal complexes. Zr complexes 1-Zr and 2-Zr showed moderate activity (up to 388 kg(PE)·mol−1(M)·h−1), poor copolymerization ability, but unprecedented molecular weight capability toward ethylene/1-octene copolymerization. Therefore, copolymers with ultrahigh molecular weights (>600 or 337 × 104 g∙mol−1) were successfully synthesized by 1-Zr or 2-Zr, respectively, with the borate cocatalyst [Ph3C][B(C6F5)4]. Surprisingly, Hf complexes 1-Hf and 2-Hf showed negligible activity under otherwise identical conditions, revealing the great influence of metal centers on catalytic performances.
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2
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Vignesh A, Zhang Q, Ma Y, Liang T, Sun WH. Attaining highly branched polyethylene elastomers by employing modified α-diiminonickel(II) catalysts: Probing the effects of enhancing fluorine atom on the ligand framework towards mechanical properties of polyethylene. POLYMER 2020. [DOI: 10.1016/j.polymer.2019.122089] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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3
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Suslov DS, Bykov MV, Kravchenko OV. Norbornene Addition Polymerization with Catalysts Based on Transition Metal Compounds: 2008–2018. POLYMER SCIENCE SERIES C 2019. [DOI: 10.1134/s181123821901017x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Effects of backbone substituent and intra-ligand hydrogen bonding interaction on ethylene polymerizations with α-diimine nickel catalysts. J Catal 2019. [DOI: 10.1016/j.jcat.2019.05.026] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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Zheng Q, Zheng D, Han B, Liu S, Li Z. Chromium complexes supported by the bidentate PN ligands: synthesis, characterization and application for ethylene polymerization. Dalton Trans 2018; 47:13459-13465. [PMID: 30183787 DOI: 10.1039/c8dt02834f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Chromium-based complexes are among the most important catalysts in the field of ethylene polymerization and oligomerization. Heterogeneous Cr Phillips catalysts account for more than one-third of the commercialized high density polyethylene (HDPE). In this contribution, chromium complexes, LCrCl3 (Cr1-Cr4: L = 2,6-R1-4-R2-C6H2-N[double bond, length as m-dash]CH-C6H4-2-PPh2; Cr1: R1 = H, R2 = H; Cr2: R1 = Me, R2 = H; Cr3: R1 = iPr, R2 = H; Cr4: R1 = Ph2CH, R2 = iPr), have been synthesized and characterized by elemental analysis, ESI and IR spectroscopy. The molecular structures of Cr3 and Cr4 are defined by X-ray diffraction, revealing a distorted octahedral geometry around the chromium center in both structures. In the presence of an aluminum cocatalyst, complexes Cr1-Cr4 show moderate to high activities toward ethylene polymerization. The nature of the catalysts and various reaction conditions, such as the nature and the amount of cocatalyst, reaction time and temperature, are investigated in detail. The results show that the title complexes have good thermal stability and the substituents on the ligands significantly affect the catalytic properties. Particularly, complex Cr4 can produce HDPE with a high molecular weight up to 68.3 × 104 g mol-1 due to the suppression of the chain transfer/termination by the introduction of bulky Ph2CH groups.
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Affiliation(s)
- Quande Zheng
- Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department; College of Polymer Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China.
