Reaction of Cp*RuCl(PPh3)2 with dioxygen and formation of a neutral complex Cp*RuCl(O2)(PPh3)

Combinatorial Catalysis with Bimetallic Complexes: Robust and Efficient Catalysts for Atom‐Transfer Radical Additions

“…A surprising discovery was that for catalysts 4 and 5 , reactions performed in “wet” chloroform and toluene gave better results than those performed in thoroughly dried solvents (entries 7–12). This is in sharp contrast to reactions catalyzed by [RuCl 2 (PPh 3 ) 3 ] or by the very sensitive17 [Cp*RuCl(PPh 3 ) 2 ], for which traces of water were found to reduce the catalytic activity significantly (entries 11 and 12).…”

Synthesis and characterisation of tetramethylfulvene complexes of ruthenium

“…6 There are also some examples with rhenium, such as the complex [Re(CO) 2 (η 6 -C 5 Me 4 CH 2 )(C 6 F 5 )], 7 or with iridium, like [Ir(dppe)Me(η 6 9 (NHC = 1,3-N,N-dimethylimidazol-2-ylidene). However, there are few examples of tetramethylfulvene complexes of ruthenium reported in the literature, [10][11][12][13][14][15][16] such as the dimer [RuCl 2 (η 6 -C 5 Me 4 CH 2 )] 2 , obtained from [RuCp*Cl 2 ] 2 (Cp* = pentamethylcyclopentadienyl), [12][13][14] or the compound [RuCl(η 2 -t BuNSPh)(η 6 -C 5 Me 4 CH 2 )], 15 and they normally form under the influence of strong bases or high temperatures, by abstraction of one of the methyl hydrogens in the Cp* group.…”

In situ‐generated Ru(III)‐mediated ATRP from the polymeric Ru(III) complex in the absence of activator generation agents

“…Despite the fact that the half‐metallocene complex Cp*RuCl (PPh 3 ) 2 is known to be a highly active catalyst for ATRP reactions, the resulting oxidation problem due to its air sensitivity was obstacle to commercialization 25. This promoted us to investigate the ruthenium system as the next application of the GAMA system using Cp*RuCl 2 (PPh 3 ) directly as an oxidatively stable Ru(III) compound26 instead of low oxidation state Ru(II) complex.…”