\(\begin{array}{l}
{C_5}{H_{12}} \to {C_5}{H_{10}} + {H_2}\\
{C_5}{H_{10}} + {H_2} \to {C_5}{H_{12}}\\
{C_5}{H_{12}} \to {C_5}{H_8} + 2{H_2}\\
{C_5}{H_8} + 2{H_2} \to {C_5}{H_{12}}\\
{C_5}{H_{10}} \to {C_5}{H_8} + {H_2}\\
{C_5}{H_8} + {H_2} \to {C_5}{H_{10}}
\end{array}\)