Transition metal complexes of triphosphorus macrocycles: A new class of homogeneous olefin polymerisation catalysts.
Item Type:Journal Article
Citation:R.J. Baker and P.G. Edwards, Transition metal complexes of triphosphorus macrocycles: A new class of homogeneous olefin polymerisation catalysts., Journal of the Chemical Society, Dalton Transactions, 2002, 2960, 2965
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Some early transition metal (Ti, V, Cr) complexes of the triphosphorus macrocycle 1,5,9-triethyl-1,5,9-triphosphacyclododecane, aneP3Et3, and related derivatives aneP3R3 (R = Ph, C3H6OMe) have been examined for their reactivity towards ethene and propene. All complexes of the type aneP3Et3MCl3 display moderate catalytic activity in the homogeneous polymerisation of ethene when combined with an alkyl aluminium co-catalyst to give very high molecular weight polymers. Preliminary activation of chromium complexes with alkylating agents was also studied but these were inactive in the absence of a co-catalyst. Substitution of the P-borne alkyl group with a pendant ether function was found to switch the catalytic activity of chromium(III) complexes from polymerisation to oligomerisation. A nickel halide complex of aneP3Et3 was also found to be active in alkene polymerisation.
Author: BAKER, ROBERT
Type of material:Journal Article
Series/Report no:Journal of the Chemical Society, Dalton Transactions
Availability:Full text available