Browsing by Author "Sunil Kumar Mazumdar"
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PublicationArticle Flemiculosin, a novel chalcone(Blackwell Munksgaard, 1999) Kinkini Bhattacharyya; Sunil Kumar Mazumdar; Gabriele Bocelli; Andrea Cantoni; Anil B. Ray; Partha Neogi; Gauri MazumdarThe title compound, 6-cinnamoyl-5-hydroxy-2,2,8,8-tetramethyl-2H,8H-pyrano[2,3-f]chromene, C25H24O4, is an angular benzodipyran system. It contains a central tricyclic core and a peripheral aromatic ring. The central ring of the tricyclic core is fully substituted while the pyran rings on either side are each unsubstituted at two sites. The central fully substituted ring is planar within 0.014 Å. One pyran ring is planar to within 0.041 Å, but the second pyran ring is only planar to within 0.156 Å; this may be attributed to an intramolecular C - H⋯O contact of 2.30 Å. The structure is stabilized by intramolecular O - H⋯O hydrogen bonds.PublicationArticle Flemiculosin, a novel chalcone. Erratum(Blackwell Munksgaard, 1999) Kinkini Bhattacharyya; Sunil Kumar Mazumdar; Gabriele Bocelli; Andrea Cantoni; Anil B. Ray; Partha Khattri; Gauri Mazumdar[No abstract available]