Acid/amide bonding for anthranilic acid derivatives: crystal structures of [W(X)Cl3(HO2CC6H4NH-2)] (X = O, NPh)

The complexes [W(X)Cl3(HO2CC6H4NH-2)] [X = O (1), NPh (2)] have been obtained by reaction of either [WOCl4] or [W(NPh)Cl4(Et2O)] with anthranilic acid {1,2-(NH2)(CO2H)C6H4}, respectively. The X-ray crystal structures reveal pseudo-octahedral metal centres, each with a mer-arrangement of chlorines and a chelating acid/amide ligand derived from anthranilic acid. The acid group of this chelate ligand is trans to either the oxo or organoimido functionality.