Hexaborododecahydride, B₆H₁₂

Hexaborododecahydride or borohexylene, B₆H₁₂, is a colourless liquid, the vapour density of which is in agreement with the formula given. The vapour pressures at various temperatures are as follows: -

Temp. ° C	-40°	0°	10°	24°	100°
Vap. press, (mm.)	1	10	15	25	760

The hydride has a highly disagreeable odour, and ignites spontaneously in the air. It is decomposed by water and alkalies more readily than the preceding hydride: -

B₆H₁₂ + 18H₂O = 6H₃BO₃ + 15H₂
B₆H₁₂ + 6NaOH + 6H₂O = 6NaBO₂ + 15H₂