Figure 2
(a) A molecular view of one of the two related halves in the asymmetric unit of (IIa), showing the atom-numbering scheme. Displacement ellipsoids are drawn at the 50% probability level. [Symmetry codes: (i) x, y, z + 1; (ii) x, y − 1, z]. (b) An overlapping view of the molecular units of (IIa) and (II) (solid and broken lines, respectively). |