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Item Molecular complexes of substituted aryl diphenylmethyl sulphides with π-acceptors: Charge transfer spectra and ionization potentials of the donors(Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1977, 73 (1), 1977) Reichenbach, Gustavo; Santini, Sergio; Aloisi, G. GaetanoCharge transfer complexes of substituted aryl diphenylmethyl sulphides, X1C6H4(X2C6H4) CH—S—C6H4Y, with tetracyanoethylene, 2,3-dichloro-5,6-dicyano-p-benzoquinone and chloranil have been studied spectrophotometrically. The energy of the charge transfer transition is influenced by the substituents in Y, but is not affected by the substituents in X. The ionization potentials calculated from the energy of charge transfer transitions are in good accord with those measured by photoelectron spectroscopy. The nature of the donor orbitals is also discussed.Item Molecular complexes of substituted diphenyl sulphides with π acceptors. Charge transfer spectra and ionization potentials of the donors(Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1974, 70 (10), 1974) Aloisi, G. Gaetano; Santini, Sergio; Sorriso, SalvatoreCharge 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.Item Molecular complexes of substituted thiophens with σ and π acceptors: Charge transfer spectra and ionization potentials of the donors(Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1973, 69 (3), 1973) Aloisi, Gian Gaetano; Pignataro, SalvatoreCharge transfer complexes of substituted thiophens as donors with tetracyanothylene, 2,3-dichloro-5,6-dicyano-p-benzoquinone, chloranil and iodine have been studied spectrophotometrically. From the energies of the charge transfer transitions, the ionization potentials of the donors have been obtained. Comparison with those measured by electron-impact mass spectrometry, shows that the thiophens behave as π donors with all four acceptors. In the case of iodine the stability constants of the complexes support a π→σ* interaction. Some evidence is given for the role of inner valence orbitals in the complexes.