title: Polymorphic form II of 4,4'-methyl-enebis(benzene-sulfonamide).
abstract: In the title compound, C(13)H(14)N(2)O(4)S(2) (alternative names: diphenyl-methane-4,4'-disulfonamide, nirexon, CRN: 535-66-0), the two benzene rings form a dihedral angle of 70.8 (1)°. There are two sets of shorter (H⋯O < 2.1 Å) and longer (H⋯O > 2.4 Å) N-H⋯O hydrogen bonds per sulfonamide NH(2) group, which together result in hydrogen-bonded sheets parallel (102). Adjacent sheets are connected to one another by an additional N-H⋯N inter-action so that a three-dimensional network of hydrogen-bonded mol-ecules is formed. The investigated polymorph is identical with the form II previously described by Kuhnert-Brandstätter & Moser [(1981). Mikrochim. Acta, 75, 421-440].
authors.affiliation: Institute of Pharmacy, University of Innsbruck, Innrain 52, 6020 Innsbruck, Austria.
authors.forename: Thomas
authors.initials: T
authors.lastname: Gelbrich
authors.forename: Mairi F
authors.initials: MF
authors.lastname: Haddow
authors.forename: Ulrich J
authors.initials: UJ
authors.lastname: Griesser