Tetrahedron Letters p. 1051 - 1054 (1989)
Update date:2022-07-29
Topics:
Hioka, N.
Politi, M. J.
Chaimovich, H.
The critical micelle concentration (CMC) of N-hexadecyl-4-cyanopyridinium (HCP) bromide, determined by conductivity or fluorescence quenching, was 7-8 * 10-4 M.The observed rate constants for the hydrolysis of HCP below the CMC increased with the concentration of this amphiphile from 2 * 10-6 M up to the CMC.The product ratio (pyridone/amide) also varied with HCP concentration.The analysis of both concentration-rate profiles and product composition demonstrated that HCP undergoes premicellar aggregation at concentrations one hunred fold lower than its CMC.
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