Which out of the following does not react with acetyl chloride? `(i) CH_3 NH_2 (ii) (CH_3)_2NH (iii) (CH_3)_3N`

Explanation

To determine which of the given compounds does not react with acetyl chloride, we need to analyze the nature of each compound in relation to their amine classification and the presence of replaceable hydrogen atoms.

### Step-by-Step Solution:

1. **Identify the Compounds**:
- (i) CH₃NH₂ (Methylamine) - This is a primary amine.
- (ii) (CH₃)₂NH (Dimethylamine) - This is a secondary amine.
- (iii) (CH₃)₃N (Trimethylamine) - This is a tertiary amine.
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