Oxidation of substituted benzaldehydes by quinolinium chlorochromate: a structure and solvent dependent kinetic study

摘要

The kinetics of oxidation of several para-substituted benzaldehydes by qinolinium chlorochromate was studied under pseudo-first-order conditions in different (hydrogen bond donor and hydrogen bond acceptor) neat organic solvents. The operation of nonspecific and specific solvent-solvent-solute interactions was explored by correlating the rate data with solvent parameters through correlation analysis. Both electron-releasing and electron-withdrawing substituents enhanced the rate and the Hammett plot showed a break in the reactivity order indicating applicability of dual mechanis. An explanation in conformity with structure and solvent effects on reactivity has been proposed.