Figure 6
Second-level hydrogen-bond system of (II) at 150 (2) K: (a) C22 (6 ) chain expanding along [010]; (b) projection of the layer at ½c onto (001); (c) R88 (24 ) ring formed by two interpenetrating C22 (6 ) chains running along [100] and [010], and viewed along c [(i) x + ½, −y + ½, −z + ¾, (ii) −y + ½, x + ½, z + ¼]; (d) condensed R88 (24 ) rings in the xy½ layer in projection onto (001). |