Crystal structure and bioactivity of complex [Gd(C10H9N2O4)(C10H8N2O4)(H2O)3]2•phen•4H2O

A novel gadolinium(III) complex with N-(2-propionic acid)-salicyloyl hydrazone (C10H10N2O4, H3L) and 1,10-phenanthroline (C12H8N2, phen) was prepared and characterized. The crystal structure of [Gd(H2L)(HL)(H2L)3](2)(.)phen(.)4H(2)O was determined by X-ray single crystal diffractometry. The crystal complex crystallizes in the triclinic system with space group P-1. There are two 9-coordinated structure units in every complex molecule, in which Gd(HI) is coordinated by two tridentate ligands (H2L and HL forms) and three water molecules and both the structural units take a distorted monocapped square antiprism. There is a free 1,10-phenanthroline connecting with coordinated water by hydrogen bonds in the crystal. The bioactivity tests indicate that the complex is an inhibitor against three bacteria.