Fe(III) and cobalt(II) coordination compounds of 5-bromo-6-methyl-2-morpholinepyrimidinium-4-amine pyridine-2,6-dicarboxylate

Abstract

New coordination compounds, (bmmpaH)[Fe(pydc)2] · (EtOH)0.8(H2O)0.2 (1), (8QH)[Fe(pydc)2] · H2O (2), (2ampyH)2[Mn(pydc)2] · H2O (3), (2ampyH)[Cr(pydc)2](2ampy)0.5 · H2O (4), [Co(H2O)5-μ-(pydc)Co(pydc)] · 2H2O (5), [Ni(pydcH)2] · H2O (6), and [Cu(pydcH)2] (7), where bmmpa, 8Q, 2ampy, pydcH2 are 5-bromo-6-methyl-2-morpholinepyrimidine-4-amine, 8-hydroxyquinoline, 2-amino-6-methylpyridine, and pyridine-2,6-dicarboxylic acid, respectively, have been synthesized and structurally characterized by elemental analyses, infrared, UV spectroscopic methods, and X-ray crystallography. Metal ions of 1 and 5 are six-coordinate with distorted octahedral geometries. Compound 1 is an anionic mononuclear complex and 5 is a binuclear compound constructed from cationic and anionic parts. The crystal data of 5 reveal that the cationic part is formed by five terminal waters and one μ-carboxylate oxygen O2 from the anionic portion and the anionic complex is built from two deprotonated (pydc)2− moieties. In the compounds, pydcH2 is tridentate by one nitrogen of pyridine ring and two oxygens of carboxylate.