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organic compounds
The title compound, (E)-2-acetyl-3-phenylpropenoic acid, C11H10O3, adopts a conformation incorporating a planar trans-cinnamic acid, with the α-acetyl group rotated orthogonal to it. Pairs of molecules of identical conformational chirality form carboxyl dimers across C2 axes, and the acid group displays disorder. There is a 2.64 Å ketone-Omethyl-H close contact between centrosymmetrically related dimer units.