Figure 4
The principal repeat unit of (II), with displacement ellipsoids drawn at the 50% probability level for non-H atoms. H atoms are represented as small spheres of arbitrary radii. The dashed line indicates the symmetry-independent hydrogen bond. [Symmetry codes: (i) −x + 1, −y + 1, −z + 1; (v) −x + 2, y, −z + .] |