Bis[2-(2-pyridylmethyleneamino)benzenesulfonato-κ3N,N′,O]cadmium(II) dihydrate

Abstract

The title complex, [Cd(Paba)2]·2H2O or [Cd(C12H9N2O3S)2]·2H2O, was synthesized by the reaction of the potassium salt of 2-(2-pyridylmethyleneamino)benzenesulfonic acid (PabaK) with CdCl2·2.5H2O in methanol. The CdII atom lies on a crystallographic twofold axis and is coordinated by four N atoms and two O atoms from two deprotonated tridentate 2-(2-pyridylmethyleneamino)benzenesulfonate ligands in a slightly distorted octahedral environment. There are extensive hydrogen bonds of the type O—H...O between the uncoordinated water molecules and the sulfonate O atoms, through which the complex forms a layered structure parallel to (001).