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metal-organic compounds
Bis(9-dihydroxymethyl-1,10-phenanthroline-2-carboxylato-N,N',O)cobalt(II) hydrate, [Co(C14H9N2O4)2].H2O, and bis(9-dihydroxymethyl-1,10-phenanthroline-2-carboxylato-N,N',O)copper(II) hydrate, [Cu(C14H9N2O4)2].H2O, are isostructural. The stable gem-diol ligands are tridentate (two N atoms and one carboxylate O atom) and form a distorted octahedron around the metal center. The total bite angle of the ligand is approximately 150°.