title: 4-Bromo-1H-pyrrole-2-carb-oxy-lic acid.
abstract: In the title compound, C(5)H(4)BrNO(2), the non-H atoms of the pyrrole ring and the Br atom are approximately coplanar, with an r.m.s. deviation from the best fit plane of 0.025 (6) Å;. The dihedral angle between the plane of the carb-oxy group and this plane is 14.1 (2)°. In the crystal, O-H⋯O hydrogen bonds link the mol-ecules together, forming corrugated sheets parallel to the bc plane.
authors.affiliation: Department of Chemistry, Jinan University, Guangzhou, Guangdong 510632,  People's Republic of China.
authors.forename: Le
authors.initials: L
authors.lastname: Zheng
authors.forename: Fang
authors.initials: F
authors.lastname: Hu
authors.forename: Xiang Chao
authors.initials: XC
authors.lastname: Zeng
authors.forename: Kai Ping
authors.initials: KP
authors.lastname: Li