Predict which of the following names are not correct ?
(i) N-Butylethanamine (ii) 1-Amino-2-ethanol (iii) Methylaniline
(iv) Propanediamine (v) 1-Phenylethanamine

Explanation

To determine which of the provided names are not correct, we will analyze each name based on IUPAC nomenclature rules for organic compounds containing nitrogen.

### Step-by-Step Solution:

1. **N-Butylethanamine**:
- The name suggests that the longest carbon chain is ethane (2 carbons) with a butyl group (4 carbons) attached to the nitrogen.
- However, the longest carbon chain should be butane (4 carbons) with an amino group (NH2) as a substituent.
- Correct name: **N-Ethylbutanamine**.
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