Author/Authors :
Suthiphasilp, Virayu Center of Chemical Innovation for Sustainability (CIS) and School of Science - Mae Fah Luang University, Thailand , Meesakul, Pornphimol Center of Chemical Innovation for Sustainability (CIS) and School of Science - Mae Fah Luang University, Thailand , Richardson, Christopher School of Chemistry and Molecular Bioscience - University of Wollongong, Australia , Pyne, Stephen G. School of Chemistry and Molecular Bioscience - University of Wollongong, Australia , Laphookhieo, Surat Center of Chemical Innovation for Sustainability (CIS) and School of Science - Mae Fah Luang University, Thailand
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.
Keywords :
crystal structure , natural product , lawinal , flavanone
