Organic Assemblies of 2-pyridones with Dicarboxylic Acids

The syntheses and crystal structures of four cocrystals; 2-pyridone fumaric acid (2/1), 2-pyridone meso -2,3-dibromosuccinic acid (2/1), 5-chloro-2-pyridone adipic acid (2/1) and 6-methyl-2-pyridone ( S )-malic acid (2/1), are reported. The competition between two self- and mutually-complementary hydrogen-bond moieties (carboxylic acid and 2-pyridone) are examined and compared with results obtained from an earlier study of 2-pyridone and unsubstituted aliphatic dicarboxylic acids.