Micellar effects upon the reaction of hydroxide ion with 2-phenoxyquinoxaline

Article abstract of DOI:10.1002/kin.550261002

Cationic micelles of alkyltrimethylammonium chloride and bromide (alkyl = n - C₁₂H₂₅, n - C₁₄H₂₉, and n - C₁₆H₃₃) catalyze and anionic micelles of sodium dodecyl sulfate inhibit the reaction of hydroxide ion with 2-phenoxyquinoxaline (1). Inert anions such as chloride, nitrate, mesylate, and n-butanosulfonate inhibit the reaction in CTABr by competing with OH^- at the micellar surface. The overall micellar effects on rate in cationic micelles and dilute electrolyte can be treated quantitatively in terms of the pseudo-phase ion-exchange model. The determined second-order rate constants in the micellar pseudo-phase are smaller than the second-order constants in water.