Question

In diborane B H bond electron go in which orbital of boron

Answer 1

sp^3 hybrid orbital

Answer 2

In diborane ($B_2H_6$), each boron atom is $sp^3$ hybridized. This hybridization involves one 2s orbital and three 2p atomic orbitals of boron, forming four equivalent $sp^3$ hybrid orbitals. Two of these $sp^3$ orbitals on each boron atom form conventional two-center two-electron (2c-2e) bonds with terminal hydrogen atoms. The remaining two $sp^3$ orbitals on each boron atom participate in the formation of three-center two-electron (3c-2e) bridging bonds with hydrogen atoms. Therefore, the electrons forming the B-H bonds (both terminal and bridging) on the boron side reside in the $sp^3$ hybrid orbitals of boron.