title: A new polymorph of 2,6-bis-(trifluoro-meth-yl)benzoic acid.
abstract: The asymmetric unit of a second polymorph of the title compound, C(9)H(4)F(6)O(2), contains five independent mol-ecules, which form hydrogen-bonded O-H⋯O dimers about inversion centers. The most significant structural difference between this structure and that of the first polymorph [Tobin & Masuda (2009 ▶). Acta Cryst. E65, o1217] is the hydrogen-bonded, dimeric orientation of the carb-oxy-lic acid functionalities.
authors.affiliation: The Maritimes Centre for Green Chemistry and the Department of Chemistry, Saint Mary's University, 923 Robie Street, Halifax, NS B3H 3C3, Canada.
authors.forename: Nick A
authors.initials: NA
authors.lastname: Giffin
authors.forename: Arthur D
authors.initials: AD
authors.lastname: Hendsbee
authors.forename: Jason D
authors.initials: JD
authors.lastname: Masuda