Please use this identifier to cite or link to this item:
https://hdl.handle.net/10316/109983
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Pereira Silva, P. S. | - |
dc.contributor.author | Parveen, Mehtab | - |
dc.contributor.author | Ali, Akhtar | - |
dc.contributor.author | Malla, Ali Mohammed | - |
dc.contributor.author | Silva, M. Ramos | - |
dc.date.accessioned | 2023-11-10T09:19:44Z | - |
dc.date.available | 2023-11-10T09:19:44Z | - |
dc.date.issued | 2010-12-18 | - |
dc.identifier.issn | 1600-5368 | pt |
dc.identifier.uri | http://hdl.handle.net/10316/109983 | - |
dc.description.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. | pt |
dc.language.iso | eng | pt |
dc.publisher | International Union of Crystallography | pt |
dc.relation | SFRH/BD/38387/ 2008 | pt |
dc.rights | openAccess | pt |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | pt |
dc.subject | single-crystal X-ray study | pt |
dc.subject | T = 293 K; mean (C–C) = 0.002 A° | pt |
dc.subject | R factor = 0.040 | pt |
dc.subject | wR factor = 0.109 | pt |
dc.subject | data-to-parameter ratio = 18.6 | pt |
dc.title | 7,7'-Dihy-droxy-4,4'-dimethyl-3,4-dihydro-2H,2'H-4,6'-bichromene-2,2'-dione | pt |
dc.type | article | - |
degois.publication.firstPage | o201 | pt |
degois.publication.lastPage | o201 | pt |
degois.publication.issue | Pt 1 | pt |
degois.publication.title | Acta Crystallographica Section E: Structure Reports Online | pt |
dc.peerreviewed | yes | pt |
dc.identifier.doi | 10.1107/S160053681005244X | pt |
degois.publication.volume | 67 | pt |
dc.date.embargo | 2010-12-18 | * |
uc.date.periodoEmbargo | 0 | pt |
item.languageiso639-1 | en | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.grantfulltext | open | - |
item.fulltext | Com Texto completo | - |
item.cerifentitytype | Publications | - |
item.openairetype | article | - |
crisitem.author.orcid | 0000-0001-9555-8856 | - |
Appears in Collections: | FCTUC Física - Artigos em Revistas Internacionais |
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File | Description | Size | Format | |
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77Dihydroxy44dimethyl34dihydro2H2H4-6bichromene22dioneActa-Crystallographica-Section-E-Structure-Reports-Online.pdf | 402.04 kB | Adobe PDF | View/Open |
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