PHYSICOCHEMICAL STUDY AND REACTIVITY OF CHARGE-TRANSFER COMPLEXES BETWEEN SUBSTITUTED AZOMETHINES AND P-BENZOQUINONES

Substituted imines (donors) and accepters such as the chloranil (CHL), the bromanil (BRL) and the 2,3-dichloro-5,6-dicyano benzoquinone (DDQ ) form charge transfert complexes in the liquid and solid states. Phys ico-chemical properties as well as the reactivity of the complexes hav e been studied. Complexes maximal wave lengths and their formation con stants and the ionization potentials of the donors have been determine d by UV-visible absorption spectrometry. The CTC formation is confirme d by infrared, CNMR, and mass (electronic impact method) spectra. The unexpected formation of the substitution derivatives of the CHL and th e BRL has been investigated and explained.