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Question
Is there any change in the hybridisation of B and N atoms as a result of the following reaction?
\[\ce{BF3 + NH3 → F3B.NH3}\]
Solution 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 F3B⋅NH3 is formed as hybridization of ‘B’ changes to sp3. However, the hybridization of ‘N’ remains intact.
Solution 2
In BF3, B atom is sp2 hybridised. In NH3, N is sp3 hybridised. After the reaction, hybridisation of B changes from sp2 to sp3.
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