Figure 1
The two main packing motifs (Siemens, 1989) in (I). (a) The two-dimensional grid, as seen approximately along the [001] direction, and (b) a chain of molecules along the [110] direction, together with the atom-labelling scheme. Displacement ellipsoids are drawn at the 50% probability level and H atoms are depicted as spheres of arbitrary radii. A prime (′) denotes the symmetry operation (2 − x, 1 − y, 1 − z). [Additional symmetry code: (A) 1 − x, −y, 1 − z.] |