Electrochemical Characteristics of N-Phenylmonoamide Derivatives of some 1,2-Dicarboxylic Acids

Department of Chemistry, Regional Engineering College, Warangal-506 004
Department of Chemistry, G. Pulla Reddy Engineering College, Pulla Reddy Nagar, Kurnool-518 002
Manuscript received 16 December 1992, revised 9 June 1993, accepted 12 October 1993

Electrochemical investigations have been carried out on a few NaL systems by cyclic voltammetric and coulometric techniques, where HL' s are N-phenylmonoamide derivatives of 1,2-dicarboxylic acids (1), on mercury electrode in a buffered aqueous media (pH range 6-12) at room temperature (25°). Only the maleic acid derivatives respond electrochemically in the potential range 0.00 to (-)2.00 V vs Ag/AgCI, yielding pH-dependent irreversible electron transfer profiles in the potential range (-)1.00 to (-)1.60 V, whereas the phthalic and succinic acid derivatives are electrochemically quiet even up to (-)2.00 V. A plausible pH-dependent mechanism for the CV profiles of the maleic acid derivatives is suggested. The diffusion coefficients of the L- systems are calculated.