Borazine, also known as inorganic benzene, can be prepared by the...

Reaction of ammonia with diborane gives initially ${B}_{2}{H}_{6} . 2{NH}_{3}$ which is formulated as ${\left[{\text{ BH }}_{2}{\left({NH}_{3}\right)}_{2}\right]}^{+}{\left[{BH}_{4}\right]}^{-};$ further heating gives borazine, ${B}_{3}{N}_{3}{H}_{6}$ known as ''inorganic benzene'' in view of its ring structure with alternate $BH$ and $NH$ groups.

$3{B}_{2}{H}_{6} + 6{NH}_{3} \to 3{\left[{BH}_{2}{\left({NH}_{3}\right)}_{2}\right]}^{+}{\left[{BH}_{4}\right]}^{-}\overset{Heat}{\to}2{B}_{3}{N}_{3}{H}_{6} + 12{H}_{2}$