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 will go through each method step by step.

### Preparation of 1-Iodobutane

**(i) From 1-butanol:**

1. **Starting Material:** 1-butanol (C4H9OH)
2. **Reagent:** Potassium iodide (KI) in the presence of phosphoric acid (H3PO4).
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