[Co(ox)3]3– ; 3d6 configuration, all electrons are paired and hybridisation is d2sp3–diamagnetic with μ = 0.

[Cr(NH3)6]3+ ; 3d3 configuration, all electrons are unpaired and paramagnetic with μ (approximately)3.78 B.M and hybridisaion is d2sp3 (NH3 strong field ligand).

[Fe(H2O)5NO]2+ ; 3d6 4s1 configuration, hybridisation is sp3d2 and is paramagnetic with three unpaired electrons ( μ ≈ 3.78 B.M.)

[Zn(NH3)6]2+ ; 3d10 configuration, all electrons are paired so diamagnetic with μ = 0 and hybridisation is sp3d2.