Question

difference between NH3,NH4+,NH2- according to vesper

Answer 1

In All of the Molecules Nitrogen has sp3 hybridization , the only difference is in the angle of HNH bond which is different .

In NH3 - There is 1 lone pair and hence due to Lp Bp repulsion the angle decreases a little .

NH4+ Has no lone pair

NH2- has two lone pair and therefore the decrease in bond angle is maximum .

Also All of the Have different net dipole moments .

Descending Order of Dipole Moments : NH2- >NH3>NH4+

Descending order of Bond angle : NH4+ >NH3> NH2-

Note : For Every Lone pair bond angle approximately decreases by 2.5°