论文部分内容阅读
卡宾(碳烯)为一类有机中间体,在有机化学中被人们所了解已经有许多年了,其中最为人熟知的就是亚甲基H_2C:。不饱和卡宾是最近发展起来的一个卡宾化学分支。除有一个二价碱原子外(卡宾的特征),在这类卡宾中还都含n个具有两个双键的碳原子,其结构可表示为其中X为不同电负性的原子或基团,n原则上可无限增大,但目前n只从0到4。n=0时为亚烷基卡宾,n=1时为亚乙烯基卡宾,n>1时为亚累积烯基卡宾。目前对它的分子构型和电子结构还
Carbenes (carbenes) are a class of organic intermediates that have been known in organic chemistry for many years, the most well known of which is methylene H 2 C :. Unsaturated carbenes are a recently developed Carbine chemical branch. In addition to a divalent base atom (carbene feature), these carbenes also contain n carbon atoms having two double bonds, the structure can be expressed as where X is a different electronegativity atoms or groups In principle, n can be infinitely increased, but at present n only from 0 to 4. Alkylene carbene at n = 0, vinylidene carbene at n = 1, and sub-cumulative alkenyl carbenes at n> 1. Its current molecular configuration and electronic structure also