Kinetic Evidence for Oxydianionic Tetrahedral Intermediate in the Hydrolysis of Methyl Salicylate

S. Sugunan and Mercy lype

¹Department of Applied Chemistry,Cochin University of Science and Technology, Kerala India.

²Senior Lecturer, Department of Chemistry, Marthoma College, Tiruvalla, Kerala India.

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ABSTRACT:

The alkaline hydrolysis of methyl salicylate in 5%, 20% and 40% (v/v) aq 1.4 dioxane is studied as a function of (OH)- from 0.05- 0.4 mole dm-3 at constant ionic strength. The observed pseudo first order rate coefficient is found to be made up of terms due to the attack of H2O molecule and OH on ionized methyl-salicylate and a term involving the participation of oxydianionic tetrahedral intermediate.

KEYWORDS:

Alkaline; Hydrolysis; H2O; Oxydianionic