Figure 1
The crystal structures of the two molecules in the asymmetric unit of (Ic), showing the atom-numbering scheme; the molecules are not shown in their relative positions in the structure. Displacement ellipsoids are drawn at the 50% probability level and H atoms are shown as small spheres of arbitrary radii. Monomeric molecule 1 (left) is labelled S1, S2, N3, etc., and dimerized molecule 2 (right) is labelled S21, S22, N23, etc. |