How is tetrabutyl tim prepared?

Explanation

To prepare tetrabutyl tin (Bu4Sn), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: The primary reactants for the preparation of tetrabutyl tin are tin(IV) chloride (SnCl4) and butyl lithium (BuLi).

2. **Write the Reaction**: The reaction can be represented as:
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