Polymorphism in 2-(4-hydroxy-2,6-dimethylanilino)-5,6-dihydro-4H-1,3-thiazin-3-ium chloride

Julio Gutierrez, Rodney Eisenberg, Gabrielle Herrensmith, Thomas Tobin, Tonglei Li, and Sihui Long
Acta Crystallographica C, 66:o593–o595, 2010

Abstract (from publisher): Details of the structures of two conformational polymorphs of the title compound, C12H17N2OS+·Cl, are reported. In form (I), the two N—H groups of the cation are in a trans conformation, while in form (II) (space group P21/c), they are in a cis arrangement. This results in different packing and hydrogen-bond arrangements in the two forms, both of which have extended chains lying along the adirection. In form (I), these chains are composed of centrosymmetric R42(18) (N—H…Cl and O—H…Cl) hydrogen-bonded rings andR22(18) (N—H…O) hydrogen-bonded rings. In form (II), the chains are formed by centrosymmetric R42(18) (N—H…Cl and O—H…Cl) hydrogen-bonded rings and by R42(12) (N—H…Cl) hydrogen-bonded rings.

Article link