RuCl2

Other catalysts that have been used to isomerize allylic ethers are Polystyrene-CH2NMe3-RhCl4 (EtOH, H20), RuCl2(PPh)3 (NaBH... 

Square pyramidal [Fe(0AsMe3)4(C104)]+ [RuCl2(PPh3)3]... 

Thermal arene exchange of tetramethylthiophene with [(/ -cymene)RuCl2]2 affords 130 (89JA8828), which on reaction with AgBE4 and excess tetramethylthiophene yields 131. The Ru—S thiophenic cluster, 132, was synthesized by reaction of 130 with (Mc3Si)2S followed by anionic metathesis and formation of the PFg salt. The coordination geometry around each ruthenium atom is pseudooctahedral. 

RuCl2(PPh3)2 reacts with 4-R2P-dibenzothiophene (R = Ph, p-Tol) and forms 303, in which the dibenzothiophene ligand is coordinated to ruthenium via the phosphorus and sulfur atoms [84JA5379, 87JOM(318)409]. The donor ability of the sulfur atom is relatively weak. Complex 303 (R = Ph) is able to add carbon monoxide and yield the monocarbonyl adduct. 

Dimesitylimidazolium chloride in the presence of potassium tert-butylate reacts with [RuCl2(PCy3)2(=CHPh)] or [RuCl2(PCy3)2(=CHCH=CMe2)] to yield the mixed phosphine-carbene complexes [RuCL(L)(PCy3)(=CHPh)] or... 

Imidazole with [(T -C Hg)RuCl2]2 in the presence of sodium methylate gives most probably the tetrameric [(T) -C Hg)RuCl(p-im)]4 where the imidazolate anion performs the N, A -bridging function (93ICA(206)15). 

A mixture of the sodium salts of P2C3-t-BuJ and P3C2-t-Bu2 with [( -cod)RuCl2] gives the sandwich 119, while with [(j -QH6)RuCl2(PPh3)], the derivative 120 is formed (93JOM(462)319). 

Dupont et al. were able to obtain up to 80 % ee in the conversion of 2-phenyl-acrylic acid into (S)-2-phenylpropionic acid with the chiral [RuCl2(S)-BINAP]2NEt3 complex as catalyst in [BMIM][Bp4] melts (Scheme 5.2-9) [54]. 

Table 5 indicates that RuCl2(PPh3)3 has been frequently used for selective hydrogenation of C=C in NBR [48-52]. This is commercially available and is also easy to synthesize. In most of the patented processes, low-molecular weight ketone solvents are used to avoid the gel formation. The activity of the catalyst can be enhanced by the use of certain additives, such as trieth-ylamine [59], isopropanol [52], and ammonium hexaflu-orophosphate [50] in the reaction system. This might be... 

Figure 1.23 Syntheses of complexes of other tertiary phosphines by metathesis of RuCl2(PPh3)3.

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