Awang, Khalijah and Chan, G. and Ismail, N.H. and Ng, Seik Weng and Tiekink, Edward R.T. (2012) 6-[(2E)-3,7-Dimethylocta-2,6-dien-1-yl]-5,7-dihydroxy-8-(2-methylbutanoyl)-4-phenyl-2H-chromen-2-one–6-[(2E)-3,7-dimethylocta-2,6-dien-1-yl]-5,7-dihydroxy-8-(3-methylbutanoyl)-4-phenyl-2H-chromen-2-one (1/1) from Mesua elegans. Acta Crystallographica Section E: Structure Reports Online, 68. 0939-0940. ISSN 1600-5368, DOI https://doi.org/10.1107/S1600536812008628.
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Abstract
The title co-crystal, C30H34O5·C30H34O5, comprises a 1:1 mixture of two mostly superimposed molecules with the same chemical formula that differ in the nature of the substituent (2-methylbutanoyl or 3-methylbutanoyl) bound at the exocyclic ketone. The lactone ring is close to planar (r.m.s. deviation = 0.058 Å) and the phenyl ring is twisted out of this plane [dihedral angle = 60.08 (9)°]. The geranyl substituent is almost normal to benzene ring to which it is connected [C—C—Car—Car (ar = aromatic) torsion angle = −87.8 (2)°]. Intramolecular O—H...O and O—H...π interactions are formed. In the crystal, supramolecular chains are formed along the a axis owing to C—H...O contacts, with the lactone carbonyl atom accepting two such bonds.
| Item Type: | Article |
|---|---|
| Funders: | UNSPECIFIED |
| Additional Information: | Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia |
| Uncontrolled Keywords: | Exocyclic ketone; Lactone; Geranyl substituent. |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Faculty of Science > Department of Chemistry |
| Depositing User: | Ms. Suhaila Syakila Alby |
| Date Deposited: | 14 Oct 2014 02:40 |
| Last Modified: | 08 Mar 2019 08:33 |
| URI: | http://eprints.um.edu.my/id/eprint/10495 |
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