WMe6 Tamed by Silica: Si-O-WMe5 as an Efficient, Well-Defined Species for Alkane Metathesis, Leading to the Observation of a Supported W-Methyl/Methylidyne Species

Samantaray, Manoja K.Callens, EmmanuelAbou-Hamad, EdyRossini, Aaron J.Widdifield, Cory M.Dey, RajuEmsley, LyndonBasset, Jean-Marie2015-01-082015-01-082015-01-08201410.1021/ja410747ghttps://infoscience.epfl.ch/handle/20.500.14299/109955WOS:000330202300041The synthesis and full characterization of a well-defined silica-supported :Si-O-W(Me)(5) species is reported. Under an inert atmosphere, it is a stable material at moderate temperature, whereas the homoleptic parent complex decomposes above -20 degrees C, demonstrating the stabilizing effect of immobilization of the molecular complex. Above 70 degrees C the grafted complex converts into the two methylidyne surface complexes [( SiO-)W( CH)Me-2] and [( SiO-)(2)W( CH)Me]. All of these silica-supported complexes are active precursors for propane metathesis reactions.WMe6 Tamed by Silica: Si-O-WMe5 as an Efficient, Well-Defined Species for Alkane Metathesis, Leading to the Observation of a Supported W-Methyl/Methylidyne Speciestext::journal::journal article::research article