Which the following will not give yellow colouration with NaOI?

Options

A.
B.
C. `CH_3-overset(O)overset(||)C-underset(CH_3)underset(|)overset(CH_3)overset(|)C-CH_3`
D.

Answer

D

Explanation

NaOI is the reagent formed during iodoform test, so, it will produce yellow colouration only with ketones which contains `CH_3CO`-group.
NaOI also works as mild oxidizing agent that converts methylene alcohols into methylene carbonyl (acetyl) groups, then NaOI converts them into iodoform. So compounds (A), (B) and (C) will produce yellow colour. Compound (D) cannot produce yellow colour because it lacks methylene carbonyl group .