Electrochemical Reduction Studies of Isocinchomeronic Acid at Mercury Cathode

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The polarographic behaviour of isocinchomeronic acid (2,5 – pyridine dicarboxylic acid) has been studied at dropping mercury electrode (dme) in buffer solution of various pH values. The polarographic half-wave potentials are shifted to more negative values, whilst limiting current is found to decrease with increase in the pH of the buffer solution. The polarographic wave for the reduction process is found to be irreseversible and the limitng current is diffusion controlled. The values of the kinetic parameters are computed using Meites – Israel method. The reduction products of controlled potential electrolysis at mercury pool cathode are found to be aldehyde and alcohol in the buffer solutions of lower and higher pH values respectively. A suitable mechanism is also suggested for the electrode reaction.

Isocinchomeronic acid; mercury cathod; Polarographic behaviour