Ni2+ = 3d84s0 (i) [NiCl4]2–Cl– weak l gand (spectrochemical series), so no pairing possible CFSE< Pairing energy) (ii) [Ni(H2O)6]2+ H O weak field ligand. So no pairing possible. CFSE < pairing energy) (iii) [Ni(PPh3)2Cl2] alough. PPh3 has d-acceptance but presence of Cl makes complex tetrahedral