475635-32-6

Basic information

• Product Name: Cp(PMePh₂)2RuSiCl₃
• CAS NO: 475635-32-6
• Molecular Weight: 701.049
• Mol File: 475635-32-6.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: Cp(PMePh₂)2RuSiCl₃(CAS DataBase Reference)
• NIST Chemistry Reference: Cp(PMePh₂)2RuSiCl₃(475635-32-6)
• EPA Substance Registry System: Cp(PMePh₂)2RuSiCl₃(475635-32-6)

Safety Data

• Hazardous Substances Data: 475635-32-6(Hazardous Substances Data)

Upstream product

• 114674-46-3 (η5-cyclopentadienyl)methylbis(methyldiphenylphosphine)ruthenium 
• 10025-78-2 trichlorosilane 

Relevant articles and documents

Effect (or lack thereof) of ancillary groups on the preparation and spectroscopic properties of ruthenium silyl complexes containing the Cp(PR3)2Ru moiety

The preparation and characterization of Cp(PR3)2RuSiX3 [PR3 = PPhMe2, SiX3 = SiCl3 (1), SiHCl2 (2), SiH2Cl (3), SiHMeCl (4), SiH3 (7), SiMeH2 (8), SiMe3 (9); PR3 = PPh2Me, SiX3 = SiCl3 (10), SiHCl2 (5), SiH2Cl (6), SiMeCl2 (11)] are described. Ruthenium silyl complexes 1-6 are prepared by the reaction of the ruthenium hydrides, Cp(PR3)2RuH, with the corresponding chlorosilane, ClSiX3; the ruthenium dihydrides [Cp(PR3)2RuH2]Cl were obtained as coproducts. Increasing the steric demand of the phosphine decreased the reactivity of the corresponding ruthenium hydride toward chlorosilanes. Silyl complexes 1-4 undergo chloride/hydride exchange with LiAlH4 to give the corresponding ruthenium hydrosilyl complexes Cp(PPhMe2)2RuSiHX2 [SiHX2 = SiH3 (7), SiMeH2 (8)]. Methylation of 1 with AlMe3 produces Cp(PPhMe2)2RuSiMe3 (9). Complexes 10 and 11 were prepared by the reaction of Cp(PPh2Me)2RuMe with neat hydrosilanes HSiX3 (SiX3 = SiCl3, SiMeCl2) at 100 °C. The effects of the silicon substituents on the spectroscopic properties of 1-11 and the related Cp(PMe3)2RuSiX3 complexes were examined as a function of Tolman's electronic parameter (χi) for the substituents on silicon. The NMR resonance PR3 δ(31P) and the NMR coupling constants, 1JSiH and 2JSiP, exhibit a linear relationship with ∑χi(SiX3). On the other hand, the silyl groups differentiated into three classes, dichlorosilyl, monochlorosilyl, and non-chlorosilyl , when the NMR resonances SiX3 δ(29Si), SiH δ(1H), and SiMe δ(13C) were examined as a function of ∑χi(SiX3). This chloro effect was attributed to Ru-Si silylene character from d(Ru)-*(Si-Cl) π-back-bonding interactions. Surprisingly, changing the phosphine attached to ruthenium had no effect on the spectroscopic properties of the silyl group.