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Asked by Prasad

May 28, 2014

Shape of NF3 is pyramidal while the shape of BF3 is triangular planar

Why the shape of NF3 is pyramidal while the shape of BF3 is triangular planar?

Answers(2)

Answer

SRAVANKUMAR Gudipudi

Member since

In NF3 -The central atom Nitrogen undergoes SP3 hybridization and there is one lone pair on Nitrogen atom. There exists repulsion force between lone pair and bond pair of electrons in NF3 molecule because of which it acquires pyramidal shape.
Where as in BF3 the central atom Boron undergoes SP2 hybridization and has no lone pair of electrons. Thus three Fluorine atoms will occupy three corners of triangular planar structure. 

Satyanarayana Prasad

Member since Apr 24, 2013

Ans: In NF3 -The central atom Nitrogen undergoes SP3 hybridization and there is one lone pair on Nitrogen atom. There exists repulsion force between lone pair and bond pair of electrons in NF3 molecule because of which it acquires pyramidal shape.

Where as in BF3 the central atom Boron undergoes SP2 hybridization and has no lone pair of electrons. Thus three Fluorine atoms will occupy three corners of triangular planar structure. 

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