Question

Is there any change in the hybridisation of B and N atoms as a result of the following reaction? 

Answer 1

Boron atom in BF₃ is sp2 hybridized. The orbital picture of boron in the excited state can be shown as:

Nitrogen atom in NH₃ is sp3 hybridized. The orbital picture of nitrogen can be represented as:

After the reaction has occurred, an adduct F₃BNH₃ is formed as hybridization of ‘B’ changes to sp3 . However, the hybridization of ‘N’ remains intact.