898555-64-1Relevant academic research and scientific papers
On the reactivity of [IrCl(N2)(PPh3)2] with alkynylsilanes - A new route to vinylidene iridium(I) complexes
Konkol, Marcin,Steinborn, Dirk
, p. 2839 - 2845 (2006)
The iridium dinitrogen complex [IrCl(N2)(PPh3)2] (1) was found to react with alkynylsilanes RC ce:glyph() CSiR3′ to form the vinylidene iridium(I) complexes trans- [ IrCl { ce:glyph() C ce:glyph() CR ( SiR3′ ) } ( PPh3 )2 ] (R/R′ = Ph/Me, 2; Me/Me, 3; Bn/Me, 4; SiMe3/Me, 5; SiEt3/Et, 6; iPr/Me, 7) and with Me3SiC{triple bond, long}CC(O)R to yield the iridium η2-alkyne complexes trans-[IrCl{η2-Me3SiC{triple bond, long}CC(O)R}(PPh3)2] (R = OEt, 9; Me, 11). Complex 9 was found to isomerize upon heating or upon UV irradiation yielding the vinylidene complex trans-[IrCl{{double bond, long}C{double bond, long}C(SiMe3)CO2Et}(PPh3)2] (10). The reaction of 1 with Me3SiC{triple bond, long}C{single bond}C{triple bond, long}CSiMe3 yielded the complex trans-[IrCl{{double bond, long}C{double bond, long}C(SiMe3)C{triple bond, long}CSiMe3}(PPh3)2] (8), whereas with MeO2CC{triple bond, long}CCO2Me the iridacyclopentadiene complex [Ir{C4(CO2Me)4}Cl(PPh3)2] (13) was formed. The complexes were characterized by means of 1H, 13C and 31P NMR spectroscopy as well as by IR spectroscopy and microanalysis.
