Abstract
the thermodynamic and spectrophotometric properties of 1:1 charge-transfer (CT) interaction of aromatic hydrocarbons as electron donors and halomethanes as electron acceptors have been determined from the longest wavelength π → π* absorption bands of aromatic hydrocarbons in heptane solution. The thermodynamic properties of these complexes are linearly related to the ionization potentials of aromatic hydrocarbons and also to the spectral shifts (Δ ν cm −1) due to CT interaction. With the same halomethane, the aromatic hydrocarbons are in the order tetracene > anthracene > tetraphene > dibenzoanthracene and with the same aromatic hydrocarbon, the halomethanes are in the order CCl 4 > CHCl 3 > CH 2Cl 2 on the basis of CT interaction.
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