Dimethyl 2,2′-[(4-oxo-2-phenyl-4H-chromene-5,7-diyl)dioxy]diacetate: A more densely packed polymorph

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dc.contributor.authorNallasivam, Angannan
dc.contributor.authorNethaji, Munirathinam
dc.contributor.authorVembu, Nagarajan
dc.contributor.authorJaswant, Buckle
dc.contributor.authorSulochana, Nagarajan
dc.date.accessioned2026-08-25T05:46:33Z
dc.date.available2026-08-25T05:46:33Z
dc.date.issued2009-01-14
dc.description.abstractThe title mol-ecule, C21H18O8, crystallizes in two crystal polymorphs, see also Nallasivam, Nethaji, Vembu & Jaswant [Acta Cryst. (2009), E65, o314-o315]. The mol-ecules of both polymorphs differ by the conformation of the oxomethyl-acetate groups. The title mol-ecules are rather planar compared to the mol-ecules of the other polymorph. In the title mol-ecule, one of the oxomethyl-acetate groups is disordered (occupancies of 0.6058/0.3942). The structures of both polymorphs are stabilized by C - H⋯O and C - H⋯π inter-actions. Due to the planarity of the title mol-ecules and similar inter-molecular inter-actions, the title mol-ecules are more densely packed than those of the other polymorph.
dc.identifier.issn1600-5368
dc.identifier.urihttps://doi.org/10.1107/S1600536809003948 http://nitt.ndl.gov.in/handle/123456789/239
dc.language.isoen
dc.publisherInternational Union of Crystallography
dc.relation.ispartofseriesActa Crystallographica Section E: Structure Reports Online; Vol. 65/ No. 2
dc.titleDimethyl 2,2′-[(4-oxo-2-phenyl-4H-chromene-5,7-diyl)dioxy]diacetate: A more densely packed polymorph
dc.typeArticle
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