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Complex trans- Ru

Noyori et al. recently used ESI-MS to characterize species present in catalytically active solutions during the hydrogenation of aryl-alkyl ketones using their base-free catalyst precursors trans-[Ru((R)-tol-BINAP)((R, RJ-dpenJfHXf/ -BH ] (tol-BI-NAP = 2,2 -bis(ditolylphosphino) -1, T-binaphthyl dpen = 1,2-diphenylethylenedia-mine) in 2-propanol [9b]. Based upon ESI-MS observations, deuterium-labeling studies, kinetics, NMR observations, and other results, the authors proposed that the cationic dihydrogen complex trans-[Ru((R)-tol-BINAP)((R, R)-dpen)(H)( 2-H2)]+ is an intermediate in hydrogenations carried out in the absence of base. [Pg.367]

The 16-electron nitrosyl complex trans-Ru(NO)[P(Ph)3]2Cl is a rare example of a coordinately unsaturated Ru(I) complex reaction with CH3I or CjHjCHjCl yields the products of a cis-addition of RX . The structure of the oxidative addition products I and II ... [Pg.148]

The readily prepared and air-stable complex trans-[Ru(salen)(N0)(H20)](SbF6), when added (1 mol %) to Diels-Alder reactions in nitromethane, leads to acceleration by as much as 10. The presence of water slows the reaction, but does not inhibit it. The Ru catalyst is 1 or 2 orders of magnitude more efficient in catalyzing these reactions than trifluoroacetic acid (Sch. 51) [190]. Asymmetric versions of the Ru methodology have not appeared in the literature but chiral oxo(salen)Mn(V) complexes show some promise the results of the best (of ten compoimds tested) are included in Sch. 51 [191]. [Pg.639]

Figure 21.18 compares experimental H solid echo NMR spectra and the simulated H FID-NMR spectra of the RU-D2 complex trans-[Ru(D2)Cl(dppe)2[PFg (Ru-D2). At temperatures below 10 K the singularities of a satellite Pake pattern are visible as a splitting of the spectra at 60 kHz. This satellite Pake pattern is the... [Pg.671]

As a first experimental example. Fig. 21.19 displays the result of the Tj measurements on the same RU-D2 complex trans-[Ru(D2)Cl(dppe)2 PF6 (RU-D2) as above. Due to the low sensitivity of the sample the spin-lattice relaxation rates were measured only at some selected temperatures. The lowest Tj value (0.12 0.02 s) was found at 97 K. At low temperatures the Tj data show strong deviations from simple Arrhenius behavior. [Pg.673]

Scheme 1. Steps in the heterolytic cleavage of dihydrogen on Ru(II) starting with the complex trans-Ru(0S02CF3)(CN)(dppe)2. Scheme 1. Steps in the heterolytic cleavage of dihydrogen on Ru(II) starting with the complex trans-Ru(0S02CF3)(CN)(dppe)2.
Complex formation between Ru and ligand (12) has been investigated [Ru(12)3] is easily prepared and can be oxidized to the corresponding Ru complex. Substitution by PPh3, py, or im (L) occurs very slowly, and in [Ru (12)3] , it occurs with concomitant reduction to yield trans- [Ru(12)2L2]-. ... [Pg.563]

Complexes of the type [Ru(bpy)2L2L in which L is a simple, monodentate ligand will be surveyed first. The structure of tra 5-[Ru(bpy)2(H20)2][PF6]2 has been determined steric inter actions result in the bpy ligands being bowed .Similar deformations are observed in trans [Ru(bpy)2(MeCN)2] " and tra 5-[Ru(bpy)2(NH3)2]... [Pg.583]

See other pages where Complex trans- Ru is mentioned: [Pg.356]    [Pg.585]    [Pg.627]    [Pg.771]    [Pg.68]    [Pg.300]    [Pg.391]    [Pg.600]    [Pg.599]    [Pg.248]    [Pg.719]    [Pg.391]    [Pg.3845]    [Pg.52]    [Pg.96]    [Pg.356]    [Pg.585]    [Pg.627]    [Pg.771]    [Pg.68]    [Pg.300]    [Pg.391]    [Pg.600]    [Pg.599]    [Pg.248]    [Pg.719]    [Pg.391]    [Pg.3845]    [Pg.52]    [Pg.96]    [Pg.204]    [Pg.60]    [Pg.176]    [Pg.194]    [Pg.631]    [Pg.57]    [Pg.380]    [Pg.120]    [Pg.90]    [Pg.250]    [Pg.179]    [Pg.360]    [Pg.362]    [Pg.368]    [Pg.568]    [Pg.571]    [Pg.573]    [Pg.573]    [Pg.574]    [Pg.586]    [Pg.655]    [Pg.665]    [Pg.667]    [Pg.674]    [Pg.677]    [Pg.682]    [Pg.698]    [Pg.774]   
See also in sourсe #XX -- [ Pg.2 , Pg.6 , Pg.671 ]



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Ru -complexes

Trans complexation

Trans-Ru

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