Dichlorido{2-hydroxy­imino-N′-[1-(2-pyrid­yl)ethyl­idene]propanohydrazide-κ(3) N,N′,O}zinc(II) hemihydrate

The title compound, [ZnCl(2)(C(10)H(12)N(4)O(2))]·0.5H(2)O, was readily prepared by the reaction between ZnCl(2) and 2-hydroxy­imino-N′-[1-(2-pyrid­yl)ethyl­idene]propanohydrazide. The Zn atom has a distorted trigonal–bipyramidal geometry with two Cl atoms and one azomethine N atom in the equatorial plane and one pyridine N atom and one amide O atom in the axial positions. In the crystal structure, complex mol­ecules are connected in pairs by N—H⋯Cl hydrogen bonds, formed between the amide NH of one mol­ecule and the Cl atom of a neighboring one. Mol­ecular pairs are connected by hydrogen bonds involving the uncoordinated water mol­ecule, which lies on a twofold axis.