Phenyl- and mesitylglyoxylic acids: catemeric hydrogen bonding in two alpha-keto acids


alpha-Oxobenzeneacetic (phenylglyoxylic) acid, C(8)H(6)O(3), adopts a transoid dicarbonyl conformation in the solid state, with the carboxyl group rotated 44.4 (1) degrees from the nearly planar benzoyl moiety. The heterochiral acid-to-ketone catemers [O.O = 2. 686 (3) and H.O = 1.78 (4) A] have a second, longer, intermolecular O-H.O contact to a carboxyl… (More)


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