Indenylnickel(II) Halides for the Polymerization of Styrene in the Presence of NaBPh4/PPh3
Identifieur interne : 006104 ( Main/Merge ); précédent : 006103; suivant : 006105Indenylnickel(II) Halides for the Polymerization of Styrene in the Presence of NaBPh4/PPh3
Auteurs : Hong Ei Sun [République populaire de Chine] ; Wan Ei Li [République populaire de Chine] ; Dong Ei Hu [République populaire de Chine] ; Qing Shao [République populaire de Chine] ; Qi Shen [République populaire de Chine]Source :
- Chinese Journal of Chemistry [ 1001-604X ] ; 2006-03.
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Abstract
The catalytic activity of a series of indenylnickel(II) halides: (1‐R‐Ind)Ni(PPh3)X (R=ethyl, cyclopentyl and benzyl, while X=Cl, Br and I), towards styrene polymerization was studied in the presence of NaBPh4 and PPh3. 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(PPh3)Cl/NaBPh4/PPh3 system showed the highest activity for the polymerization of styrene, and the polystyrene obtained was a syndio‐rich (rr triad) atactic polymer with Mn values in the range of 103–104. The mechanism of the styrene polymerization initiated by the (1‐Et‐Ind)Ni(PPh3)Cl/NaBPh4/PPh3 system was studied.
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DOI: 10.1002/cjoc.200690078
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<term>indenyl</term>
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<front><div type="abstract" xml:lang="en">The catalytic activity of a series of indenylnickel(II) halides: (1‐R‐Ind)Ni(PPh3)X (R=ethyl, cyclopentyl and benzyl, while X=Cl, Br and I), towards styrene polymerization was studied in the presence of NaBPh4 and PPh3. 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(PPh3)Cl/NaBPh4/PPh3 system showed the highest activity for the polymerization of styrene, and the polystyrene obtained was a syndio‐rich (rr triad) atactic polymer with Mn values in the range of 103–104. The mechanism of the styrene polymerization initiated by the (1‐Et‐Ind)Ni(PPh3)Cl/NaBPh4/PPh3 system was studied.</div>
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