1. Which of the following ligands could form chelates? Indicate also the donor atom for each ligand.
Cl-, OH-, CN-, NO2-, C2O42- , H2NCH2CH2NH2 , H2NCH2CH2CH3
It coordinates through two N atoms. The remaining ligands are non-chelating. They coordinate through only one atom. Nitro group is ambidentate ligand and coordinates either through N or O but not both.