Ethyl 2-[(2-oxo-2H-chromen-6-yl)oxy]acetate

Abstract

Ethyl 2-[(2-oxo-2H-chromen-6-yl)oxy]acetate, C13H12O5, a member of the pharmacologically important class of coumarins, crystallizes in the monoclinic C2/c space group in the form of sheets, within which molecules are related by inversion centers and 21 axes. Multiple C—H...O weak hydrogen-bonding interactions reinforce this pattern. The planes of these sheets are oriented in the approximate direction of the ac face diagonal. Intersheet interactions are a combination of coumarin system π–π stacking and additional C—H...O weak hydrogen bonds between ethyl acetoxy groups.

Keywords

• chromen-2-one
• coumarin
• weak c—h...o h-bonding
• sheet structure
• π–π stacking
• crystal structure