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Acta Cryst. (2013). E69, o963
[ doi:10.1107/S1600536813013779 ]

2-(9H-Fluoren-9-yl)-4-(4-fluoroanilino)-4-oxobutanoic acid

T. Matviiuk, M. Baltas, Z. Voitenko, M. Gorichko and C. Lherbet

Abstract: In the title compound, C23H18FNO3, the tricyclic 9-fluorenyl system is approximately planar (r.m.s. deviation = 0.0279 Å). The N-C(=O) bond length is comparatively short [1.359 (3) Å], which is typical for such conjugated systems. The N atom has a planar configuration [sum of bond angles= 359.8°] due to conjugation of its lone pair with the [pi]-system of the carbonyl group. In the crystal, a three-dimensional network is formed through N-H...O and O-H...O hydrogen bonds between the amide and carboxylic acid groups and carbonyl O-atom acceptors.

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