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Synthesis of monoorganotin(IV) chloride complexes of <i>cis</i>-1,2-bis(diphenylphosphino)ethylene: Solution and solid state structures
Auteur(s)
Date de parution
2007
In
Journal of Organometallic Chemistry, Elsevier, 2007/692/11/2168-2174
Résumé
Organotin(IV) complexes of the type [RSnCl<sub>3</sub> (<i>cis-Ph<sub>2</sub>PCH=CHPPh<sub>2</sub></i>)] [R = Me (<b>1</b>), <sup><i>n</i></sup>Bu (<b>2</b>), Ph (<b>3</b>)] were prepared by the reaction of RSnCl<sub>3</sub> with the rigid bisphosphine ligand, <i>cis</i>-1,2-bis(diphenylphosphino)ethylene in dichloromethane. The complexes have been characterized both in solution and the solid state. Low temperature <sup>31</sup>P and <sup>119</sup>Sn NMR studies indicate two different phosphorus environments. The crystal structures indicate a weak but chelating mode of coordination of the two phosphorus atoms to tin, leading to a distorted octahedral geometry. In solution the complexes <b>1–3</b> undergo a redistribution reaction to form [SnCl<sub>4</sub> (<i>cis-Ph<sub>2</sub>PCH=CHPPh<sub>2</sub></i>)] (<b>4</b>) as one of the products. In order to confirm the redistribution, complex <b>4</b> has been prepared separately and characterized both structurally and spectrally.
Identifiants
Type de publication
journal article
