Question

The $C-C$ bond length is maximum in

• A. $\text{graphite}$
• B. $C_{70}$
• C. $C_{60}$
• D. $\text{diamond}$

Answer 1

The correct option is D $\text{diamond}$

The $C-C$ bond length is maximum in daimond having value 154 pm. Here, each carbon atom undergoes $s{p}^3$ hybridisation and linked to four other carbon atoms by using hybridised orbitals in tetrahedral fastion. It has a rigid three-dimensional network of carbon atoms.
$C-C$ bond length within the layers of graphite is 141.5 pm. In $C_{60},C-C$ distances between single and double bonds are 143.5 pm and 138.3 pm respectively.