Question

Consider IF3O2 (with I as the central atom) (6 pts).

Answer 1

A 3 isomers are possible for IF3O2 as shown in figure

B In figure 1, the point group is C2V , In figure 2, the point group is Cs, In figure 3, the point group is D3h

C  Figure 2 is depending more on repulsive effect as two of the flourine is on plane while another is going inside whereas in figure 1 only two flourine present in close vicinity and figure 3 is least repulsive dependent as the adjacent florine are transverse to each other.

Thus, Figure 2 is depending more on repulsive effect

D For non linear,

Vibrational mode  $= 3 n – 6 = 3 (6) – 6 = 12$

Thus, 12 Vibrational mode are present.