Copolymerization of ethylene with cycloolefins by titanium complexes containing tridentate [o−NSR] ligands (pages 2807–2819)
Ming-Li Gao, Xiu-Li Sun, Yue-Feng Gu, Xiao-Li Yao, Chuan-Feng Li, Ji-Ye Bai, Cong Wang, Zhi Ma, Yong Tang, Zuowei Xie, Shi-Zheng Bu and Changtao Qian
Version of Record online: 18 MAR 2008 | DOI: 10.1002/pola.22614
A family of titanium complexes of the general formula [N-(3,5-di-tert-butylsalicylidene)-2-alkylsulfanylanilinato]Ti(IV)Cl35a-f was prepared from the reaction of TiCl4 with the potassium salts of the corresponding ligands. Complexes 5a-f (except for 5c) exhibited good to high catalytic activities in ethylene copolymerization with cycloolefins in the presence of MMAO. The n-alkylthio complexes 5a, 5d-f all exhibited good ethylene copolymerization capabilities with cycloolefins, which is superior to the corresponding phenylthio complex 5g.