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The E and Z isomers of 3-(benzoxazol-2-yl)­prop-2-enoic acid

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Abstract:

The carboxyl­ic acid group and the double bond are coplanar in (E)-3-(benzoxazol-2-yl)­prop-2-enoic acid, C10H7NO3, whereas in isomeric (Z)-3-(benzoxazol-2-yl)­prop-2-enoic acid, also C10H7NO3, they are almost orthogonal. In both isomers, a strong O—H…N hydrogen bond, with the carboxyl­ic acid group as a donor and the pyridine-like N atom as an acceptor, and weak C—H…O interactions contribute to the observed supramolecular structures, which are completed by – stacking interactions between oxazole and benzenoid rings.

Document Type: Research Article

DOI: http://dx.doi.org/10.1107/S0108270104017743

Publication date: October 1, 2004

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