The values of the crystal field stabilization energies for a high spin d6metal ion in octahedral and tetrahedral fields, respectively, are.

d6configuration 1n octahedral complex – high spin.Configuration is  t294e12 C.F.S.E =−0.4Δ0⋅t2g electrons +0.6Δ0 eg electrons =−0.4.Δ0×4+0.6×Δ0×2=−1.6Δ0+1.2Δ0=0.4Δ0In tetrahedral complex. Configuration is eg3⋅t2g3 C.F.S.E =−0.6Δf×3+0.4×Δf×3=0.6×Δf×3+0.4×Δf×3=−1.8×Δf+1.2Δf=−0.6Δf