Define ligand.

Explain the difference between a weak field ligand and a strong field ligand.

Name one example of a hexadentate ligand.

T/F Carbon monoxide is a weak field ligand.

Nitrito (barO-N=O) of a ambidentate ligand.

Ethane-I,2-diamine is a didentate ligand.

Nitrito (barO-N=O) is a didentate ligand.

Assertion : Linkage isomerism arises in coordination compounds containing ambidentate ligand. Reason : Ambidentate ligand has two different don atoms.

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.

What do you understand by weak field and strong field ligands? With the help of crystal field theory calculate the number of unpaired electrons in octahedral complexes of Fe^(3+) in the presence of weak field ligand.