The homochiral, configurationally stable, C₁-symmetric dimethyl, pentamethylcyclopentadienyl, N-(S)- or N-(R)-1-phenylethyl-caproamidinate hafnium preinitiators (S_C,S_Hf)-1 and (R_C,R_Hf)-1, respectively, can be used in combination with the borate coinitiator [PhNHMe₂][B(C₆F₅)₄] (B) and excess equivalents of ZnEt₂ for the enantioselective living coordinative chain transfer polymerization (LCCTP) of 1,5-hexadiene to provide (+)- and (−)-poly(methylene-1,3-cyclopentane) (PMCP) of tunable molecular weight and very narrow polydispersity. Use of excess I₂ to quench LCCTP provides the corresponding (+)- and (−)-iodo-terminated PMCP products. This enantioselective LCCTP process serves to establish access to readily available, practical, and scalable quantities of optically active liquid crystalline end-group-functionalized xPMCP building blocks for material science and technology discovery.

中文翻译：

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对映选择性活性配位链转移聚合：通过同手性C _1-对称的己酰胺基dinate引发剂生产光学活性的端基官能化的（+）-或（-）-聚（亚甲基-1,3-环戊烷）

均手性，构型稳定的C ₁对称的二甲基，五甲基环戊二烯基，N-（S）-或N-（R）-1-苯乙基-己酰胺din预引发剂（S _C，S _Hf）-1和（R _C，R _Hf）-1分别与硼酸盐共引发剂[PhNHMe ₂ ] [B（C ₆ F ₅）₄ ]（B）和过量当量的ZnEt _{2结合使用}1,5-己二烯的对映选择性活性配位链转移聚合（LCCTP），以提供分子量可调且非常窄的多分散性的（+）-和（-）-聚（亚甲基-1,3-环戊烷）（PMCP）。使用过量的I ₂淬灭LCCTP可提供相应的（+）-和（-）-碘末端的PMCP产物。该对映选择性LCCTP工艺用于建立对易于获得，实用和可扩展数量的光学活性液晶端基官能化xPMCP构建基块的访问，以进行材料科学和技术发现。