Two new polymorphs of 4-(N,N-dimethylamino)benzoic acid.
Two new polymorphs of 4-(N,N-dimethylamino)benzoic acid, C9H11NO2, resulting from the attempted cocrystallization in ethanol of 4-(N,N-dimethylamino)benzoic acid and a mixture of 3-(N,N-dimethylamino)benzoic acid and 3-(3-pyridyl)-2-pyridone producing one polymorph, and a mixture of 3-(N,N-dimethylamino)benzoic acid and 5-methoxy-3,3'-bipyridine producing the second polymorph, have been crystallographically characterized. The primary intermolecular O-H...O hydrogen bonds generate a dimeric acid-acid motif that is present in all three polymorphs.
Aakeröy
Christer B
CB
Department of Chemistry, Kansas State University, Manhattan, KS 66506, USA. aakeroy@ksu.edu
Desper
John
J
Levin
Brock
B