Synthesis, Crystal Structure, and Biological Activity of the Binuclear Complex [Pr2(C_(10)H9N2O4)2(C7H5O3)4(H2O)2]·2H2O~1

摘要

A novel binuclear praseodymium(III) complex with N-(2-propionyl)salicyloylhydrazone (C_(10)H_(10)N2O4, H3L) and p-hydroxybenzoic acid (C7H6O3, Phba) was prepared in a H2O-C2H5OH mixed solution, and the crystal structure of [Pr2(H2L)2(Phba)4(H26)2]·2H2O ( ) was determined by X-ray single crystal diffractometry. Complex crystallizes in the monoclinic system, space group P2_1/c, a = 1.1050(4), b = 1.9534(7), c = 1.2376(4) A, p = 94.955(7)°, and Z= 4. In the structure each Pr~(3)ion lies in a single capped square antiprism geometry coordinated by carboxyl O and acyl O atoms and azomethine N atom of one ligand (H2L~ form), which coordinates via the keto form, four carboxyl O atoms from two Phba, and O atoms of two water molecules. In each molecule, two tridentate ligands were coordinated by the H2L~- form, and each Pr~(3+) ion was chelated by the carboxyl group from Phba. The carboxyl groups of H2L~- and other two Phba were coordinated via μ2-bridging form and bidentate bridging form, respectively. Complex and ligands Phba and H3L were also searched for biological activity against Valsa mali by the growth rate method. The result showed that the inhibitory rate of ligands Phba and H3L is better than complex , especially Phba.