ChemInform Abstract Reaction of the diphenylchlorophosphine aluminum trichloride complex (I) with n-butyl iodide (II) without a solvent followed by aqueous work-up gives the sec-butyl-(III) and the tert-butylphosphine oxide (IV). In the presence of diethyl ether (V) and benzene, however, a mixture of the ethyl-(VI) and the n-butylphosphine oxide (VII) is obtained.

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ChemInform Abstract The complex (I) reacts with benzene (II) and isopropyl chloride (III) to produce the phosphine oxides (IV) and (V). The phosphine oxide (VII) is obtained from (I) and tert-butylbenzene (VI). (Mechanism).