Based on crystal field theory explain

Based on crystal field theory explain why Co(III) forms a paramagnetic octahedral complex with weak field ligands whereas it forms a diamagnetic octahedral complex with strong field ligands.


The electronic configuration will be t42g e2g. It has 4 unpaired electron and paramagnetic. With weal ligand Δ0 < p. The configuration with strong field ligand will be

t62g e0g. the Δ0 > p and there won’t be any unpaired electron therefore diamagnetic.


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