7,7′-Dihy­droxy-4,4′-dimethyl-3,4-dihydro-2H,2′H-4,6′-bichromene-2,2′-dione

The title compound, C(20)H(16)O(6), which contains one chiral centre, crystallizes as a racemate. The mean planes of the two coumarin units make a dihedral angle of 88.07 (2)°. The pyrone ring containing the chiral centre adopts a sofa conformation. In the crystal, four mol­ecules are linked by O—H⋯...

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Detalles Bibliográficos
Autores principales: Pereira Silva, P. S., Parveen, Mehtab, Ali, Akhtar, Malla, Ali Mohammed, Ramos Silva, M.
Formato: Texto
Lenguaje:English
Publicado: International Union of Crystallography 2010
Materias:
Organic Papers
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3050332/
https://www.ncbi.nlm.nih.gov/pubmed/21522703
http://dx.doi.org/10.1107/S160053681005244X
Descripción
Sumario:The title compound, C(20)H(16)O(6), which contains one chiral centre, crystallizes as a racemate. The mean planes of the two coumarin units make a dihedral angle of 88.07 (2)°. The pyrone ring containing the chiral centre adopts a sofa conformation. In the crystal, four mol­ecules are linked by O—H⋯O hydrogen bonds, forming a tetrameric ring with graph-set motif R (4) (4)(32). These tetramers are further linked by O—H⋯O hydrogen bonds into a three-dimensional network.

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