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词汇 Allyl group
分类 英语词汇 英语翻译词典
释义

Allyl group

中文百科

烯丙基 Allyl

（重定向自Allyl group）

丙烯基（Allyl）是丙烯的sp杂化的碳去掉一个氢后形成的基团。其中与双键碳相邻的碳称为烯丙位。

具有该基团的化合物通常可以进行一些特殊的反应，如丙烯重排，丙烯位氧化反应，Ene反应和Trost不对称丙烯位烷基化反应等。

用NBS可以对烯烃的丙烯位进行溴代。

英语百科

Allyl 烯丙基

（重定向自Allyl group）
Structure of the allyl group.
The free radical pathway for the first phase of the oxidative rancidification of fats.
A representative triglyceride found in linseed oil features groups with both singly and doubly allylic CH2 sites (linoleic acid and alpha-linolenic acid) and singly allylic sites (oleic acid).
MO diagram for pi-orbitals on the allyl radical. The middle MO labeled Ψ2 is singly occupied in the allyl radical. In the allyl cation Ψ2 is unoccupied and in the allyl anion it is doubly occupied. Hydrogen atoms are omitted from this picture.

An allyl group is a substituent with the structural formula H2C=CH-CH2R, where R is the rest of the molecule. It consists of a methylene bridge (-CH2-) attached to a vinyl group (-CH=CH2). The name is derived from the Latin word for garlic, Allium sativum. In 1844, Theodor Wertheim isolated an allyl derivative from garlic oil and named it "Schwefelallyl". The term allyl applies to many compounds related to H2C=CH-CH2, some of which are of practical or of everyday importance for example allyl chloride.
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