Polarographic Behavior of 5-PhenyIazopyrimidinetrione and Its Substituted Derivatives

摘要

The polarographic behavior of 5-phenylazo-2-thiobarbituric acid and 5 of its substituted derivatives was investigated in a buffer solution of pH (2—12). A mechanism for the reduction pathway is suggested. Based on the results of the nitro derivative, the coupling product of 2-thiobarbituric acid with diazonium salt is most probably in the azo and not the hydrazone form. The most reliable El/2 values at different pH's were correlated to Hammctt's