Chemistry Department, Faculty of Science, Assiut University, Assiut, Egypt E-mail : khalafal@aun.edu.eg Manuscript received 24 June 2009, revised 26 October 2009, accepted 9 November 2009 The alkylation of benzene with 1,2-dlphenyl-2-propanol (1) using AlCl3/CH3NO2 catalyst gave a mixture of 1,2,2- (4) and 1,1,2-triphenylpropaue (5) as product alkylates. With 85% H2SO4 catalyst, the product consisted of E-1,2-dlphenylpropene (6) after 2 h of a mixture of 5 and 6 after 18 h. Similar alkylation

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... benzene with 1-ehloro-2,3- dlphenylpropane (2) using AICI3 catalyst gave a mixture consisting of 4, 5 and 6. Finally, alkylation of benzene with 2- methyl-1-pbenyl-2-butanol (3) using AICl3/CH3NO2 gave 2-methyl-1,1-dlphenylbutane (10) as sole product alkylate. The Identities of the products wen confirmed spectroscopically and by comparison with unequivocally prepared samples. Mechanisms are proposed to rationalise the observed results.