NDLI: 7,7',8,8'-Tetra-meth-oxy-4,4'-dimethyl-3,3'-bicoumarin.

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7,7',8,8'-Tetra-meth-oxy-4,4'-dimethyl-3,3'-bicoumarin.

Content Provider	Europe PMC
Author	Fun, Hoong-Kun Jebas, Samuel Robinson Parveen, Mehtab Khanam, Zakia Ghalib, Raza Murad
Copyright Year	2009
Abstract	In the crystal structure, the title compound, C24H22O8, lies on a twofold rotation axis and the asymmetric unit comprises one half-molecule. The dihedral angle formed by the coumarin unit with the symmetry-related part is 74.78 (14)°. One of the methoxy groups attached to the coumarin unit is considerably twisted, making an angle of 87.17 (17)° with respect to the coumarin unit; the other is twisted by 0.66 (19)°. No classical hydrogen bonds are found in the sturcture; only a weak C—H⋯π interaction and short intramolecular O⋯O contacts [2.683 (2)–2.701 (2) Å] are observed.
Journal	Acta crystallographica. Section E, Structure Reports Online
Volume Number	65
PubMed Central reference number	PMC2969639
Issue Number	Pt 6
Issue Number	pt 6
PubMed reference number	21583154
e-ISSN	16005368
DOI	10.1107/s1600536809017334
Language	English
Publisher	International Union of Crystallography
Publisher Date	2009-05-14
Access Restriction	Open
Rights License	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. © Fun et al. 2009
Content Type	Text
Resource Type	Article
Subject	Chemistry Condensed Matter Physics Materials Science

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