Hexaborane(12)

Hexaborane(12) is an inorganic compound with the formula B6H12. It is an obscure member of the boranes. It is a colorless liquid that, like most boron hydrides, is readily hydrolyzed and flammable.

The molecular structure conforms to C2 symmetry group. With the formula BnHn+6, it is classified as an arachno-cluster. As such the boron positions match six of the boron positions in the closo-B8H$2− 8$.

Preparation
It is typically prepared by the cluster expansion method from B5H$− 8$, the conjugate base of pentaborane(9):
 * LiB5H8 +  1/2 B2H6   →   LiB6H11
 * LiB6H11 + HCl   →   B6H12  +  LiCl