Received 25 December 2011
aDepartment of Chemistry, Payame Noor University, PO BOX 19395-3697 Tehran, I. R. of IRAN,bX-ray Crystallography Lab., Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran,cDepartment of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran, and dDepartment of Physics, University of Sargodha, Punjab, Pakistan
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In the title molecule, C19H18Br4N2O2, the dihedral angle between the benzene rings is 73.9 (2)°. Two intramolecular N-HO hydrogen bonds make S(6) ring motifs. In the crystal, molecules are linked via C-HO interactions, forming chains propagating along the a-axis directon. A short CBr [3.401 (5) Å] contact is present in the crystal structure, which is further stabilized by a - interaction [centroid-centroid distance = 3.739 (3) Å].
Data collection: APEX2 (Bruker, 2005); cell refinement: SAINT (Bruker, 2005); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL and PLATON (Spek, 2009).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: SU2354 ).
HK and MH thank PNU for financial support, and MNT thanks the GC University of Sargodha, Pakistan, for research facilities.
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