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6
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Kimiaghalam M, Isfahani HN, Zohuri GH, Keivanloo A. Single and binary catalyst systems based on nickel and palladium in polymerization of ethylene. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4153] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Mahsa Kimiaghalam
- Department of ChemistryShahrood University of Technology PO Box 3619995161 Shahrood Iran
| | - Hossein Nasr Isfahani
- Department of ChemistryShahrood University of Technology PO Box 3619995161 Shahrood Iran
| | - Gholam Hossein Zohuri
- Department of Chemistry, Faculty of SciencesFerdowsi University of Mashhad PO Box 91775 Mashhad Iran
| | - Ali Keivanloo
- Department of ChemistryShahrood University of Technology PO Box 3619995161 Shahrood Iran
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7
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Controlled random copolymerization of rac
-lactide and ɛ
-caprolactone by well-designed phenoxyimine Al complexes. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28932] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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8
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Ngcobo M, Ojwach SO. Structural and ethylene oligomerization studies of chelated NˆO (imino/amino)phenol nickel(II) complexes. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2017.05.050] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Zhong L, Li G, Liang G, Gao H, Wu Q. Enhancing Thermal Stability and Living Fashion in α-Diimine–Nickel-Catalyzed (Co)polymerization of Ethylene and Polar Monomer by Increasing the Steric Bulk of Ligand Backbone. Macromolecules 2017. [DOI: 10.1021/acs.macromol.7b00121] [Citation(s) in RCA: 159] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Liu Zhong
- School
of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, China
- School
of Chemistry, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Guiliang Li
- School
of Chemistry, GD HPPC Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Guodong Liang
- School
of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Haiyang Gao
- School
of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, China
| | - Qing Wu
- School
of Materials Science and Engineering, PCFM Lab, Sun Yat-sen University, Guangzhou 510275, China
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10
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Hyperbranched macromolecules bridged salicylaldimine cobalt complexes: synthesis, characterization and ethylene oligomerization studies. CHEMICAL PAPERS 2016. [DOI: 10.1007/s11696-016-0024-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Dai S, Zhou S, Zhang W, Chen C. Systematic Investigations of Ligand Steric Effects on α-Diimine Palladium Catalyzed Olefin Polymerization and Copolymerization. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b02104] [Citation(s) in RCA: 187] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Shengyu Dai
- CAS Key Laboratory of Soft
Matter Chemistry, iChEM (Collaborative Innovation Center of Chemistry
for Energy Materials), Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Shixin Zhou
- CAS Key Laboratory of Soft
Matter Chemistry, iChEM (Collaborative Innovation Center of Chemistry
for Energy Materials), Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Wen Zhang
- CAS Key Laboratory of Soft
Matter Chemistry, iChEM (Collaborative Innovation Center of Chemistry
for Energy Materials), Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
| | - Changle Chen
- CAS Key Laboratory of Soft
Matter Chemistry, iChEM (Collaborative Innovation Center of Chemistry
for Energy Materials), Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei 230026, China
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12
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Wang J, Zhang N, Li C, Shi W, Lin Z. Synthesis and Ethylene Oligomerization of Hyperbranched Salicylaldimine Nickel Complexes. ADVANCES IN POLYMER TECHNOLOGY 2016. [DOI: 10.1002/adv.21704] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Jun Wang
- Provincial Key Laboratory of Oil & Gas Chemical Technology; College of Chemistry & Chemical Engineering; Northeast Petroleum University; Daqing Heilongjiang Province 163318 China
| | - Na Zhang
- Provincial Key Laboratory of Oil & Gas Chemical Technology; College of Chemistry & Chemical Engineering; Northeast Petroleum University; Daqing Heilongjiang Province 163318 China
| | - Cuiqin Li
- Provincial Key Laboratory of Oil & Gas Chemical Technology; College of Chemistry & Chemical Engineering; Northeast Petroleum University; Daqing Heilongjiang Province 163318 China
| | - Weiguang Shi
- Provincial Key Laboratory of Oil & Gas Chemical Technology; College of Chemistry & Chemical Engineering; Northeast Petroleum University; Daqing Heilongjiang Province 163318 China
| | - Zhiyu Lin
- Provincial Key Laboratory of Oil & Gas Chemical Technology; College of Chemistry & Chemical Engineering; Northeast Petroleum University; Daqing Heilongjiang Province 163318 China
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13
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Hu X, Dai S, Chen C. Ethylene polymerization by salicylaldimine nickel(ii) complexes containing a dibenzhydryl moiety. Dalton Trans 2016; 45:1496-503. [DOI: 10.1039/c5dt04408a] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The synthesis, characterization and ethylene polymerization properties of a series of salicylaldimine Ni(ii) complexes with a dibenzhydryl moiety are described.
