Give the structural formula and IUPAC names of (a) iso-butyl iodide (b) tert-amyl bromide (c) sec-butyl bromide.

Explanation

To solve the problem, we will provide the structural formulas and IUPAC names for the three compounds: iso-butyl iodide, tert-amyl bromide, and sec-butyl bromide.

### Step 1: Iso-butyl iodide
1. **Identify the structure**: Iso-butyl iodide has a branched structure. The iso-butyl group has a total of four carbon atoms, with the branching occurring at the second carbon.
2. **Draw the structural formula**:
- The structural formula can be represented as:
```
CH3
...