Supramolecular structure of S-(+)-marmesin-a linear dihydrofuranocoumarin

[摘要] The title compound, C₁₄H₁₄O₄, a linear dihydrofuranocoumarin, was isolated from the bark of Aegle marmelos, a plant widely used in Ayurvedic system of medicine for the treatment of various ailments. The crystal structure was determined from X-ray diffraction data using direct methods. The compound crystallizes into monoclinic space group ð‘�?2₁ with unit cell parameters: ð‘�? = 5.721(1) Ã�?, ð‘�? = 13.810(1) Ã�?, ð‘�? = 7.864(2) Ã�?, ð›�? = 100.39(1)°, ð‘�? = 2. The structure was refined by full-matrix least-squares to a final ð‘�?? value of 0.0523 for 1184 observed reflections. The benzopyran moiety is perfectly planar. The dihedral angle between the pyrone and benzene rings is 0.3(1)°. The furan ring has a 2ð›�?-envelope conformation. The molecules are linked by Oâ€�?�H…O hydrogen bonds into chains and these chains are linked into sheets by Câ€�?�H…O hydrogen bonds. Further, the 𝜋âˆ�?�ðœ�?? stacking and Câ€�?�H$ldotspi$(arene) interactions link all of the sheets into a supramolecular structure.

[学科分类] 材料工程

[关键词] Supramolecular structure;direct methods;hydrogen bond;𝜋âˆ�?�ðœ�?? interaction;envelope;furano-coumarin.