Question

The correct IUPAC name of compound shown below is :

• A. Hexane-2,4-dioic acid
• B. 4-Ethyl-2-methylpentanedioic acid
• C. $\text{2-Ethyl-4-methylpentane-1,5-dioic acid}$
• D. None of the above

Answer 1

The correct option is C $\text{2-Ethyl-4-methylpentane-1,5-dioic acid}$

Compound has two carbon containing principal functional group, that become terminals of parent chain irrespective of chain length. Also, the two alkyl locants are equidistant from terminals, numbering is done in alphabetical order as:


Carboxylic acids ( -COOH )
Suffix: oic acid/carboxylic acid

Alkyl$(-C{H}_3,-C_2{H}_5)$ as a substituents while numbering.

Hence, the correct IUPAC name is $\text{2-Ethyl-4-methylpentane-1,5-dioic acid}$