An unsaturated organic compound ($\text{C}_3\text{H}_6$), undergoes the following series of reactions:
$\text{C}_3\text{H}_6$ $\xrightarrow{\text{dil. H}_2\text{SO}_4}$ [B] $\xrightarrow{\text{+HCl/ZnCl}_2}$ [C] $\xrightarrow{\text{Na / dry ether}}$ [D] (Major Product)}
Identify compound [D].
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The final step is a classic Wurtz reaction, which couples alkyl radicals symmetrically. Since intermediate [C] is an isopropyl group, joining two isopropyl units together head-to-head forms a 6-carbon branched chain named 2,3-dimethylbutane.