Abstract
The electronic absorption spectra of some salicylidine-2-aminothiophenol schiff bases are studied in nine solvents of different polarities. The spectra comprise five absorption bands: their wavelength maxima ‘ λ max’ and the molar absorptivities ‘ε max’ are given. Band assignments of the observed absorption bands are given and correlated with the possible electronic transitions. The effect of solvents on the intranolecular CT bands is studied using the unified scale of solvent polarities for specific and non-specific interactions ( ECW model) in comparison with the β− π * scale.
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