Which of the following are iso-electronic as well as iso-structural ?
`NO_(3)^(-),CO_(3)^(2-),ClO_(3)^(-),SO_(3)`

Options

A. `NO_(3)^(Theta),CO_(3)^(2-)`
B. `SO_(3), NO_(3)^(Theta)`
C. `CIO_(3)^(Theta), CO_(3)^(2-)`
D. `CO_(3)^(2-), SO_(3)`

Answer

A

Explanation

Number of electrons in the following species are
`NO(6)^(Theta) rArr 17 + 8xx 3 + 1 = 32 e^(-')s`
`CO_(3)^(2-) rArr 6 + 8 xx 3 +2 = 32 e^(-')s`
`CIO_(3)^(Theta) rArr 17 + 8 xx 3 +1 = 42 e^(-')s`
`SO_(3) rArr 6 +8 xx 3 = 40 e^(-')s`
Therefore, isoelectronic species are `NO_(3)^(Theta)` and `CO_(3)^(2-)` Hybridisation of the following species are
`NO_(3)^(Theta) rArr (1)/(2) (5 +0 +1) =3 =sp^(2)`
`CO_(3)^(2-) rArr (1)/(2) (4 +0+2) = 3= sp^(2)`
`CIO_(3)^(Theta) rArr (1)/(2) (7 +0 +1) = 4 =sp^(3)`
`SO_(3) rArr (1)/(2) (6 +0) =sp^(2)`
Thus species which are both isostructural in `H_(2)S_(2)O_(8)` as its name also suggests peroxide linkage .