Diaquabis(4,5-dihydro-1,2,4-triazolo-[1,5-a]pyrimidin-5-one-N-3)bis(thiocyanato-N)nickel(II)

The title compound, [Ni(NCS)(2)(C5H4N4O)(2)(H2O)(2)], crystallizes in the t riclinic space group P (1) over bar. The molecular unit contains two neutra l molecules of 4,5-dihydro-1,2,4-triazolo[1,5-a]pyrimidin-5-one (5HtpO) coo rdinated through the N atom in position 3, two thiocyanate ligands coordina ted through their N atoms and two water molecules completing an octahedral environment around the Ni-II ion, which lies on a centre of inversion. The structure is stabilized by hydrogen bonding. Distances in the coordination sphere are Ni- N3(5HtpO) 2.132 (2), Ni-O(water) 2.085 (2) and Ni- N(thiocya nato) 2.040 (2) Angstrom.