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( )-3-Ethyl-2-methyl-4-oxo­cyclo­hexane­carboxyl­ic acid: catemeric hydrogen bonding in a cyclic -keto acid

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In the title compound, C10H16O3, the two mol­ecules of the asymmetric unit form acid-to-ketone hydrogen-bonded chains. The two species differ only very slightly and are related by a pseudo-center, so that the apparent translational relationship among the units of the hydrogen-bonded chain is actually a pseudo-translation, with the mol­ecules alternating in type. Two counterdirectional pairs of chains proceed through each cell [O…O = 2.743 (2) and 2.683 (2) Å, and O—H…O = 171 (3) and 157 (3)°]. Three intermolecular C—H…O close contacts were found, involving all three O atoms of one of the mol­ecules.
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Document Type: Research Article

Publication date: 2004-06-01

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