Question

$s{p}^3{d}^2$ hybridization is not present in which of the following compounds?

• A. $[Co{F}_6{]}^{-3}$
• B. $\left[Co\right(N{H}_3{)}_6{]}^{+2}$
• C. $\left[Fe\right(CN{)}_6{]}^{-4}$
• D. All of the above

Answer 1

The correct option is C $\left[Fe\right(CN{)}_6{]}^{-4}$

In $[Co{F}_6{]}^{3-},d^6$configuration, high spin complex, 4 unpaired electron so outer complex forms.
In $\left[Co\right(N{H}_3{)}_6{]}^{+2},d^7$configuration, high spin complex, 3 unpaired electron so outer complex form.
In $\left[Fe\right(CN{)}_6{]}^{4-},d^6$configuration, low spin complex with $d^{2}s{p}^3$ hybridization.