4,6-Dichloro-5-(2-methoxyphenoxy)-2,2′-bipyrimidine

In the title compound, C15H10Cl2N4O2, the dichloropyrimidine and methoxyphenoxy parts are approximately perpendicular [dihedral angle = 89.9 (9)°]. The dihedral angle between the two pyrimidine rings is 36.3 (4)° In the crystal, there are no hydrogen bonds but the molecules are held together by short intermolecular C⋯N [3.206 (3) Å] contacts and C—H⋯π interactions.

In the title compound, C 15 H 10 Cl 2 N 4 O 2 , the dichloropyrimidine and methoxyphenoxy parts are approximately perpendicular [dihedral angle = 89.9 (9) ]. The dihedral angle between the two pyrimidine rings is 36.3 (4) In the crystal, there are no hydrogen bonds but the molecules are held together by short intermolecular CÁ Á ÁN [3.206 (3) Å ] contacts and C-HÁ Á Á interactions.

Experimental
Cg is the centroid of the C9-C14 ring.
The powder was added to 50ml toluene with stirring until completely dissolved. Finally, colourless crystals suitable for data collection were obtained by slow evaporation of the toluene at room temperature. Elemental analysis calculate: Elemental analysis: found: C, 51.60; H, 2.89; N, 16.05; calc. for C 15 H 10 Cl 2 N 4 O 2 : C,51.53; H, 2.93; N, 16.11.

Refinement
Data collection-2102 independent reflections but 2101 in Refinement. H atoms on C atoms were positoned geometrically and refined using a riding model with C-H = 0.96Å and U iso (H) = 1.2U eq (C).

Special details
Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.
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 > 2sigma(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.