(E)-3-(4-Fluorophenyl)-1-phenyl-2-propen-1-one

In the title compound, C15H11FO, the configuration of the keto group with respect to the olefinic double bond is s–cis. The dihedral angle between the planes of the two benzene rings is 10.61 (10)°. The crystal packing is stabilized by C—H⋯π interactions involving both benzene rings.

In the title compound, C 15 H 11 FO, the configuration of the keto group with respect to the olefinic double bond is s-cis. The dihedral angle between the planes of the two benzene rings is 10.61 (10) . The crystal packing is stabilized by C-HÁ Á Á interactions involving both benzene rings.

Related literature
For the synthesis, see: Chimenti et al. (2008). For the biological activity of chalcone derivatives, see: Dimmock et al. (1999).

Experimental
Crystal data

Experimental
The title compound was synthesized according to the method reported in the literature (Chimenti et al., 2008). Colourless single crystals suitable for X-ray diffraction were obtained by slow evaporation of a acetone solution of the compound.

Refinement
H atoms were placed in calculated positions, with C-H = 0.95 Å, and refined using a riding model, with U iso (H) = 1.2U eq (C).
In the absence of significant anomalous scattering effects, Friedel pairs were averaged. Fig. 1. The molecular structure of the title compound, showing 50% probability displacement ellipsoids and the atomic numbering.

Figures
(E)-3-(4-Fluorophenyl)-1-phenyl-2-propen-1-one  Refinement. Refinement of F 2 against ALL reflections. The weighted R-factor wR and goodness of fit S are based on F 2 , conventional R-factors R are based on F, with F set to zero for negative F 2 . The threshold expression of F 2 > σ(F 2 ) is used only for calculating Rfactors(gt) etc. and is not relevant to the choice of reflections for refinement. R-factors based on F 2 are statistically about twice as large as those based on F, and R-factors based on ALL data will be even larger.

Fractional atomic coordinates and isotropic or equivalent isotropic displacement parameters (Å 2 )
x y z U iso */U eq  (3)