title: Silane-isocyanide coupling involving 1,1-insertion of XylNC into the Si-H bond of a σ-silane ligand.
abstract: Complexes [PhBP(Ph)3]RuH(η(3)-H2SiRR') (R,R' = Me,Ph, 1a; RR' = Ph2, 1b) react with XylNC (Xyl = 2,6-dimethylphenyl) to form Fischer carbene complexes [PhBP(Ph)3]Ru(H)═[C(H)(N(Xyl)(η(2)-H-SiRR'))] (2a,b) that feature a γ-agostic Si-H bond. The ruthenium isocyanide complexes [PhBP(Ph)3]Ru(H)(CNXyl)(η(2)-HSiHRR') (6a,b) are not intermediates as they do not convert to 2a,b. Experimental and theoretical investigations indicate that XylNC is activated by initial coordination to the silicon center in 1a,b, followed by 1,1-insertion into an Si-H bond of the coordinated silane and then rearrangement to 2a,b.
authors.affiliation: Department of Chemistry, University of California, Berkeley, California 94720, United States.
authors.forename: Mark C
authors.initials: MC
authors.lastname: Lipke
authors.forename: T Don
authors.initials: TD
authors.lastname: Tilley
mesh_terms: D002244:Carbon / Q000737:chemistry*; D003486:Cyanides / Q000737:chemistry*; D008024:Ligands; D008958:Models, Molecular; D008968:Molecular Conformation; D009584:Nitrogen / Q000737:chemistry*; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D012428:Ruthenium / Q000737:chemistry*; D012821:Silanes / Q000737:chemistry*; D014992:Xylenes / Q000737:chemistry*
chemical_list: D003486:Cyanides; D008024:Ligands; D009942:Organometallic Compounds; D012821:Silanes; D014992:Xylenes; D002244:Carbon; D012428:Ruthenium; C036531:2,6-xylenol; D009584:Nitrogen