3,3′-Dibromo-1,1′-[(propane-1,3-diyldioxy)bis(nitrilomethylidyne)]dibenzene

The molecule of the title compound, C17H16Br2N2O2, lies on a twofold axis that passes through the middle atom of the three-atom trimethylene unit. The two aromatic rings are aligned at an angle of 76.02 (4)°.

The molecule of the title compound, C 17 H 16 Br 2 N 2 O 2 , lies on a twofold axis that passes through the middle atom of the threeatom trimethylene unit. The two aromatic rings are aligned at an angle of 76.02 (4) .

Experimental
The single-crystal structure of (I) is built up by discrete C 17 H 16 Br 2 N 2 O 2 molecules, in which all bond lengths are in normal ranges. There is a crystallographic twofold rotation axis passing through the middle point (symmetry code: -x, y, 1/2 -z) of the C-C unit. The molecule adopts a trans conguration in which two benzane rings are apart from each other and form a dihedral angle of 76.02 (4) Å. The oxime, bromo groups of (I) lie in trans positions relative to the middle point in the (Duan et al., 2007). The molecule exhibits a zigzag chain array along a axis.
supplementary materials sup-2 Figures   Fig. 1. The molecule structure of (I) with atom numbering. Displacement ellipsoids for nonhydrogen atoms are drawn at the 30% probability level.
3,3'-Dibromo-1,1'-[(propane-1,3-diyldioxy)bis (nitrilomethylidyne) 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 Occ. (