Figure 1
The structure of (I), showing the atom-numbering scheme. Displacement ellipsoids are drawn at the 30% probability level and all H atoms have been omitted for clarity. [Symmetry codes: (i) x − , −y + , z + ; (ii) −x + , y − , −z + ; (iii) −x + 2, −y + 2, −z + 1.] |