Synthesis and crystal structure of aqua(dimethylbithiazole)oxydiacetatonickel(II) trihydrate

The title complex, Ni(C8H8N2S2)(C4H4O5)(H2O) · 3H2O, was synthesized and its crystal structure determined by X-ray diffraction methods. Two crystallographically independent complex molecules are present in the asymmetric unit. They have similar octahedral coordination geometries, formed by a bidentate dimethylbithiazole (dMbt), a tridentate oxydiacetate dianion (ODA) and a coordinated water molecule. The tridentate ODA ligand displays an unusual facial configuration. A partially overlapped arrangement of nearly parallel dMbt ligands of neighbouring molecules is observed in the crystal, the shortest centroid distance of 3.555(3) Å between thiazole rings suggesting the existence of aromatic π–π stacking.