Which of the following two are isostructural ?

Options

A. `XeF_(2), IF_(2)`
B. `NH_(3), BF_(3)`
C. `CO_(3)^(2) ,SO_(3)^(2)`
D. `PCl_(5), ICl_(5)`.

Answer

A

Explanation

`XeF_(2)` is a linear molecule (Xe is `sp^(3)d^(2)` hybridised with three equitorial positions by lone pairs).
`IF_(2)` is also a linear molecule as explained below. No of electron around I = 7 + 2 + 1 (due to -ve charge) = 10
There, I is `sp^(3)d^(2)` -hybridised. There are 3 lone pairs and 2 bond pairs. Thus, its structure is similar to `XeF_(2)`.