Syntheses, Structure Analyses and Thermal Stabilities of Two Schiff Base Metal Complexes

Abstract

A Schiff base ligand 1-salicylideneamino-1,3,4-triazole (L) was prepared. Two new complexes with Schiff base, [Zn(L) 2 (SCN) 2 ] (1) and [Co 2 (L) 5 (SCN) 4 ]•H 2 O (2) have been synthesized and structurally characterized. Complex 1 takes a mononuclear zinc structure and the coordination geometry of zinc atom exhibits a distorted tetrahedron, in which a zig-zag chain is constructed through hydrogen bonding interactions. A 2D supramolecular network is formed through π-π stacking between triazole planes and phenyl planes of adjacent chains, and a 3D supramolecular network is further constructed by these non-covalent π-π stacking interactions between the triazole planes of neighboring layers. Complex 2 takes a dinuclear structure with the bidentate-bridging Schiff base ligands, and cobalt site exhibits a distorted octahedron. The lattice water molecules and neutral complex 2 units form a dimer with hydrogen bonding interactions. In addition, IR and thermal gravimetric analysis are presented.