Abstract The hydrolysis of some p-substituted triphenylsilanes in the presence of tetrabutyl- ammonium hydroxide has been investigated in various water-acetonitrile media with the aim of comparing the results with those already published for triphenylsilane. It appears that the initial rate is first order with respect to both silane and base whereas the order during the time is not constant for some silanes, depending on the water composition. The second ...