Chemistry - Coordination Chemistry Question with Solution | TestHub

The spin-only magnetic moment value of ${\mathrm{M}}^{\mathrm{n}+-}$ ion formed among $Ni,Zn,Mn$ and Cu that has the least enthalpy of atomisation is ________. (in nearest integer)
Here n is equal to the number of diamagnetic complexes among ${\mathrm{K}}_2\left[{\mathrm{NiCl}}_4\right],\left[\mathrm{Zn}{\left({\mathrm{H}}_2\mathrm{O}\right)}_6\right]{\mathrm{Cl}}_2$,
${\mathrm{K}}_3\left[\mathrm{Mn}(\mathrm{CN}{)}_6\right]\text{ and }\left[\mathrm{Cu}{\left({\mathrm{PPh}}_3\right)}_3\mathrm{I}\right]$