Coordination Compounds Part 3

The conditions and consequence that favour t2g3eg1 configuration in a metal complex are
(i) weak field ligand, and
(ii) high spin complex
For weak field ligands, splitting energy ( ∆0 ) is lower than pairing energy ( P ). As a result distribution of electrons for 3d4 will be t2g3eg1. It results in high spin complex due to maximum number of unpaired electrons.