Figure 1
A segment of the polymeric structure of (I), showing the atom-numbering scheme. Displacement ellipsoids are drawn at the 30% probability level and H atoms have been omitted for clarity. [Symmetry codes: (i) 1 − x, 1 − y, 1 − z; (ii) 1 − x, y, − z; (iii) x, 1 − y, z − .] |