Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. 246047-72-3, C46H65Cl2N2PRu. A document type is Article, introducing its new discovery., Application In Synthesis of (1,3-Bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene)dichloro(phenylmethylene)(tricyclohexylphosphine)ruthenium
First Detection of a Ruthenium?Carbene?Resorc[4]arene Complex During the Progress of a Metathesis Reaction
For the first time we describe the detection of a ruthenium-carbene-resorc[4]arene complex produced, as a key intermediate, during an olefin metathesis reaction carried out on a resorc[4]arene bicyclic olefin with [Ru(=CHPh)Cl2(PCy3)2] Grubbs first-generation (G1ST) catalyst. The complex was identified by using high-resolution (600 MHz) 1H, 31P NMR and DOSY spectroscopy, in a non-invasive fashion. The singlet at delta = 19.98 ppm (1H NMR), attributed to the alkylidene proton in the G1ST catalyst and that at delta = 53.37 ppm (31P NMR), attributed to the phosphorus atom coordinated with the metal, were selected as probes for a kinetic analysis. The intensity of these signals decreased at the expense of the singlets at 19.26 (1H NMR) and 52.68 ppm (31P NMR), diagnostic for the formation of the ruthenium-carbene-resorc[4]arene complex 3a[Ru]. The resorc[4]arene activated olefin proved to behave as a key propagating species leading to oligomers according to a ROMP pathway.
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Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI