Crystal structure of potassium [4-amino-5-(benzo[d]thia­zol-2-yl)-6-(methyl­sulfan­yl)pyrimidin-2-yl](phenyl­sulfon­yl)aza­nide di­methyl­formamide monosolvate hemihydrate

The title compound, K(+)·C(18)H(14)N(5)O(2)S(3) (−)·C(3)H(7)NO·0.5H(2)O, was obtained in a reaction designed to deliver a neutral 2-pyrimidylbenzo­thia­zole. The anion is deprotonated at the sulfonamide nitro­gen. The asymmetric unit of the title compound contains two potassium cations, two anions, two mol­ecules of DMF and one of water. The anions display some conformational differences but each contains an intra­molecular N—H⋯N(benzo­thia­zole) hydrogen bond. The potassium ions both display a highly irregular six-coordination, different for each potassium ion. The anions, together with the DMF and water mol­ecules, are linked by four classical hydrogen bonds to form chains parallel to the b-axis direction.