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  Proceedings of the Estonian Academy of Sciences. Chemistry

 

ISSN 1406-0124

Published since 1952 to 2007

Proceedings of the Estonian Academy of Sciences. Chemistry

 

ISSN 1406-0124

Published since 1952 to 2007

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Sonication effects on ester hydrolysis in alcohol–water mixtures; 199-206

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Authors

Sander Piiskop, Hannes Hagu, Jaak Järv, Siim Salmar, Ants Tuulmets

Abstract

Kinetics of the neutral hydrolysis of 4-nitrophenyl chloroacetate was investigated in water and in the presence of 1 mol % of ethanol, propanol, and n-butyl alcohol without sonication and under ultrasound at 25 kHz. Similarly, the kinetics of the acid-catalysed hydrolysis of n-propyl acetate in ethanol–water binary solutions was investigated without sonication and under ultrasound at 22 kHz. The results are discussed together with corresponding data for ethyl and n-butyl acetate from previous works. It was concluded that for ester hydrolyses the solvent effects in an aqueous alcohol binary mixture are limited almost entirely to the hydrophobic ground-state stabilization by the organic co-solvent.

Keywords

binary solvent mixtures, ester hydrolysis, hydrophobic interactions, ultrasound.

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Current Issue: Vol. 56, Issue 4, 2007




Publishing schedule:
No. 1: 20 March
No. 2: 20 June
No. 3: 20 September
No. 4: 20 December