The Reaction of Triphenylindium with Iodine

Triphenylindium was prepared by the reaction of diphenylmercury with activated indium [9]. Then sublimed iodine (0.95 g, 3.74 mmol) was allowed to react with a 50 ml xylene solution of triphenylindium (3.74 mmol). The mixture was stirred at room temperature the purple color disappeared within seconds. Then the xylene was stripped off until about 20 ml remained and 50 ml of petroleum ether was added. A large amount of white precipitate immediately formed this was filtered in the dry box and dried under vacuum. White crystals of diphenylindium iodide were obtained. 

Cyclohexanone, cyclopentanone, benzaldehyde, / -methylacetophenone, ethyl bromoacetate, and ethyl chloroacetate were obtained from commercial sources. They were used without further purification. Xylene (ortho, 99%) was obtained from Aldrich and distilled over NaAlH4. Diethyl ether (Fisher 

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