Write the structures of the following dihaloalkanes and identify them as gem or vicinal, if any:
(a) 2, 3-Dichlorobutane (6) 2,2-Dichlorobutane (c) 1,4-Dichlorobutane
(d) 1,2-Dichlorobutane (e) 1,3-Dichloro-2-methylpropane.

Explanation

To solve the problem, we will write the structures of the specified dihaloalkanes and identify whether they are geminal or vicinal.

### Step-by-Step Solution:

1. **Understanding Dihaloalkanes**:
- Dihaloalkanes contain two halogen atoms.
- Geminal dihaloalkanes have both halogen atoms on the same carbon atom.
- Vicinal dihaloalkanes have halogen atoms on adjacent carbon atoms.
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