title: [4-(Methyl-sulfon-yl)phen-yl]acetic acid.
abstract: In the crystal structure of the title compound, C(9)H(10)O(4)S, centrosymmetrically related mol-ecules are linked into dimers by inter-molecular O-H⋯O hydrogen bonds. Unconventional C-H⋯O hydrogen-bond inter-actions are also present, connecting dimers into a three-dimensional network.
authors.affiliation: Department of Chemistry, Lishui University, 323000 Lishui, Zhejiang Province, People's Republic of China.
authors.forename: Yan-Qin
authors.initials: YQ
authors.lastname: Yuan
authors.forename: Sheng-Rong
authors.initials: SR
authors.lastname: Guo
authors.forename: Li-Jin
authors.initials: LJ
authors.lastname: Wang