Question

Write IUPAC names of the following compounds:
(i)\; \includegraphics[height=10pt]{dummy} (ring with –CHO and adjacent –CH$_3$)
(ii)\; (CH$_3$)$_2$CHCOCH(CH$_3$)$_2$
(iii)\; CH$_3$CH(OCH$_3$)CHO
(iv)\; HOOC–(CH$_2$)$_4$–COOH
(v)\; \includegraphics[height=10pt]{dummy} (benzene–CH$_2$COOH)

Hint:

Prioritise the highest-ranking functional group (–CHO $>$ –CO– $>$ –COOH in naming context) and choose the parent chain to include it with the lowest possible locants; then place substituents (like methyl/methoxy/phenyl) with correct numbering.

Answer 1

(i) 2-methylbenzaldehyde \;(o-methylbenzaldehyde).
(ii) 2,4-dimethylpentan-3-one.
(iii) 2-methoxypropanal.
(iv) hexane-1,6-dioic acid \;(hexanedioic acid, adipic acid).
(v) 2-phenylethanoic acid \;(phenylacetic acid).