Journal of the Chemical Society. Perkin transactions II p. 1411 - 1414 (1995)
Update date:2022-08-11
Topics:
Noordman, Wouter H.
Blokzijl, Wilfried
Engberts, Jan B. F. N.
Blandamer, Michael J.
Kinetic data are reported for the spontaneous hydrolysis of 1-benzoyl-1,2,4-triazole in aqueous solutions at ambient pressure and 298.2 K, in aqueous solutions containing added ethanol, propanol and sodium chloride.Kinetic data are also reported for the same reaction in aqueous mixtures of sodium chloride and ethanol.When either ethanol or propanol are added the rate constant k decreases, plotes of ln(k) vs. molality of alcohol being linear.The patterns are accounted for using pairwise Gibbs energy interaction parameters.The rate constant k decrease more dramatically when sodium chloride is added.This pattern is accounted for using pairwise and triplet interaction parameters.The dependence of rate constant on molality of added ethanol in solutions containing fixed molalities of sodium chloride deviaties from that predicted using the pairwise interaction parameters indicating a non-additivity of salt and alcohol effects on the rate constant.The deviations increase wirh increase in molalities of both added salt and added solvent in a direction consistent with a disruption of the substrate-alcohol hydrophobic interactions by added salt.
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