Diaquabis[5-(pyrazin-2-yl)-5H-tetrazolato-κ2N,N′]copper(II) monohydrate

Abstract

The CuII atom in the title compound, [Cu(C5H3N6)2(H2O)2]·H2O, is chelated by two pyrazinyltetra­zolate ligands and, in addition, coordinated by two water mol­ecules in a tetra­gonally elongated octa­hedral geometry [Cu—N = 1.990 (2) and 2.056 (2) A, and Cu—O = 2.445 (2) A]. The CuII atom lies on a center of inversion. In the crystal structure, mol­ecules are linked by O—H⋯O and O—H⋯N hydrogen bonds into a three-dimensional network. The free water molecule is disordered about a twofold axis.