Mixed donor ligands oxygen containing

Ligands with nitrogen donor sites not otherwise readily classifiable are discussed in this section. Mixed nitrogen-oxygen-containing donors (other than the Schiff bases discussed earlier) are discussed in Section II,F. 

In Table 108 significant examples of nickel(II) complexes with mixed-donor macrocycles of various denticity are reported. Apart from the nitrogen atoms, the heteroatoms in the macrocyclic rings are usually either O or S, or in a few cases P. Few examples of nickel complexes with macrocycles containing all-sulfur or all-phosphorus donor atoms have been reported to date they are also included in Table 108. In nickel(II) complexes formed by mixed-donor penta- and hexa-dentate ligands the oxygen atoms of the macrocycle are often only weakly coordinated or are not coordinated at all. 

Complexes containing mixed oxygen/nitrogen-donor ligands 464... 

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