PROCESS FOR THE PREPARATION OF MONOALKYL TIN TRIHALIDES AND DIALYL TIN DIHALIDES

摘要

The present invention relates to a process for the production of monoalkyltin trihalides of the formula RSnHal3, in which R = alkyl or cycloalkyl and Hal = Cl, Br or I. Said process comprises contacting the corresponding alkene or cycloalkene, stannous halide SnHal2, hydrogen halide HHal and optionally Sn metal, in the presence of at least one transition metal-based catalyst, thereafter isolating the monoalkyltin trihalides from the medium. The present invention also relates to a process for the production of dialkyltin dihalides of the formula R2SnHal2 from monoalkyltin trihalides of the formula RsnHal3', in which R = alkyl or cycloalkyl and Hal= Cl, Br or I. Said process comprises contacting monoalkyltin trihalides RsnHal3 and Sn metal, optionally thereafter isolating the dialkyltin dihalides R2SnHal2 from the medium.