2-Methyl-sulfonyl-4-(trifluoro-meth-yl)benzoic acid.
In the title mol-ecule, C(9)H(7)F(3)O(4)S, the S and the methyl C atoms of the methyl-sulfonyl group deviate from the benzene ring plane by 0.185 (2) and -1.394 (3) Å, respectively. In the crystal, O-H⋯O hydrogen bonds link the mol-ecules into chains along [201]. Weak C-H⋯O inter-actions further link these chains into layers parallel to the ac plane.
Engineering Research Center of Pesticides of Heilongjiang University, Heilongjiang University, Harbin 150050,  People's Republic of China.
Lin-Shan
LS
Yao
Bo
B
We
Jin-Sheng
JS
Gao