Synthesis, spectroscopic properties, and structures of copper(II) and manganese(II) complexes of pyridine-2,6-dicarboxylate and 1,10-phenanthroline

A binuclear copper(II) complex [Cu(PDC)(phen)]2 · 2CH3OH · 1.5H2O (1) and a seven-coordinate manganese(II) complex [Mn(PDC)(phen)2] · CH3OH (2) (PDC = pyridine-2,6-dicarboxylate, phen = 1,10-phenanthroline) have been synthesized hydrothermally and characterized by elemental analyses, spectroscopic studies (IR and UV), and single-crystal X-ray diffraction. In 1, the binuclear copper(II) compound consists of two kinds of Cu(II) centers with five- and six-coordination environments by PDC and phen. The two Cu(II) ions are bridged by one PDC. In 2, Mn(II) is seven-coordinate by two phen and one PDC.