Question

Which of the following is coloured tetrahedral complex species?

• A. $\left[Cu\right(PP{h}_3{)}_4{]}^{+}$
• B. $\left[Zn\right(H_{2}O{)}_6{]}^{2+}$
• C. $\left[Cu\right(N{H}_3{)}_4]S{O}_4$
• D. $Mn{O}_4^{-}$

Answer 1

The correct option is D $Mn{O}_4^{-}$

$\left(A\right)\left[Cu\right(PP{h}_3{)}_4{]}^{+}\to \text{Tetrahedral}PP{h}_3\text{is a strong field ligand.}{d}^{10}\text{configuration, it is colorless}\left(B\right)\left[Zn\right(H_{2}O{)}_6{]}^{2+}\to \text{Octahedral complex}\left(C\right)\left[Cu\right(N{H}_3{)}_4]S{O}_4\to \text{Square plannar ;}\text{It is due to the transfer of one lectron from 3d orbital to higher orbital resulting}ds{p}^2\text{hybridization. So, the structure is square plannar.}(D)Mn{O}_4^{-}\to d^{3}S,\text{Tetrahedral complex; purple coloured due to LMCT}$