Hydrolysis of diphenylmethyltin(iv) chloride in different aqueous solutions of ethanol

Abstract

The hydrolysis of [(Ph)2MeSn(IV)]+ has been studied spectrophotometrically at 25ˆC and constant ionic strength of 0.1 mol dm−3 sodium perchlorate. Over a wide pH range, 1–11, the investigation has been performed in different aqueous solutions of ethanol. The species formed together with their formation constants have been determined using the computer program Squad. The hydrolysis constants at different media were analyzed in terms of Kamlet and Taft's parameters. A single-parameter correlation of the formation constants, K1-1 and K1-2, versus α (hydrogen-bond donor acidity), β (hydrogen-bond acceptor basicity), and π* (dipolarity/polarizability) for both cases are relatively poor in all solutions, but multiparameter correlation represents significant improvement with regard to the single-parameter models. In this work, we have also used the normalized polarity parameter, E, alone and in combination with the Kamlet–Taft's parameters to find a better correlation of the formation constants in different aqueous solutions of ethanol. © 2008 Wiley Periodicals, Inc. Heteroatom Chem 19:654–660, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/hc.20484