Polarographic and spectrophotometric behaviour of some aminoazole derivatives

ABSTRACT

The structure of differently substituted azole amines is receiving considerable interest [1,3] but the structure of aminoisoxazolnes has seldom been adequately investigated. Literature inspection reveales that only few 3-amino-isoxazolones have been synthesised. Elnagdi et al [4] described the synthesis of 5- amino - 4- arylhydrazono-1,2 oxazole-3- ones [1] and their isomeric 3- amino-4- arylhydrazono-l,2-oxazole-5- ones [2]. However, the structure of these isoxazolone derivaties have not been exclusively defined. In conjunction with any investigation aiming to test the potential of the above compounds as dyes and precursors in dye synthesis, better understanding of the structure of these compounds seemed to be of value. In the present work, the polarographic behaviours of compounds [1] and [2] studies and pK values are calculated, to get insight into the nature of the various tautomeric structures of [1] and [2] their electroreduction in alcoholic buffered media covering a wide range of pH