Diaquabis(ethylenediamine-j2N,N0)- copper(II) bis(sulfamerazinate)

R factor = 0.037; wR factor = 0.097; data-to-parameter ratio = 18.7. The asymmetric unit of the title compound, [Cu(C2H8N2)2-(H2O)2](C11H11N4O2S)2, contains one sulfamerazinate anion in a general position and one half-cation that is located on a center of inversion. The CuII cation shows a strong Jahn–Teller distortion. It is coordinated by four N atoms of two ethylenediamine ligands in the basal plane and two O atoms at much longer distances in the axial positions in a bipyramidal coordination. In the crystal, the building blocks are connected by N—H N, O—H N, N—H O and O—H O hydrogen bonding into a two-dimensional network parallel to (001). Related literature For the antibacterial activity of sulfonamides, see: Anand (1980); Kratz et al. (2000); Grave et al. (2010). For uses of sulfamerazine, see: Murphy et al. (1943); Clark et al. (1943); Earle (1944); Forbes et al. (1946). The crystal structure of sulfamerazine was reported by Acharya et al. (1982). For a related compound in which sulfathiazole acts as a deproton-ated counter-ion, see: Anacona et al. (2002)