Figure 1
The structure of the asymmetric unit of (I), expanded to show relevant symmetry-related atoms, with the atomic numbering scheme. Displacement ellipsoids are drawn at the 50% probability level and H atoms are shown as small spheres of arbitrary radii. Atoms labelled with the suffixes A–E are at the symmetry postitions (−x, 1 − y, −z), ( − x, y − , − z), ( − x, + y, − z), ( + x, − y, + z) and (x − , − y, z − ), respectively. |