2-Fluoro-5-(4-fluorophenyl)pyridine

In the title compound, C11H7F2N, the fluorobenzene and the 2-fluoropyridine rings are oriented at a dihedral angle of 37.93 (5)°. In the crystal, only van der Waals interactions occur.

In the title compound, C 11 H 7 F 2 N, the fluorobenzene and the 2fluoropyridine rings are oriented at a dihedral angle of 37.93 (5) . In the crystal, only van der Waals interactions occur.
The reaction mixture was refluxed for 8 h. Then 20 ml of distilled water was added. The aqueous layer was extracted three times with EtOAc (3×15 ml). The organic layer was evaporated in vacuo and title compound was obtained as a colourless solid. Yield: 0.185 g, 85%. M.p. 350-352 K. Crystallization from a saturated CHCl 3 /CH 3 OH solution gave colorless rods of (I).

Refinement
The H-atoms were positioned geometrically (C-H = 0.93 Å) and refined as riding with U iso (H) = xU eq (C), where x = 1.2 for all H-atoms. The absolute structure of the crystal used in this experiment was indeterminate.

Computing details
Data collection: APEX2 (Bruker, 2007); cell refinement: SAINT (Bruker, 2007); data reduction: SAINT (Bruker, 2007); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 for Windows (Farrugia, 1997) and PLATON (Spek, 2009); software used to prepare material for publication: WinGX (Farrugia, 1999) and PLATON (Spek, 2009  View of the title compound with displacement ellipsoids are drawn at the 50% probability level. Special details Geometry. Bond distances, angles etc. have been calculated using the rounded fractional coordinates. All su's are estimated from the variances of the (full) variance-covariance matrix. The cell e.s.d.'s are taken into account in the estimation of distances, angles and torsion angles 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 R-factors(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 F1 0.16885 (7