Abstract

The thermodynamic and spectrophotometric properties of the hexamethylbenzene—iodine charge—transfer complex in different donor solvents such as benzene, toluene, xylene ( o-, m-, p-) and mesitylene are found to depend on the solvent. The results show that the oscillator strengths of the charge—transfer bands of the hexamethylbenzene—iodine complex in these donor solvents increase with the heats of formation but these values of oscillator strengths are found comparatively high in comparison with the results observed earlier in inert solvents. The charge—transfer interaction of donor solvents with iodine is responsible for changing both thermodynamic as well as spectrophotometric properties of the hexamethylbenzene—iodine complex. An attempt is made to calculate the thermodynamic and spectrophotometric properties of these complexes free from other interaction.

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