A mixture of Boron trichloride and hydrogen is subjected to silent...

When a mixture of ${BCl}_{3}$ and ${H}_{2}$ is subjected to silent electric discharge, diborane and $HCl$ are formed. Diborane reacts with ${NH}_{3}$ at $200 ° C$ to give Borazine (inorganic benzene).

$2{BCl}_{3} + 6{H}_{2}\mathop{→}_{discharge}^{Electric}\mathop{{B}_{2}{H}_{6}}_{x} + 6HCl$

$\mathop{3{B}_{2}{H}_{6}}_{1} + \mathop{6{NH}_{3}}_{2}\overset{200 ° C}{⟶}\mathop{2{B}_{3}{N}_{3}{H}_{6}}_{Borazine ( y )} + 12{H}_{2}$