title: Monoclinic polymorph of 2-(pyrimidin-2-ylsulfan-yl)acetic acid.
abstract: The title compound, C(6)H(6)N(2)O(2)S, is a new polymorphic form of 2-(pyrimidin-2-ylsulfan-yl)acetic acid. Unlike the previous orthorhombic polymorph [Pan & Chen (2009 ▶) Acta Cryst. E65, o652], the mol-ecules are not planar: the aromatic ring makes an angle of 80.67 (17)° with the carboxyl plane. In the crystal, mol-ecules are linked by O-H⋯N hydrogen bonds into chains along [02].
authors.affiliation: CEMDRX, Physics Department, University of Coimbra, P-3004-516 Coimbra, Portugal.
authors.forename: Manuela
authors.initials: M
authors.lastname: Ramos Silva
authors.forename: Pedro S
authors.initials: PS
authors.lastname: Pereira Silva
authors.forename: Consuelo
authors.initials: C
authors.lastname: Yuste
authors.forename: José A
authors.initials: JA
authors.lastname: Paixão