Infrared Studies of Solutions Involving Aromatics and Halogens

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Abstract
Infrared studies were made in the region 640—1400 cm—1 to investigate the effect of adding iodine to benzene, toluene, mesitylene, hexamethylbenzene, naphthalene, cyclohexane, and methylcyclohexane. Spectral changes were observed for each of the aromatics except for naphthalene. The enhancement of the mesitylene band at 1300 cm—1 was observed for mesitylene purified in five distinct ways. The enhancement of the hexamethylbenzene band at 1298 cm—1 was studied as a function of the concentrations in carbon disulfide solutions and correlates with the product of hexamethylbenzene and iodine concentrations. The effect of bromine on the spectrum of benzene was noted also. The results can be discussed in terms of weak complex formation or strong solvent perturbations.

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