High tacticity control in organolanthanide polymerization catalysis: formation of isotactic poly(α-alkenes) with a chiral C3-symmetric thulium complex†‡
Abstract
The thulium complexes [Tm(iPr-trisox)(CH2SiMe2R)3] (R = Me 1a, Ph 1b) were synthesized from the thulium trialkyl precursors [Tm(CH2SiMe2R)3(thf)2]; reaction of 1a with two equivalents of [Ph3C][B(C6F5)4] gave a cationic complex 1c, which was found to polymerize