ELECTROCHEMICAL BEHAVIOUR OF SOME PYRIMIDINE DERIVATIVES - POLAROGRAPHIC REDUCTION OF 1,3-DIMETHYL-2,4,6(1H,3H,5H)PYRIMIDINETRIONE AND ITS SUBSTITUTED 5-PHENYLAZO DERIVATIVE

摘要

The polarographic behaviour and spectrophotometric pK(a) of 1,3-dimethyl barbituric acid and 5-phenylazo-substituted products were investigated in a buffer solution of pH 2-11. The results revealed an azo form of the substituted products; a mechanism for the electroreduction pathway was suggested. Half-wave potentials showed fair correlation with a constants while pK(a) showed almost no dependence on substituents. [References: 24]