Molecular complexes of substituted diphenyl sulphides with π acceptors. Charge transfer spectra and ionization potentials of the donors

Abstract

Charge transfer complexes of substituted diphenyl sulphides as donors with tetracyanoethylene, 2,3-dichloro-5,6-dicyano-p-benzoquinone and chloranil have been studied spectrophotometrically. From the energies of the charge transfer transitions, the ionization potentials of the donors have been obtained. From the formation constants of the complexes and ionization potentials of the donors evidence has been obtained on the mixed nature of the donor orbital. The role of inner valence orbitals in the complex formation is also discussed.