The Basis of Stability in Lysine and Arginine Salts of Unsaturated Fatty Acids

摘要

The mechanism and generality of the known stabilization against autoxidation conferred on linoleic acid by certain basic amino acids, such as lysine and arginine, was investigated. Basic amino acids were the only class of compounds found to confer the effect. However, the smallest basic amino acid, 2, 3-diaminopropionic acid was not effective, nor was a beta, omega-diamino acid, 3,6-diaminohexanoic acid although a simple isomer of lysine. The stabilization was observed only in the solid phase. Inclusion of sodium chloride in the solid matrix was deleterious to the effect. A large number of physical and chemical observations were made and correlated but it was not found possible to draw detailed conclusions about the mechanism of stabilization. On the basis of the reported observations no detailed structure of the stabilized complex can be suggested. The cause of the phenomenon appears to be closely associated with the physical arrangement of the ions in the crystal lattice. (Author)