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Figure 6
Stereoview of the close packing of (VIIb) and (VIIIb). The alternating two-dimensional isostructurality is revealed by the antiparallel helices in (VIIIb) versus the parallel helices in (VIIb). In both structures, the enantiomers denoted by 4R are held together by the hydrogen bonds shown in green, whereas the helices with 4S configuration are shown by yellow hydrogen bonds. The antiparallel double helix in (VIIIb) is indicated in blue (4R) and red (4S). (Reproduced from Kálmán et al., 2004BB21.)

ISSN: 2052-5206
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