Hydrothermal synthesis and structure characterization of compound Zn(Hpydc)2(H2O) (pydc=pyridine-2,5-dicarboxylate)

The hydrothermal reaction of. ZnO, H3PO4(85%), (H2NCH2CH2)(2)NH and H(2)pydc results in the formation of a discrete mononuclear zinc(II) complex Zn(Hpydc)(2)(H2O). It crystallizes in monoclinic space group C2/c with a = 17.9947(8), b = 7.1875(3), c = 12.5895(4) Angstrom, 8 = 110.802(2)degrees, V = 1522.14(10) Angstrom (3), Z = 4, M-r = 415.61, (C14H10N2O9Zn), Dc = 1.814 g/cm(3), mu = 16.71 cm(-1), F(000) = 840, R = 0.0505, wR = 0.1144. Each zinc(II) is coordinated to two nitrogen and three oxygen atoms of which two nitrogen and two oxygen atoms are from two pydc ligands, and one oxygen atom from the coordinated water molecule to form an irregular polyhedral geometry. The complex is linked further into a three-dimensional structure through the weak interactions of hydrogen bonds between the two oxygen atoms. IR spectrum of the complex is also discussed.