Question

# The type of hybridization of boron in diborane is?A- $sp$ – hybridization B- $sp^{ 3 }$ – hybridizationC- $sp^{ 2 }$ – hybridizationD- ${ sp }^{ 3 }{ d }^{ 2 }$- hybridization

-Boron has 3 electrons in valence shell; it cannot complete octet directly through covalent bonds. In the excited state of boron, it has 3 unpaired electrons with 4 orbitals which can involve in bonding. In diborane 2 hydrogen atoms in between two boron atoms are connected to both atoms through a special 3 centered 2 electron bond. In 3 centered 2 electron bonds, 2 electrons are shared in between 3 centers; those are 2 boron atoms and 1 hydrogen atom to satisfy the octet of boron. This type of bond is also considered as regular while calculating hybridization. Since each boron atom has 4 bonds so hybridization will $sp^{ 3 }$ – hybridization.