%0 Journal Article %T 2,2′-Bi-1,3,4-thiadiazole-5,5′-diamine tetrahydrate %A Chaveng Pakawatchai %A Saowanit Saithong %J Acta Crystallographica Section E %D 2010 %I International Union of Crystallography %R 10.1107/s160053681002996x %X In the title compound, C4H4N6S2¡¤4H2O, the complete organic molecule is generated by crystallographic twofold symmetry and the dihedral angle between the aromatic rings is 10.24 (3)¡ã. In the crystal, intermolecular N¡ªH...N, N¡ªH...O, O¡ªH...N and O¡ªH...O hydrogen bonds and aromatic ¦Ð¨C¦Ð stacking interactions [centroid¨Ccentroid separations = 3.530 (3) and 3.600 (3) ] are observed. %U http://scripts.iucr.org/cgi-bin/paper?S160053681002996X