Crystal field theory|oxidation state of elements| tetrahedral| octahedral complexes

On the basis of crystal field theory explain why Co(III) Forms paramagnetic octahedral complex with weak field ligands whereas it forms diamagnetic octahedral complex with strong field ligands.

The magnitude of crystal field stabilisation energy (CFSE of Delta_(1) ) in tetrahedral complexes is considerably less than that in the octahderal field. Because

What is the crystal field stabilization energy for high spin d^6 octahedral complex?

According to crystal filed theory , five d-orbitals of an octahedral complex split to give

For the same metal, the stabiliing energies of tetrahedral and octahedral complex are related as