For the first time, kinetics and mechanism of
reaction between 4-methyl-benzaldehyde, 4-bromoaniline
and methyl acetoacetate is spectrally investigated in the
presence of La(NO3)3.6H2O as a catalyst. Based on the
experiment data, the overall order of the reaction is two.
The second-order rate constant dependency on the temperature
was in agreement with the Arrhenius and Eyring
equations. The kinetic and thermodynamic parameters of
the reaction have been calculated. Furthermore, useful
information was obtained from studies of the effect of
solvent and concentration of reactants on the reaction rate.
The results showed that the second step of the reaction
mechanism is a rate-determining step (RDS). The proposed
mechanism was also confirmed according to the obtained
results and the steady state approximation.
