Bis[N-aminocarbonyl-N′-(3-pyridylmethylene-κN)hydrazine]diaquabis(thiocyanato-κN)zinc(II)

Abstract

The Zn atom of the title complex, [Zn(NCS)2(C7H8N4O)2(H2O)2] or [Zn(SCN)2(H-Pysc)2(H2O)2] [H-Pysc = N-aminocarbonyl-N′-(3-pyridylmethylene)hydrazine], derived from the condensation of pyridine-3-carbaldehyde and semicarbazone, is located at a crystallographic centre of inversion and is octahedrally coordinated by two thiocyanate anions, two aqua molecules and two molecules of the neutral Schiff base ligand H-Pysc. The Schiff base molecules act as monodentate ligands coordinating the metal through the pyridyl N atom, whereas the amide O and imine N atoms remain uncoordinated. The crystal packing is stabilized by intermolecular hydrogen bonds involving H-Pysc ligands, thiocyanate anions and water molecules.