Question

The anion ${\left[Co{\left(C_2{O}_4\right)}_3\right]}^{3-}$ involves hybridization

• A. $s{p}^3{d}^2$
• B. $d^{2}s{p}^3$
• C. $s{p}^2{d}^3$
• D. $d^{3}s{p}^2$

Answer 1

Answer: (A)

Oxidation number of $Co$ in ${\left[Co{\left(C_2{O}_4\right)}_3\right]}^{3-}=+3$

$C{o}^{3+}\left(Z=27\right)3d^6$

Since $C_2{O}_4^{2-}$ is a weak field ligand it does not force electrons to pair up

$\therefore {\left[Co{\left(C_2{O}_4\right)}_3\right]}^{3-}:$