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7,7'-Dihy-droxy-4,4'-dimethyl-3,4-dihydro-2H,2'H-4,6'-bichromene-2,2'-dione.

Pereira Silva PS, Parveen M, Ali A, Malla AM, Ramos Silva M - Acta Crystallogr Sect E Struct Rep Online (2010)

Bottom Line: The pyrone ring containing the chiral centre adopts a sofa conformation.In the crystal, four mol-ecules 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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ABSTRACT
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 mol-ecules 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.

No MeSH data available.


A plot of the title compound. Displacement ellipsoids are drawn at the 50% probability level.
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Fap1: A plot of the title compound. Displacement ellipsoids are drawn at the 50% probability level.


7,7'-Dihy-droxy-4,4'-dimethyl-3,4-dihydro-2H,2'H-4,6'-bichromene-2,2'-dione.

Pereira Silva PS, Parveen M, Ali A, Malla AM, Ramos Silva M - Acta Crystallogr Sect E Struct Rep Online (2010)

A plot of the title compound. Displacement ellipsoids are drawn at the 50% probability level.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3050332&req=5

Fap1: A plot of the title compound. Displacement ellipsoids are drawn at the 50% probability level.
Bottom Line: The pyrone ring containing the chiral centre adopts a sofa conformation.In the crystal, four mol-ecules 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.

View Article: PubMed Central - HTML - PubMed

ABSTRACT
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 mol-ecules 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.

No MeSH data available.