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Acta Cryst. (2008). E64, o2051 [ doi:10.1107/S1600536808031620 ]
Abstract: In the title compound, C14H8N2O8S2, the asymmetric unit contains two independent 2,2'-dinitro-5,5'-dithiodibenzoic acid (Dina) molecules with roughly the same conformation. In the crystal structure, strong intermolecular O-H
O hydrogen bonds link the organic molecules into a one-dimensional zigzag chain along the a axis. The dihedral angles between the two aromatic rings [109.3 (2) and 103.1 (3)°] are larger than that (88.95°) observed in a structure of the compound with a solvent water molecule [Shefter & Kalman (1969), J. Chem. Soc. D, p. 1027]. Such a difference may be explained by the occurrence of O-HO hydrogen bonds involving the water molecule in the previously reported structure.
Online 4 October 2008
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