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Indenylnickel(II) Halides for the Polymerization of Styrene in the Presence of NaBPh 4 /PPh 3
Author(s) -
Sun HongMei,
Li WanFei,
Hu DongMei,
Shao Qing,
Shen Qi
Publication year - 2006
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200690078
Subject(s) - chemistry , styrene , polymerization , substituent , polymer chemistry , halide , halogen , polystyrene , chain transfer , copolymer , inorganic chemistry , medicinal chemistry , polymer , radical polymerization , organic chemistry , alkyl
The catalytic activity of a series of indenylnickel(II) halides: (1‐R‐Ind)Ni(PPh 3 )X (R=ethyl, cyclopentyl and benzyl, while X=Cl, Br and I), towards styrene polymerization was studied in the presence of NaBPh 4 and PPh 3 . The catalytic property of these halides was related to the substituent group on the indenyl ligand and the halogen atom bonded to the metal atom. Among them, the (1‐Et‐Ind)Ni(PPh 3 )Cl/NaBPh 4 /PPh 3 system showed the highest activity for the polymerization of styrene, and the polystyrene obtained was a syndio‐rich ( rr triad) atactic polymer with M n values in the range of 10 3 –10 4 . The mechanism of the styrene polymerization initiated by the (1‐Et‐Ind)Ni(PPh 3 )Cl/NaBPh 4 /PPh 3 system was studied.