The influence of the nature of acidic medium on the kinetics and the
mechanism of the hydrolysis of pyrrolidenc bcnzoylhydrazone (PBH) and
thiophenylidene benzoylhydrazone (TBH) has been studied.
The observed rate constants, activation energy and thermodynamic parameters for
the hydrolysis of PBH and TBH in tetraoxalate buffer solutions at 35°C have
been measured. These results were compared with that reported for furfurylidene
benzoylhydrazone FBH and the effect of heteroatom on the hydrolysis has been
investigated.
In presence of tetraoxalate buffer as a hydrolysis medium for TBH, the
catalytic rate constants with respect to H+. F{C204 and H2C204 were calculated.
An equation relating the observed rate constant to the concentration of all
species in the buffer mixture has been constructed.