Coordination Compounds

Identify from the following species in which d2sp3 hybridization is shown by central atom :

1. [Co(NH3)6]3+
2. SF6
3. [PtCl4]2-
4. BrF5

Answer

(1) [Co(NH3)6]3+

Solution

[figure]

(A): NH3 (strong field) pairs the 3d electrons ⇒ two inner 3d orbitals free ⇒ d2sp3 ⇒ (A) is correct

(B): SF6 uses outer 3d orbitals of S ⇒ sp3d2

(C): Pt2+ (5d8), square planar ⇒ dsp2

(D): BrF5 (5 bp + 1 lp) ⇒ sp3d2

Answer: (1)