Figure 14
Similarities in packing in the crystal structures of (a) HOM1 and (b) HN13 described by the common pattern designator R44(16). (c) Further extension of this pattern in HOM1 by means of a second set of molecules which differ in conformation from their neighbours by a 180° rotation around one of the two Csp3—Csp2 bonds. (d) In HN13 where such changes of conformation are precluded, the molecules are further connected by hydrogen bonds via mediating water molecules. |