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醛 - Wikipedia

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[编辑] 定义

(aldehyde):有机化合物的一类,是醛基(-CHO)和烃基(或原子)连接而成的化合物。

[编辑] 结构

醛的通式为R-CHO,-CHO为醛基。

醛基是羰基(-CO-)和一个氢连接而成的基团。

[编辑] 分类

按照烃基的不同,醛可分为脂肪醛和芳香醛。 芳香醛的羰基直接连在芳香环上。

按照羰基的数目,醛可以分为一元醛和多元醛。

[编辑] 命名

简单的酮常用普通命名法

芳香醛中芳基可作为取代基来命名。

多元醛命名时,应选取含羰基尽可能多的碳链作主链,并标明peace 羰基的位置和羰基的数目。

不饱和醛的命名除羰基的编号应尽可能小以外,还要表示出不饱和键所在的位置。

许多天然醛都有俗名,例如,肉桂醛(cinnamaldehyde),茴香醛(anisaldehyde),视黄醛等(retinal)。

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