Reactions of the dirhenium(II) complex Re (sub)2 Cl (sub)4 (mu-dppm) (sub)2 with pyridinecarboxylic acids. Examples of bidentate O,O versus N,O coordination and tridentate O,N,O coordination and structural isomers that contain the pyridine-2,6-dicarboxylate ligand

Research has been conducted on pyridine-2-dicarboxylic-, pyridine-2,6-dicarboxylic- and pyridine-2,4-dicarboxylic acids and their salts. The authors demonstrate that these compounds react with triply bonded dirhenium(II) complex is respond to ethanol, and produce unsymmetrical substitution products where N,O represents a chelating pyridine-2-carboxylate ligand.