@article {Wölper:2011:0108-2701:o249, title = "Polysulfonylamines. CXCI. The `almost' polymorphs", journal = "Acta Crystallographica Section C", parent_itemid = "infobike://bsc/ayc", publishercode ="bp", year = "2011", volume = "67", number = "7", publication date ="2011-07-15T00:00:00", pages = "o249-o254", itemtype = "ARTICLE", issn = "0108-2701", eissn = "2053-2296", url = "https://www.ingentaconnect.com/content/bsc/ayc/2011/00000067/00000007/art00021", doi = "doi:10.1107/S0108270111020816", author = "W{\"o}lper, Christoph and Anwar, Naveed and Gulzar, Naeem and Jones, Peter G. and Blaschette, Armand", abstract = "The title compound, C6H15N2 +\textperiodcenteredC2H6NO4S2 , crystallizes as a 0.11hydrate, (I), in the space group C2; the asymmetric unit consists of two cations (one of each enantiomer), one anion on a general position, two half anions, each with the N atom on a twofold axis, and approximately one fifth of a water molecule. The general anion departs significantly from the usual conformation: it lacks one of the typical `W'shaped sequence of OSNSO atoms. The compound also crystallizes in the solventfree form, (II), in the space group P21/c, with one formula unit in the asymmetric unit. Both compounds form ribbons of hydrogenbonded cation dimers parallel to the b axis. In (I), there are two independent ribbons of opposite chirality, each involving one anion on a special position, and these ribbons are connected by hydrogen bonds to the anion on a general position, resulting in a layer structure parallel to (100). In (II), the chains are connected by hydrogen bonds, and again a layer structure parallel to (100) results.", }