444069-58-3Relevant academic research and scientific papers
Ruthenium acetylide oxidation: From stable radicals to allenylidene synthesis via γ-elimination of H+
Rigaut, Stéphane,Monnier, Florian,Mousset, Fran?ois,Touchard, Daniel,Dixneuf, Pierre H.
, p. 2654 - 2661 (2008/10/08)
Oxidation of ruthenium(II) acetylides trans-[Cl(dppe)2Ru-C≡C-CHR2] (R = H, CH3, Ph) leads to cationic radicals of which the stability is found to be highly influenced by the nature of R. This oxidative process leads to a stable cationic radical (R = CH3, H) or to its rearrangement into a neutral radical, trans-[Cl(dppe)2Ru-C≡C-C.(R)2] for R = Ph. This unprecedented γ-elimination of a proton provides both the allenylidene trans- [Cl(dppe)2Ru= C=C=CR2]PF6 and the vinylidene trans-[Cl(dppe)2Ru=C=CH-CHR2]PF6. The allenylidene can be selectively obtained from the acetylide in the presence of a base.
