Caractérisation spectrométrique d'azo-composés tinctoriaux et de systèmes acylants potentiels.

Abstract

This work titled : « Spectrométrie characterization of acylanl systems and tinctorial azo-compounds », present and treats a whole of structural analytic and synthetic studies for a set of chromoyen azo-compounds and potential acylant solutions. It is constituted of three essential parts as follows: The first part carried on an organic synthesis of chromogen donoracceptor azo-compounds by a classic w<ary. These products have been used like initial substrate for the storey of their UV-visible electronic absorption properties that permitted to pul in evidence the existence of tautomer eauilibrium between azo and uinonehydrazone shapes, analytic characterization has especially been put in relief by original graphic illustrations. The results are discussed and interpreted. The second part concerns the structural analysis by the I. R , Raman and SMR of potential acylanl species generated by the interaction of carboxylic acid: and anhydrides. Proton and acyl group transfer mechanisms involved have been studied and interpreted. X-ray diffraction is used to study and resolve structural constitution of two azo-naphto! crystalline coumpounds in the third part.