`B_(2)H_(6)` is nonplanar `B_(2)H_(6)` undergo symmetrical cleavage with `PF_(3), CO` and `(C_(2)H_(5))_(3)N` `B_(2)H_(6)` undergo unsymmetrical cleavage with `NH_(3), CH_(3)NH_(2),(CH_(3))_(2)NH` `Ga_(2)Me_(6),Al_(2)Me_(6)` have two type of BONDS (`2C - 2e` bonds as well as `3C - 3e` bond)