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organic compounds
The title compound, 2-(1-phenyl-1,3-butadien-2-yl)benzoic acid, C6H5CH=C(C6H4COOH)CH=CH2 (or C17H14O2), has been obtained as the major product from an indium-mediated coupling of benzaldehyde with methyl o-(3-bromo1-propynyl)benzoate. The compound crystallizes as centrosymmetric hydrogen-bonded dimers. The diene portion is in the s-trans conformation, with the aromatic groups cis to one another.