and/or 4-positions. Due to the optically pure nature of these single site catalysts, they effect kinetic resolution of racemic monomers: the polymeric product is enriched with the faster reacting enantiomer, while recovered monomer is enriched with the slower reacting enantiomer. The two components are easily separated. For most olefins surveyed, a partial kinetic resolution was achieved (s = k(faster)/k(slower)
一系列对映纯的 C1 对称茂
金属,[(SiMe2)2[eta5-
C5H(CHMe2)2][eta5- 2((S)-CHMeCMe3)]]ZrCl2,(S)-2,[(SiMe2)2[ eta5- (CHEt2)2][eta5- 2((S)-CHMeCMe3)]]ZrCl2、(S)-6 和 [(SiMe2)2[eta5- Cy2][eta5- 2((S)-CHMeCMe3) )]]ZrCl2、(S)-7 (Cy = 环己基)、在“上部”
环戊二烯基
配体上具有对映纯甲基新戊基取代基的二
氯化
锆,以及非对映异构纯的预催化剂,[(SiMe2)2[eta5- ((S) -CHMeCy)(CHMe2)][eta5- 3]]ZrCl2、(S)-8a 和 (S)-8b,在“低级”
环戊二烯基
配体上具有对映纯的 1-环己基乙基取代基,已合成用于手性α-烯烃的聚合。当用甲基铝氧烷活化时,这些茂
金属对于在