Crystal structures of ethyl 6-(4-methyl­phen­yl)-4-oxo-4H-chromene-2-carboxyl­ate and ethyl 6-(4-fluoro­phen­yl)-4-oxo-4H-chromene-2-carboxyl­ate

Gomes, L.R.; Low, J.N.; Fernandes, C.; Gaspar, A.; Borges, F.

doi:10.1107/S2056989015022781

Acta Crystallographica Section E
Acta Crystallographica
Section E CRYSTALLOGRAPHIC COMMUNICATIONS

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Figure 3
The relative position of the ethyl carboxylate residue with respect to the chromone ring. Molecules may have any conformation between two possible extremes: conformation A where the carbonyl groups are trans-related and conformation B where they are cis-related.

CRYSTALLOGRAPHIC
COMMUNICATIONS

ISSN: 2056-9890

Volume 72| Part 1| January 2016| Pages 8-13

doi:10.1107/S2056989015022781

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