Abstract

The ethylene polymerisation activity of [(Ind) 2TiMe]BPh 4 decreases with decreasing solvent polarity but is enhanced if BPh 4 − is replaced by the less basic anion [B{C 6H 3(CF 3) 2} 4] −. The reaction of [PhNHMe 2]BPh 4 with Cp* 2TiMe 2 gives [Cp* 2TiMe]BPh 4, the first isolable 14-electron titanium alkyl cation complex (Ind = indenyl, Cp* = C 5Me 5).

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