Write the equations for the preparation of 1-iodobutane from
(i) 1-butanol , (ii) 1-chlorobutane , (iii) but-1-ene

Explanation

To prepare 1-iodobutane from the given compounds, we can follow these steps for each compound:

### (i) Preparation of 1-iodobutane from 1-butanol

1. **Starting Compound**: 1-butanol (C4H9OH)
2. **Reaction**: Treat 1-butanol with iodine (I2) in the presence of red phosphorus (P).
3. **Equation**:
\[
...