Accession Number : AD0442085

Title :   THE INHIBITED AUTOXIDATION OF STYRENE. PART IV. SOLVENT EFFECTS,

Corporate Author : NATIONAL RESEARCH COUNCIL OF CANADA OTTAWA (ONTARIO) DIV OF APPLIED CHEMISTRY

Personal Author(s) : Howard,J. A. ; Ingold,K. U.

Report Date : 20 NOV 1963

Pagination or Media Count : 14

Abstract : The influence of solvents on the rate of the uninhibited oxidation of styrene can be roughly correlated with the dielectric constants of the solvents. It is suggested that the propagation reaction involves a dipolar transition state and that the magnitude of the solvent effects might be used to identify dipolar transition states in other oxidation reactions. The effecc of solvents on the rate of oxidation of styrene inhibited by phenolic antioxidants is attributed to hydrogenbon bonding interactions between the phenolic hydroxyl group and the solvent. The magnitude of these interactions depends on the acidity of the phenol and on the degree of steric protection afforded the hydroxyl group by ortho-alkyl substituents. (Author)

Descriptors :   (*STYRENES, OXIDATION), (*OXIDATION, INHIBITION), NITRILES, ORGANIC NITROGEN COMPOUNDS, SOLVENTS, REACTION KINETICS, ALKANES, CARBON TETRACHLORIDE, BENZENES, TOLUENES, XYLENES, HALOGENATED HYDROCARBONS, ACETIC ACID, PROPIONIC ACID, BUTANOLS, ETHANOLS, PROPANOLS, NITRATES, CANADA

Distribution Statement : APPROVED FOR PUBLIC RELEASE