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Figure 2 A view of the crystal packing in the structure of (I), in proximity of the ab face. Hydrogen bonds are denoted by dashed lines. Only hydrogen atoms involved in the formation of hydrogen bonds are shown. The A and B labels denote centrosymmetric molecule dimers, respectively formed by the symmetry–independent molecules of the two types, present in the structure. The dimers, joined by hydrogen bonds, form chains parallel to the [1–10] direction (or to the [110] direction, on parallel planes at c/2 distance from the one shown). |