title: 6,6'-Dihydr-oxy-3,3'-dithio-dibenzoic acid.
abstract: In the title compound, C(14)H(10)O(6)S(2), the dihedral angle between the planes of the two phenyl-ene rings is 55.9 (1)°. Both hydr-oxy groups form intra-molecular hydrogen bonds; however, one of them also engages in inter-molecular hydrogen bonding. In the crystal, mol-ecules are connected into helical chains by O-H⋯O hydrogen bonds. The crystal studied was an inversion twin with a domain ratio of 0.51 (13):0.49 (13).
authors.forename: Shu-Wen
authors.initials: SW
authors.lastname: Sun
authors.forename: Fu-Lin
authors.initials: FL
authors.lastname: Zhou
authors.forename: Gao-Feng
authors.initials: GF
authors.lastname: Wang
authors.forename: Gui-Hua
authors.initials: GH
authors.lastname: Cui