Journal of Physical Chemistry p. 12318 - 12326 (1995)
Update date:2022-08-11
Topics:
Garcia-Rio, L.
Leis, J. R.
Iglesias, E.
The kinetics of solvolysis of diphenylmethyl chloride, 4-nitrophenyl chloroformate, benzoyl chloride, p-anisoyl chloride, and bis(4-nitrophenyl)carbonate in water/AOT/isooctane microemulsions with various water/surfactant mole ratios W (AOT = sodium bis(2-ethylhexyl)sulfosuccinate) were interpreted by using a pseudophase model in which the substrates are assumed to be distributed between the isooctane and interface phases.The W-dependence of the intrinsic rate constants k for solvolysis at the interface depends on the solvolysis mechanism: for SN1 reactions, k decreased with W, which is attributed to decreasing polarity of the interface; contrariwise, SN2 reactions are accelerated by decreasing W, which is attributed to increasing nucleophilicity of interfacial water.
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