Figure 5
(a) Fragment of the structure of II, with columns of the molecules down the a-axis, held by π–π (represented by light blue lines) and CH⋯π bonds. Short Br1⋯O3vi contacts [3.3066 (19) Å] are also shown. (b) π–π and CH⋯O interactions between the columns. [Symmetry codes: (i) x + 1, −y + 1, −z; (iii) x + 2, −y + 1, −z + 1; (v) x + 1, −y + 1, −z + 1; (vi) x + 1, y, z; (vii) x, y, z − 1.] |