2-(5-Fluoro-3-isopropyl-sulfanyl-1-benzofuran-2-yl)acetic acid.
The title compound, C(13)H(13)FO(3)S, was prepared by alkaline hydrolysis of ethyl 2-(5-fluoro-3-isopropyl-sulfanyl-1-benzofuran-2-yl)acetate. In the crystal, the carb-oxy groups are involved in inter-molecular O-H⋯O hydrogen bonds, which link the mol-ecules into centrosymmetric dimers. These dimers are further packed into stacks along the b axis by a slipped π-π inter-action between the furan and benzene rings of neighbouring mol-ecules [centroid-centroid distance = 3.727 (2) Å, inter-planar distance = 3.465 (2) Å and slippage = 1.373 (2) Å]. The crystal structure also exhibits a short S⋯O contact [S⋯O = 3.219 (2) Å].
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