title: 3,3'-Bis(4-nitro-phen-yl)-1,1'-(p-phenyl-ene)dithio-urea dimethyl sulfoxide disolvate.
abstract: The asymmetric unit of the title compound, C(22)H(16)N(6)O(6)S(2)·2C(2)H(6)OS, consists of one half-mol-ecule of the centrosymmetric thiourea derivative and one molecule of dimethyl sulfoxide (DMSO). The carbonyl group forms an intra-molecular hydrogen bond with the NH group, creating a six-membered (C-N-C-N-H⋯O) ring. Two other N-H⋯O hydro-gen bonds link one mol-ecule of the thio-urea to two mol-ecules of DMSO.
authors.affiliation: School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, People's Republic of China.
authors.forename: Wen-Kui
authors.initials: WK
authors.lastname: Dong
authors.forename: Hai-Bo
authors.initials: HB
authors.lastname: Yan
authors.forename: Lan-Qin
authors.initials: LQ
authors.lastname: Chai
authors.forename: Zhong-Wu
authors.initials: ZW
authors.lastname: Lv
authors.forename: Chun-Yu
authors.initials: CY
authors.lastname: Zhao