Abstract
The structure of the natural product lawinal [systematic name: (−)-(2S)-5,7-dihydroxy-6-methyl-4-oxo-2-phenylchromane-8-carbaldehyde, C17H14O5] at 150 K is reported. The compound crystallizes with monoclinic (I2) symmetry and with Z′ = 2. The absolute configuration could not be determined reliably from X-ray analysis only. However, our analysis returns the S-configuration at the C-2 position, consistent with previous stereochemical assignment from specific rotation. The independent molecules form into alternating hydrogen-bonded chains with C—H...O=CH intermolecular linkages that run parallel to the crystallographic a axis and are extended into the ac plane by π–π interactions between their phenyl substituents.
Funder
Thailand Science Research and Innovation
Mae Fah Luang University
Publisher
International Union of Crystallography (IUCr)
Subject
Condensed Matter Physics,General Materials Science,General Chemistry