【摘要】 本文讨论了C-Li的极性共价键性质,提出了应以极性参数E_T^（30）代替给电子指数DN作为衡量lewis碱与活性中心络合能力标准的论点,并论证了其偶极络合的本质。此外,用CNDO/2法计算了二烯烃单体和增长活性中心的电荷及自由价分布,提出了单体和活性中心γ碳原子配位的反应过渡态模型,阐明了聚二烯烃活性链端及其聚合物微观结构的形成机理。更多还原

【Abstract】 This paper discussed the property of the polar-covalent bond of C-Li; put forward that E_T^（30） （parameter of solvent polarity） , instead of DN （solvent donor number）,should be used as the standard measuring the complex ability between Lewis base and the C-Li, and demonstrated the nature of the dipole-dipole interaction about complex, moreover , the authors calculated the distributions of the charge and free-valent on the dienes monomers and on propagating active centers by CNDO/ 2 method; proposed a model for the reaction transition state of the monomers and the ligands of γ-atom of the active center （～CH₂— =—Li）: expounded the formation mechanism of the microstructure of polydienes and active terminals.更多还原