Q.

Identify from the following species in which d2sp3 hybridization is shown by the central atom:                   [2024]

1 [Co(NH3)6]3+  
2 BrF5  
3 [Pt(Cl4)]2-  
4 SF6  

Ans.

(1)

For coordination number = 6, s and p block compounds always undergo sp3d2 hybridization.

[Co(NH3)6]3+

Oxidation number of Co = +3