Chemistry, asked by saifullahsafeer04, 17 days ago

As both NF3 and BF3 are tetra atomic molecules but have different shape and geometry. Explain according to VSEPR theory.​

Answers

Answered by Akki2858
5

Answer:

NH3 has trigonal pyramidal geometry with bond angle 107° . This is distorted from the pure tetrahedral angle(109°) because the lone pair on nitrogen atom acquire more space than N-H single bonds.

In NF3 molecule the bond angle is 102°. There is more distortion as compared to NH3 because Fluorine is more electronegative than Hydrogen, it attract the N-F electron bond pair towards itself hence lone pair is delocalised over a larger area and the bond angle decreases.

Answered by lalitmandrai
5

Answer:

In BF3 there are three bond pairs which are shared in between two atoms resulting in the triangular planar structure while in case of NF3 there is sharing of three bond pairs plus one lone pair. Because of the lone pair sharing the structure get distorted and resulting structure is pyramidal.

Since Boron has 3 e− (s) in its valence shell, it makes all three bond pairs with one fluorine each, which accounts to sp2 hybridisation. (Making Trigonal Planar geometry.)

While Nitrogen has 5 e− (s) in its valence shell , it makes three bond pairs, one with each fluorine , but a lone pair still remains with Nitrogen making its hybridization sp3 (Making Tetrahedral Geometry) .

Hence Both have Different Geometry and Shape.

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