Question

Predict the number of unpaired electrons for the following:

A tetrahedral $d^6$ ion ( high spin):

Answer 1

As high spin complex means weak field ligand i.e. pairing energy > CFSE (${\Delta }_0$) so no pairing takes place in $e_g$ .

A tetrahedral $d^6$ ion (high spin) has 4 unpaired electrons.

The electronic configuration can be written as $e_g^3{t}_{2g}^3$.