Interplay between dipolar, stacking and hydrogen-bond interactions in the crystal structures of unsymmetrically substituted esters, amides and nitriles of (R,R)-O,O′-dibenzoyltartaric acid

Rychlewska, U.; Warzajtis, B.

doi:10.1107/S010876810100430X

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

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Figure 8
BOH2: layers of hydrogen-bonded molecules arranged in a close-packed fashion lie perpendicular to the 20 Å direction. Phenyl rings that stick out of the hydrophilic layer are engaged in sandwich-stacking interactions. A highlighted fragment of the layer illustrates five types of interactions between two neighbouring molecules: sandwich stacking and N—H⋯O=C(Bz), OW—H⋯O=C(carboxyl), OW—H⋯O=C(amide), and C—H⋯O=C(amide) hydrogen bonds (only H atoms involved in hydrogen bonds are shown). The unit is further linked via water molecules in two directions: the x direction [units related by translation, C²₂(9) pattern] and the y direction [units related by a twofold screw axis, C²₂(6) homodromic chain].

STRUCTURAL SCIENCE
CRYSTAL ENGINEERING
MATERIALS

ISSN: 2052-5206

Volume 57| Part 3| May 2001| Pages 415-427

doi:10.1107/S010876810100430X

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