title: Synthesis of Metallacycles by Oxidative Addition of Sn-S, Sn-Se, Sn-Te, and Ge-Te Containing Precursors to Platinum(II).
abstract: The first metallacycles formed by oxidative addition of tin-sulfur, tin-selenium, tin-tellurium, and germanium-tellurium bonds to platinum(II) are reported. In particular, the ring compounds [(R(2)SnE)(3)], where R = Me, Ph and E = Se, Te, and the new compound [(Me(2)GeTe)(3)], react with [PtMe(2)(bu(2)bpy)] (bu(2)bpy = 4,4'-di-tert-butyl-2,2'-bipyridine) to give the new organoplatinum(IV) metallacycles [PtMe(2)(R(2)SnE)(2)(bu(2)bpy)] and [PtMe(2)(Me(2)GeTe)(2)(bu(2)bpy)], respectively. The tin-containing metallacycles complexes can undergo exchange of either the R(2)Sn or the E groups by reaction with [(R'(2)SnE)(3)] or [(R(2)SnE')(3)], respectively, to give the corresponding new metallacycles of general formula [PtMe(2)(R(2)SnE-R'(2)SnE)(bu(2)bpy)] or [PtMe(2)(R(2)SnE-R(2)SnE')(bu(2)bpy)]. The isostructural series of complexes [PtMe(2)(Ph(2)SnE)(2)(bu(2)bpy)] with E = S, Se, and Te have been characterized by X-ray structure determinations. It is shown that (119)Sn NMR is a useful method of structure determination for these metallacyclic compounds.
authors.affiliation: Department of Chemistry, The University of Western Ontario, London, Ontario, Canada, N6A 5B7.
authors.forename: Michael C.
authors.initials: MC
authors.lastname: Janzen
authors.forename: Hilary A.
authors.initials: HA
authors.lastname: Jenkins
authors.forename: Louis M.
authors.initials: LM
authors.lastname: Rendina
authors.forename: Jagadese J.
authors.initials: JJ
authors.lastname: Vittal
authors.forename: Richard J.
authors.initials: RJ
authors.lastname: Puddephatt