Abstract
Reaction of Ti(CH 2Ph) 4 with B(C 6F 5) 3 results in the formation of [Ti(CH 2Ph) 3][(η 6-PhCH 2)B(C 6F 5) 3], while reactions with [Ph 3C][B(C 6F 5) 4] give either [Ti(CH 2Ph) 3][B(C 6F 5) 4] or [(CH 2Ph) 3Ti-μ-CH 2PhTi(CH 2Ph) 3][B(C 6F 5) 4], depending on the Ti(CH 2Ph) 4:[Ph 3C] ratio; NMR evidence is presented that all of these compounds, including Ti(CH 2Ph) 4, exhibit multihapto Ti–CH 2Ph bonding. The Ti(CH 2Ph) 4/B(C 6F 5) 3 and Ti(CH 2Ph) 4/[Ph 3C][B(C 6F 5) 4] systems are assessed for their abilities to induce polymerization of ethylene, 1-hexene, isobutylene and ethyl vinylether, and the Ti(CH 2Ph) 4/[Ph 3C][B(C 6F 5) 4] system is found to be able to function as both a Ziegler–Natta catalyst and a carbocationic initiator.
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