Question

The HNH angle value is higher than HPH,HAsH and HSbH angles.why?

Answer 1

Hydride NH3 PH3 AsH3 SbH3
H-M-H angle 107° 92° 91° 90
The above trend in the H-M-H bond angle can be explained on the basis of the electronegativity of the central atom. Since nitrogen is highly electronegative, there is high electron density around nitrogen.