Answer
The IUPAC name of the compound is $sodium \hspace1mm 3−methylbutanoate$ .The common name of the compound is $sodium \hspace1mm β−methylbutyrate$
Work Step by Step
The acid has 4 carbon atoms in its longest carbon chain containing the carboxylic functional group. It has a methyl substituent at position 3. So, the IUPAC name of the compound is $sodium \hspace1mm 3−methylbutanoate$ .The common name of the compound is $sodium \hspace1mm β−methylbutyrate$
