Question

normal modes of vibration for PF3 compound​

Answer 1

Answer:

The compound is PF3.

Now, the vibration energy of a molecule is given by the formulae  E=(v+1/2)hf where the v is vibrational quantum number and f is the frequency of the bond vibration.

We know that the PF3 compound is having trigonal pyramidal geometry.

Vibrational degrees of freedom is given by the formulae for non-linear molecules as (3N-6) where N is the degree of freedom = 3×4-6 = 6.