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
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author Pereira Silva, P. S.
Parveen, Mehtab
Ali, Akhtar
Malla, Ali Mohammed
Ramos Silva, M.
author_facet Pereira Silva, P. S.
Parveen, Mehtab
Ali, Akhtar
Malla, Ali Mohammed
Ramos Silva, M.
author_sort Pereira Silva, P. S.
collection PubMed
description 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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spelling pubmed-30503322011-04-26 7,7′-Dihy­droxy-4,4′-dimethyl-3,4-dihydro-2H,2′H-4,6′-bichromene-2,2′-dione Pereira Silva, P. S. Parveen, Mehtab Ali, Akhtar Malla, Ali Mohammed Ramos Silva, M. Acta Crystallogr Sect E Struct Rep Online Organic Papers 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. International Union of Crystallography 2010-12-18 /pmc/articles/PMC3050332/ /pubmed/21522703 http://dx.doi.org/10.1107/S160053681005244X Text en © Pereira Silva et al. 2011 http://creativecommons.org/licenses/by/2.0/uk/ This is an open-access article distributed under the terms of the Creative Commons Attribution Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
spellingShingle Organic Papers
Pereira Silva, P. S.
Parveen, Mehtab
Ali, Akhtar
Malla, Ali Mohammed
Ramos Silva, M.
7,7′-Dihy­droxy-4,4′-dimethyl-3,4-dihydro-2H,2′H-4,6′-bichromene-2,2′-dione
title 7,7′-Dihy­droxy-4,4′-dimethyl-3,4-dihydro-2H,2′H-4,6′-bichromene-2,2′-dione
title_full 7,7′-Dihy­droxy-4,4′-dimethyl-3,4-dihydro-2H,2′H-4,6′-bichromene-2,2′-dione
title_fullStr 7,7′-Dihy­droxy-4,4′-dimethyl-3,4-dihydro-2H,2′H-4,6′-bichromene-2,2′-dione
title_full_unstemmed 7,7′-Dihy­droxy-4,4′-dimethyl-3,4-dihydro-2H,2′H-4,6′-bichromene-2,2′-dione
title_short 7,7′-Dihy­droxy-4,4′-dimethyl-3,4-dihydro-2H,2′H-4,6′-bichromene-2,2′-dione
title_sort 7,7′-dihy­droxy-4,4′-dimethyl-3,4-dihydro-2h,2′h-4,6′-bichromene-2,2′-dione
topic Organic Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3050332/
https://www.ncbi.nlm.nih.gov/pubmed/21522703
http://dx.doi.org/10.1107/S160053681005244X
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