p-Block elementsHardBloom L3

Question

The type of hybridisation of boron in diborane is

Options

A.sp
B.sp2
C.sp3
D.dsp2

Solution

Sol. Boron has three valence electrons, so it is supposed to make 3 bonds in a molecule with hybridization, sp2 as only s and two p orbitals are used in hybridization and last p orbitalis vacant. But diborane, B2​H6​ contains two electrons each, three centred bonds. Each Boron atom is in a link with four hydrogen atoms. This makes tetrahedral geometry.

Hence, each Boron atom is sp3 - hybridized.

The correct option is C.

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