2-(2,4-Dichlorophenyl)-2-oxoethyl 4-methoxybenzoate

In the title compound, C16H12Cl2O4, the dihedral angle between the benzene rings is 70.11 (6)°. In the crystal, molecules are linked by C—H⋯O hydrogen bonds into a three-dimensional network. A C—H⋯π interaction is also observed.

In the title compound, C 16 H 12 Cl 2 O 4 , the dihedral angle between the benzene rings is 70.11 (6) . In the crystal, molecules are linked by C-HÁ Á ÁO hydrogen bonds into a three-dimensional network. A C-HÁ Á Á interaction is also observed.

Related literature
For related structures and background to phenacyl benzoates, see: Fun et al. (2011a,b). For reference bond lengths, see: Allen et al. (1987). For stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986 Table 1 Hydrogen-bond geometry (Å , ).

Comment
As part of our ongoing studies of phenacyl benzoates (Fun et al., 2011a,b), we hereby report the crystal structure of the title compound, (I).
The molecular structure of the title compound is shown in Fig. 1. The C1-C6 benzene ring [maximum deviation of 0.008 (1) Å at atom C4] and C10-C15 benzene ring [maximum deviation of 0.005 (1) Å at atoms C12 and C15] make a dihedral angle of 70.11 (6)° with each other. Bond lengths (Allen et al., 1987) and angles are within normal ranges and are comparable to related structures (Fun et al., 2011a,b).

Refinement
All H atoms were positioned geometrically [C-H = 0.95, 0.98 or 0.99 Å] and refined using a riding model with U iso (H) = 1.2 or 1.5U eq (C). A rotating group model was applied to the methyl group. In the final refinement, an outlier (-3 10 5) was omitted. Figures   Fig. 1. The molecular structure of the title compound with 50% probability displacement ellipsoids.

Special details
Experimental. The crystal was placed in the cold stream of an Oxford Cryosystems Cobra open-flow nitrogen cryostat (Cosier & Glazer, 1986) operating at 100.0 (1) K. 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