Figure 9 The packing of the previously known polymorph 2′ of compound 2 (Döring & Jones, 2016), viewed perpendicular to (011). Dashed lines indicate Br⋯Br contacts (thick) or hydrogen bonds (thin). The three independent Br⋯Br distances are Br1⋯Br3′ = 3.4751 (8), Br2⋯Br2′ = 3.6685 (13) and Br4⋯Br4′ = 3.6791 (12) Å.