5-[1-(3,4-Dichloro-phen-oxy)eth-yl]-1,3,4-oxadiazole-2(3H)-thione hemihydrate

In the title compound, C(10)H(8)Cl(2)N(2)O(2)S·0.5H(2)O, the atoms in the oxadiazole ring are essentially coplanar (r.m.s. deviation 0.010 Å). The crystal structure is stabilized by inter-molecular N-H⋯O hydrogen bonds involving the water mol-ecule, which is situated on an a twofold rotation axis, and two organic mol-ecules, leading to a thione tautomer in the solid state. The C atom attached to the oxadiazole ring adopts a typical sp(3) hybridization. The dihedral angle between the mean plane of the benzene ring of the dichloro-phenyl group and the mean plane of the oxadiazole ring is 74.18 (4)°. The crystal structure is stabilized by intermolecular N-H⋯O and O-H⋯S hydrogen bonds.