The $\mathrm{C}-\mathrm{C}$ bond distance is largest in

Given data:It is given to identify among them which Compounds has has highest bond distance between C-C bond

Explanation:

$\mathrm{Bond} \mathrm{strength} \mathrm{\alpha } \frac{1}{\mathrm{Bond} \mathrm{length}}$

Butane - has all single bonds making it the compound with longest bond lengths.

Hence, correct Option is (D) ${\mathrm{C}}_2{\mathrm{H}}_6$