Different forms of antiparallel stacking of hydrogen-bonded antidromic rings in the solid state: polymorphism with virtually the same unit cell and two-dimensional isostructurality with alternating layers

Kálmán, A.; Fábián, L.; Argay, G.; Bernáth, G.; Gyarmati, Z.Cs.

doi:10.1107/S0108768104024553

Acta Crystallographica Section B
Acta Crystallographica
Section B STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS

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Figure 6
Stereoview of the close packing of (3) and (4). The alternate two-dimensional isostructurality is revealed by the antiparallel helices in (3) versus the parallel helices in (4). In both structures the enantiomers denoted by 4R are held together by the hydrogen bonds shown in green, whereas the helices with a 4S configuration are shown by yellow hydrogen bonds. The antiparallel double helix in (3) is indicated in blue (4R) and red (4S).

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 60| Part 6| November 2004| Pages 755-762

doi:10.1107/S0108768104024553

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