Effect of solvents on the electronic absorption spectra of some thioschiff bases

ABSTRACT

The electronic absorption spectra of substituted benzylidene-O- amino- thiophenol in some organic solvents of different polarities have been investigated. The spectra obtained in ethanol comprised mainly 4 bands, assigned to corresponding electronic transitions. The results indicated that the spectral shifts were governed by the dielectric constants of the solvents. UV-visible spectra of the thioschiff bases were correlated with the calculated data from theoretical treatment by applying Pariser-Parr-Pople Self-Consistent Field approach [SGF PPP CI]