Question

What is the IUPAC name of $\left(C_6{H}_5\right)C{H}_{2}C{H}_{2}COOH$ ?

• A. 2-Phenylethanoic acid
• B. 2-Phenylpropanoic acid
• C. 3-Phenylethanoic acid
• D. 3-Phenylpropanoic acid

Answer 1

The correct option is D 3-Phenylpropanoic acid

The compound has the group $(-C{H}_{2}C{H}_{2}COOH)$ which is directly attached to a benzene ring. The preference is given to the carboxyl group and the compound is named as a carboxylic acid derivative. There are total three carbons making it propanoic acid with the benzene ring as substituent on the last carbon (C-3) as a phenyl group.