Question

The $C-C$ bond length in ethane is:

• A. $1.54A^0$
• B. $1.34A^0$
• C. $1.39A^0$
• D. $1.2A^0$

Answer 1

The correct option is A $1.54A^0$

The carbon-carbon bond in ethane with a bond length of $1.54\mathring{A}$, is formed by overlap of one $s{p}^3$ orbital from each of the carbons, while the six carbon-hydrogen bonds are formed from overlaps between the remaining $s{p}^3$ orbitals on the two carbons and the $1s$ orbitals of hydrogen atom.