Process for the production of monoalkyltin trihalides

C - Chemistry – Metallurgy – 07 – F

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C07F 7/22 (2006.01)

Patent

CA 2435358

The present invention is directed to a process for the production of monoalkyltin trihalides of the formula RSnX3 wherein R-alkyl or cycloalkyl and X-C1, Br or I, involving a redistribution reaction between tetraorganotins, triorganotin halides or diorganotin halides and tin tetrahalides, said process comprising contacting tetra-(R4Sn), tri-(R3SnX) or diorganotin halides (R2SnX2) with SnX4 to afford said monoorganotin trihalides in the presence of at least one transition metal complex, said complex comprising at least one transition metal, M, selected from Group VIII of the periodic Table of elements, at least one monodentate ligand or bidentate ligand, L, L' or L", and optionally one or more anions, X, of an organic or inorganic acid, as a catalyst or catalyst precursor.

La présente invention concerne un procédé permettant la production de trihalogénures de monoalkyle-étain de formule RSnX¿3? dans laquelle R est alkyle ou cycloalkyle, et X est Cl, Br ou I, comprenant une réaction de redistribution entre des tétraorgano-étains, des halogénures de triorgano-étain, ou des halogénures de diorgano-étain et des tétrahalogénures d'étain. Ledit procédé comprend la mise en présence de tétra-(R¿4?Sn), de tri-(R¿3?SnX) ou d'halogénures de diorgano-étain (R¿2?SnX¿2?) avec SnX¿4? pour permettre la production desdits trihalogénures de monoorgano-étain en la présence d'au moins un complexe à métaux de transition, ledit complexe comprenant au moins un métal de transition (M) choisi parmi le groupe VIII du tableau périodique des éléments, au moins un ligand monodentate ou ligand bidentate (L, L' ou L''), et éventuellement un ou plusieurs anions (X) d'un acide organique ou minéral, en tant que catalyseur ou que précurseur de catalyseur.

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