Figure 3
Each molecule in the ribbon described in Fig. 2 is C—H⋯O hydrogen-bonded to a neighbouring ribbon related by a b glide. In addition, molecules in ribbons related by translation along the b axis are involved in a C—H⋯Br interaction (see Table 1 for details). Symmetry codes for the various molecules (and independent unit making up each molecule) are as follows: (i) x, y, z; (ii) −x, y, −z + ; (iii) x, y + 1, z; (iv) −x, y + 1, −z + ; (v) −x + , y − , z; (vi) x + , y − , −z + ; (vii) −x + , y + , z; (viii) x + , y + , −z + . |