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how can we find bond angle? Is there any forluma?pls. Explain with example.

how can we find bond angle? Is there any forluma?pls. Explain with example.

Grade:12

2 Answers

sikandar sharma
29 Points
10 years ago

bond angle of a compound can be found by gathering the information about its hybridisation?

for example: for NH3, its hybridisation is sp3,so bond angle is 104.50.

Ashwin Sinha
520 Points
10 years ago

Dear Vaishal,

 One can never get correct bond angle by any formula always, bcoz of lone pair repulsions or due to lack of electrons, but here is a hyb. table, which would help you.

VSEPR table

The bond angles in the table below are ideal angles from the simple VSEPR theory, followed by the actual angle for the example given in the following column where this differs. For many cases, such as trigonal pyramidal and bent, the actual angle for the example differs from the ideal angle, but all examples differ by different amounts. For example, the angle in H2S (92°) differs from the tetrahedral angle by much more than the angle for H2O (104.5°) does.

Bonding electron pairs↓Lone pairs↓Electron domains↓Shape↓Ideal bond angle (example's bond angle)↓Example↓Image↓
2 0 2 linear 180° CO2 Linear-3D-balls.png
3 0 3 trigonal planar 120° BF3 Trigonal-3D-balls.png
2 1 3 bent 120° (119°) SO2 Bent-3D-balls.png
4 0 4 tetrahedral 109.5° CH4 AX4E0-3D-balls.png
3 1 4 trigonal pyramidal 107.5° NH3 AX3E1-3D-balls.png
2 2 4 angular 104.5° H2O Bent-3D-balls.png
5 0 5 trigonal bipyramidal 90°, 120° PCl5 Trigonal-bipyramidal-3D-balls.png
4 1 5 seesaw 180°, 120°, 90° (173.1°, 101.6°) SF4 AX4E1-3D-balls.png
3 2 5 T-shaped 90°, 180° (87.5°, < 180°) ClF3 AX3E2-3D-balls.png
2 3 5 linear 180° XeF2 AX2E3-3D-balls.png
6 0 6 octahedral 90°, 180° SF6 AX6E0-3D-balls.png
5 1 6 square pyramidal 90° (84.8°), 180° BrF5 AX5E1-3D-balls.png
4 2 6 square planar 90° 180° XeF4 Square-planar-3D-balls.png
7 0 7 pentagonal bipyramidal 90°, 72° IF7 Pentagonal-bipyramidal-3D-balls.png

 

 

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