`B_(2)H_(6)` in non-planar. `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` `BeH_(2)(s),Ga_(2)Me_(5),Al_(2)Me_(6)`have two TYPE of bonds (`2C-2e` bond as well as `3C-2e` bond)