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Affiliation(s)
- Xiaohui Hu
- Key Laboratory of Soft Matter Chemistry
- Chinese Academy of Sciences
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
| | - Shengyu Dai
- Key Laboratory of Soft Matter Chemistry
- Chinese Academy of Sciences
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
| | - Changle Chen
- Key Laboratory of Soft Matter Chemistry
- Chinese Academy of Sciences
- Department of Polymer Science and Engineering
- University of Science and Technology of China
- Hefei
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14
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Mu H, Pan L, Song D, Li Y. Neutral Nickel Catalysts for Olefin Homo- and Copolymerization: Relationships between Catalyst Structures and Catalytic Properties. Chem Rev 2015; 115:12091-137. [DOI: 10.1021/cr500370f] [Citation(s) in RCA: 253] [Impact Index Per Article: 28.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Hongliang Mu
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Li Pan
- School
of Material Science and Engineering, and Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin 300072, China
| | - Dongpo Song
- Department
of Polymer Science and Engineering, University of Massachusetts Amherst, 120 Governors Drive, Amherst, Massachusetts 01003, United States
| | - Yuesheng Li
- State
Key Laboratory of Polymer Physics and Chemistry, Changchun Institute
of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
- School
of Material Science and Engineering, and Collaborative Innovation
Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin 300072, China
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15
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Yang W, Yi J, Sun WH. Revisiting Benzylidenequinolinylnickel Catalysts through the Electronic Effects on Catalytic Activity by DFT Studies. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201500028] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Wenhong Yang
- Key laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Jun Yi
- Key laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
| | - Wen-Hua Sun
- Key laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Science; Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 China
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16
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Zhang YP, Li WW, Li BX, Mu HL, Li YS. Well-defined phosphino-phenolate neutral nickel(ii) catalysts for efficient (co)polymerization of norbornene and ethylene. Dalton Trans 2015; 44:7382-94. [DOI: 10.1039/c5dt00074b] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
With B(C6F5)3as a singular cocatalyst, a series of phosphino-phenolate neutral nickel catalysts were found to be highly efficient for norbornene (co)polymerization. High molecular weight (co)polymers with good solubility in common organic solvents were obtained.
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Affiliation(s)
- Yan-Ping Zhang
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Wei-Wei Li
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Bai-Xiang Li
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Hong-Liang Mu
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
| | - Yue-Sheng Li
- State Key Laboratory of Polymer Physics and Chemistry
- Changchun Institute of Applied Chemistry
- Chinese Academy of Sciences
- Changchun 130022
- China
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17
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Rhinehart JL, Mitchell NE, Long BK. Enhancing α-Diimine Catalysts for High-Temperature Ethylene Polymerization. ACS Catal 2014. [DOI: 10.1021/cs500694m] [Citation(s) in RCA: 149] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Jennifer L. Rhinehart
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Nolan E. Mitchell
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Brian K. Long
- Department
of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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18
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Hao Z, Yang N, Gao W, Xin L, Luo X, Mu Y. Nickel complexes bearing N,N,N-tridentate quinolinyl anilido–imine ligands: Synthesis, characterization and catalysis on norbornene addition polymerization. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2013.10.020] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Synthesis, Characterization and Ethylene Oligomerization Studies of Nickel Complexes Bearing Novel Bis-α-diimine Ligands. Catal Letters 2013. [DOI: 10.1007/s10562-013-1123-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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20
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Luk YYG, Foucher DA, Gossage RA. Recent advances in the homogeneous polymerisation of olefins mediated by nickel complexes. CR CHIM 2013. [DOI: 10.1016/j.crci.2012.12.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Shi QS, Hao X, Redshaw C, Sun WH. Halonickel 2,4-di-t-butyl-6-(quinolin-8-yliminomethyl)phenolates: Synthesis, characterization and ethylene reactivity. CHINESE JOURNAL OF POLYMER SCIENCE 2013. [DOI: 10.1007/s10118-013-1266-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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22
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Highly active 8-benzoxazolyl- or 8-benzothiazolyl-2-alkylquinolinylnickel(II) complexes for ethylene dimerization and vinyl polymerization of norbornene. Polyhedron 2013. [DOI: 10.1016/j.poly.2012.06.056] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Gao R, Sun WH, Redshaw C. Nickel complex pre-catalysts in ethylene polymerization: new approaches to elastomeric materials. Catal Sci Technol 2013. [DOI: 10.1039/c3cy20691b] [Citation(s) in RCA: 140] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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24
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Boudier A, Breuil PAR, Magna L, Olivier-Bourbigou H, Braunstein P. Nickel(II) complexes with imino-imidazole chelating ligands bearing pendant donor groups (SR, OR, NR2, PR2) as precatalysts in ethylene oligomerization. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.07.044] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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