Browsing by Author "Aloisi, Gian Gaetano"

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    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, Salvatore
    Charge 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.