C 20 H 23 Br 2 NO 2 , P1 (No.2), a =12.629(8) Å, b =12.653(8) Å, c =14.032(9) Å, a =71.268(6)°, b =81.172(7)°, g =76.448(6)°, V =2056.9Å 3 , Z =4,R gt (F) =0.0410,Source of material 2,3-Dibromo-4-hydroxy-5-methoxybenzaldehyde (0.310g, 1mmol) and 2,6-diisopropylaniline (0.1780g, 1mmol) were mixed in methanol (20 mL). Them ixture was stirred at room temperature for 10-12 hourst og ive ay ellow solution. Yellow block-shaped single crystals were obtained by slow evaporation of the solution containing the compound in air.
Experimental detailsAll Hatomswere positioned geometrically (C-H =0.93-0.96 Å) and were refined as riding, with U iso (H) =1 .2U eq (carrier) or 1.5U eq (methyl C).
DiscussionSchiff bases have acted as important precursors for compounds reported to possess avariety of biological activities, such as anti-properties. Meanwhile, Schiff bases have also been found to be useful ligands to form stable complexes with avariety of transition metal ions [3][4]. As an extension of our work on the structural characterization of Schiff base compounds [5][6][7], in this paper we present an ew structure of a Schiff base compound. In the title compound, all the bond lengths are within normalranges [9]. There are two independent molecules in the asymmetric unit of the title compound (see the Figure) and each molecule of the compound exists in a trans configuration with respect to the C=N double bond. The dihedral angle between the benzene ring with two bromide substituents and the benzene ring with two isopropyl substituents is 50.3(2)°. There are intramolecular O1-H1×××N2 and O3-H3×××N1 hydrogen bonds. Their symmetry code are (1-x, 1-y,1-z) and (1-x,-y,1-z) respectively. In addition, the C14-H14B-p interaction with a 2.590Å distance of C14-Cg(1) exist in the compound. These hydrogen bonds and the C14-H14B-p interaction determines the molecule packing in the structure.
