A transition metal \((\mathrm{M})\) among \(\mathrm{Mn}, \mathrm{Cr}, \mathrm{Co}\) and Fe has the highest…
A transition metal \((\mathrm{M})\) among \(\mathrm{Mn}, \mathrm{Cr}, \mathrm{Co}\) and Fe has the highest standard electrode potential \(\left(\mathrm{M}^{3+} / \mathrm{M}^{2+}\right)\). It forms a metal complex of the type \(\left[\mathrm{M}(\mathrm{CN})_6\right]^{4-}\). The number of electrons present in the \(\mathrm{e}_{\mathrm{g}}\) orbital of the complex is _________.
Solution
Co has highest standard electrode potential \(\left(\mathrm{M}^{+3} / \mathrm{M}^{+2}\right)\) among \(\mathrm{Mn}, \mathrm{Cr}, \mathrm{Co}, \mathrm{Fe}\) \(\therefore\) Complex is \(\left[\mathrm{Co}(\mathrm{CN})_6\right]^{4-}\) and its splitting is as follows. \(\therefore\) electron in \(\mathrm{e}_{\mathrm{g}}\) orbital is one.
