Charge-Transfer Complexes of Benzo[b]thiophene with σ- And π-Electron Acceptors

Article abstract of DOI:10.1246/bcsj.70.2369

The spectrophotometric properties of the charge-transfer (CT) complexes of benzo[6]thiophene with iodine at 24°C in different solvents such as cychlohexane, carbon tetrachloride, chloroform, dichloromethane, and 1,2-dichloroethane are studied. In addition the spectrophotometric and thermodynamic properties of the CT complexes of benzo[b]thiophene with tetracyanoethylene, chloranil, 2,3-dichloro-5,6-dicyano-p-benzoquinone and 7,7,8,8,-tetracyanoquinodimethane are studied. The results show that the equilibrium and the thermodynamic parameters and the wavelengths of the maximum absorption bands (λ_max) of the complexes vary markedly with the solvent. The ionization potential and the donor sites of benzo[b]thiophene are also determined and discussed.