Electrochemical Reduction Behaviour of α-Methylbenzylchloride

摘要

Cyclic voltammetry at hanging mercury drop electrode (HMDE) and differential pulse polarography at dropping mercury electrode (DME) arc used to two-electron cleavage of carbon-halogen bond in α-methylbenzylchloride in the presence of tetramelhylammonium hexafluorophosphate (TMAHP), tetraethylammonium bromide (TEAB), tetra-n-propylammonium perchlorate (TPAP), and tetrabutylammonium iodide (TBAI) as the supporting electrolytes. The reduction potentials of α-methylbenzylchloride are found to be in the range―2.14 to―2.56V vs Ag/AgCl and are shown to be sensitive to the nature of the cation of the supporting electrolyte. As the size of the telraalkylammonium cation of the supporting electrolyte increases the voltammetric/polarographic peak moves towards more negative potentials. The analytical procedure is developed by differential pulse polarography for the determination of α-methylbenzylchloridc during the electrosynthesis of 2-arylpropionic acids.