Chemistry - Nomenclature Question with Solution | TestHub

Question Explanation:  

Name the compound shown (contains ketone and alkyl groups).

Concept:

This is based on IUPAC nomenclature of compounds containing functional groups.

Solution:  

The principal functional group is ketone (C=O), so its carbon must get the lowest position in the numbering of the principal chain. 

Next, we choose the chain that contains the maximum number of unsaturation followed by maximum carbon and then maximum substituents groups

Hence, the principal carbon chain has 4 carbon atoms.  

IUPAC name: 3-Methylbutan-2-one