N. Feeder, W. Jones
May 15, 1994
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Abstract
Two polymorphs of 6-oxo-6-(phenylamino)hexanoic acid, C 12 H 15 NO 3 , have been observed. In the first, (I), intermolecular hydrogen bonds form ribbons of molecules, while in the second, (II), a more planar molecular conformation allows the hydrogen bonding to extend to form sheets. The structure of (III), C 11 H 13 NO 3 , is also presented and, as a result of the N-methyl substitution, hydrogen bonding is restricted to the formation of carboxylic acid dimers