Question 14.11: Name the products of the reactions shown in Example 14.10.
Name the products of the reactions shown in Example 14.10.
\underset{\begin{matrix} Butanoic \; acid \\ (butyric \; acid) \end{matrix} }{\begin{array}{r c}\underset{||}{O} \qquad \quad \> \\ CH_3CH_2CH_2C-OH \; \\ \\ \end{array}} \xrightarrow[]{PCl_3} \begin{array}{r c}\underset{||}{O} \qquad \; \\ CH_3CH_2CH_2C-Cl \\ \\ \end{array} + inorganic \; products
The carboxylic acid that is the reactant in this reaction is butanoic acid (butyric acid). By dropping the –oic acid ending of the I.U.P.A.C. name (or the –ic acid ending of the common name) and replacing it with –oyl chloride (or –yl chloride), we can write the I.U.P.A.C. and common names of the product of this reaction. They are butanoyl chloride and butyryl chloride, respectively.
The carboxylic acid in this reaction is 2-bromobenzoic acid. By dropping the –oic acid ending of the I.U.P.A.C. name and replacing it with –oyl chloride, we can name the product of this reaction: 2-bromobenzoyl chloride. It is equally correct to name this compound o-bromobenzoyl chloride.
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