Effect of ligand substituents in olefin polymerisation by half-sandwich titanium complexes containing monoanionic iminoimidazolidide ligands–MAO catalyst systems

K Nomura, H Fukuda, S Katao, M Fujiki, HJ Kim…

Index: Nomura, Kotohiro; Fukuda, Hiroya; Katao, Shohei; Fujiki, Michiya; Kim, Hyun Joon; Kim, Dong-Hyun; Zhang, Shu Dalton Transactions, 2011 , vol. 40, # 31 p. 7842 - 7849

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Citation Number: 15

Abstract

Various half-sandwich titanium complexes containing iminoimidazolidide ligands, CpTiCl2 [1, 3-R2 (CH2N) 2CN](1a–d)[R= Ph (a), 2, 6-Me2C6H3 (b), cyclohexyl (c), tBu (d)], have been employed as the catalyst precursors for ethylene polymerisation, syndiospecific styrene polymerisation, and copolymerisation of ethylene with 1-hexene in the presence of MAO cocatalyst; 1d showed the highest catalytic activity for ethylene polymerisation ...