title: Step-by-step introduction of silazane moieties at ruthenium: different extents of Ru-H-Si bond activation.
abstract: The coordination of pyridine-2-amino(methyl)dimethylsilane ligands to ruthenium has afforded access to a family of novel complexes that display multicenter Ru-H-Si interactions according to the number of incorporated ligands. The new complexes Ru[κ-Si,N-(SiMe2)N(Me)(C5H4N)](η(4)-C8H12)(η(3)-C8H11) (1), Ru2(μ-H)2(H)2[κ-Si,N-(SiMe2)N(Me)(C5H4N)]4 (2), and Ru(H)[κ-Si,N-(SiMe2)N(Me)(C5H4N)]3 (3) were isolated and fully characterized. The complexes exhibit different degrees of Si-H activation: complete Si-H cleavage, secondary interactions between the atoms (SISHA), and η(2)-Si-H coordination. Reversible protonation of 3 leading to the cationic complex [RuH{(η(2)-H-SiMe2)N(Me)κ-N-(C5H4N)}{κ-Si,N-(SiMe2)N(Me)(C5H4N)}2](+)[BAr(F)4](-) (5) was also demonstrated. The coordination modes in these systems were carefully studied with a combination of X-ray and neutron diffraction analysis, DFT geometry optimization, and multinuclear NMR spectroscopy.
authors: LCC (Laboratoire de Chimie de Coordination), CNRS, 205 Route de Narbonne, F-31077 Toulouse, France.
authors: Katharine A
authors: KA
authors: Smart
authors: Mary
authors: M
authors: Grellier
authors: Laure
authors: L
authors: Vendier
authors: Sax A
authors: SA
authors: Mason
authors: Silvia C
authors: SC
authors: Capelli
authors: Alberto
authors: A
authors: Albinati
authors: Sylviane
authors: S
authors: Sabo-Etienne
mesh_terms: D018360:Crystallography, X-Ray; D008958:Models, Molecular; D008968:Molecular Conformation; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D017646:Organosilicon Compounds / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*
chemical_list: D009942:Organometallic Compounds; D017646:Organosilicon Compounds; D012428:Ruthenium