Question

Which of the pair of complex compounds are tetrahedral as well as diamagnetic?

• A. $\left[CoC{l}_4{]}^{-}and\right[Co(CO{)}_4{]}^{-}$
• B. $\left[Ag\right(SCN{)}_4{]}^{2-}and[NiC{l}_4{]}^{2-}$
• C. $\left[Co\right(CO{)}_4{]}^{-}and\left[Ni\right(CN{)}_4{]}^{4-}$
• D. $\left[PdC{l}_4{]}^{2-}and\right[Ni(CN{)}_4{]}^{2-}$

Answer 1

The correct option is C

$\left[Co\right(CO{)}_4{]}^{-}and\left[Ni\right(CN{)}_4{]}^{4-}$

Co in $\left[Co\right(CO{)}_4{]}^{-}$ :

Hybridization: $s{p}^3$,
${\mu }_{eff}=0$
$Niin\left[Ni\right(CN{)}_4{]}^{4-}$ :

Hybridization: $s{p}^3$,
${\mu }_{eff}=0$