JEE Main2018ChemistryChemical Bonding and Molecular StructureActual
Identify the pair in which the geometry of the species is T-shaped and square-pyramidal, respectively,
Options
- AICl 2 - and ICl 5 .
- BIO 3 - and   IO 2 F 2 - .
- CClF 3 and IO 4 - .
- DXeOF 2 and XeOF 4 .
Correct answer
D. XeOF 2 and XeOF 4 .
Step-by-step solution
In XeOF 2 , the central atom has 3 bond pairs and 2 lone pairs. Hence, the electrons will enter a trigonal bipyramidal geometry. The 2 lone pairs will take up equatorial positions giving the molecule a T-shape. Xe in XeOF 4 has 5 bond pairs and 1 lone pair. The electrons will take up square bipyramidal geometry, but due to a lone pair, the shape of the molecule will be square pyramidal.