Effects of Alkyl Chain Length on Molecular Interactions. II. Complex Isomerism in the Alkyl p-Aminobenzoate-Picric Acid Systems

Abstract
While a combination of p-aminobenzoic acid and picric acid gives a yellow-colored salt by proton transfer, the esterification of the former component compound with methyl to octadecyl groups results in the formation of not only stable salts but also metastable charge-transfer complexes.