Synthesis and characterization of zinc(II) oxydiacetate (oda) complexes. Crystal structures of [{Zn(oda)·0.3H2O}n], [Zn(oda)(bipy)(H2O)]·2.5H2O and [Zn(oda)(phen)(H2O)]·1.5H2O (bipy = 2,2′-bipyridine, phen = 1,10-phenanthroline)

Abstract

Three novel zinc(II) oxydiacetate (oda) compounds [{Zn(oda)·0.3H₂O}_n]1, [Zn(oda)(bipy)(H₂O)]·2.5H₂ O 2(bipy = 2,2′-bipyridine) and [Zn(oda)(phen)(H₂O)]·1.5H₂O 3(phen = 1,10-phenanthroline) have been synthesized and their structures determined by single-crystal X-ray diffraction methods. Compound 1 consists of polymeric sheets formed by ZnO₅ units bridged by carboxylate groups in anti-syn conformation along the z axis; 2 and 3 are mononuclear with the zinc atoms in distorted octahedral ZnN₂O₄ co-ordination geometries. Thermal decomposition of the compounds under an oxygen atmosphere affords ZnO at ca. 500 °C.