Question

Dipole moment of pf2cl3 is zero but pcl2f3 is non zero .why?​

Answer 1

Answer:

The compounds PF2cl3 and pcl2f3 appear to have a basic trigonal bipyramid structure, F atoms in Pf2cl3

assume axile positions, while in Pf2cl3

The structure is C 2v , in which there are one equatarial and two axial F atoms.

This gives rise to stronger equatarial than axial bonds.Thus dipole moment cancles out in PCl32

, whereas it is non-zero in PCl2 F3