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Organic Chemistry
IUPAC 羧酸命名法
IUPAC 羧酸命名法
JoVE Core
Organic Chemistry
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JoVE Core Organic Chemistry
IUPAC Nomenclature of Carboxylic Acids

13.1: IUPAC 羧酸命名法

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01:16 min
May 22, 2025
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Please note that some of the translations on this page are AI generated. Click here for the English version.

Overview

羧酸的 IUPAC 名称按照下面讨论的一些规则系统地得出。

对于无环饱和一元羧酸,含有-COOH碳的最长烃链被确定为母链。 然后,母体烃名称的最后一个 -e 替换为后缀 -oic 酸。

Figure1

母碳链的编号从 –COOH 碳开始, 然后取代基的名称和位置按字母顺序列出作为母体名称的前缀。 下面给出一些示例:

Figure2

值得注意的是,所有其他官能团,如 -CHO、-CO-、-OH、-OR、-NH2 和卤素的优先级低于 -COOH 基团,因此在存在 –COOH基团时,它们被视作取代基。

不饱和羧酸以母体烯烃或炔烃命名。 多重键的位置由母体烯烃或炔烃前缀的位置表示。 顺式/反 式或E/Z 符号前缀于母体烯烃以指示双键周围的立体化学。

Figure3

无环二羧酸具有类似的命名规则,只是保留母体烃的末端e,并添加后缀-二酸(-dioic)。

Figure4

含有两个以上 –COOH 基团的化合物有时通过将其中一个基团视为取代基来命名。 例如,下面所示的羧酸将 –CH_2COOH 基团视为取代基,并在母体名称中使用前缀羧甲基-(carboxymethyl-)。

Figure5

对于具有直接连接至环烷环或芳香环的-COOH基团的环状羧酸,在母环名称中添加后缀-羧酸(-carboxylic)。 然而,与无环羧酸不同,连接至 –COOH 基团的环碳编号为碳-1。

Figure6

Transcript

羧酸是具有 –COOH 官能团的化合物。

对于一羧酸的 IUPAC 命名法,确定含有 –COOH 碳的母链,并将相应烷烃的末端 -e 替换为后缀 -oic acid。

从 –COOH 端开始对链进行编号,并确定取代基及其定位值。

最后,组装名称并指明立体化学。

在不饱和度的情况下,母体名称源自相应的烯烃或炔烃。

要命名二羧酸,请选择同时包含 –COOH 碳和从一端开始为取代基提供最低位置数的母链。在这里,保留母体碳氢化合物的末端 -e 并添加后缀 -dioic acid。

如果 –COOH 基团键合到环上,则 -carboxylic acid 在母体名称后加上后缀,编号从带有 –COOH 基团的环碳开始。

在存在多个 –COOH 基团的情况下,使用前缀 di- 或 tri-。

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