Electric Literature of 246047-72-3, Chemistry can be defined as the study of matter and the changes it undergoes. You’ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.246047-72-3, Name is (1,3-Bis(2,4,6-trimethylphenyl)-2-imidazolidinylidene)dichloro(phenylmethylene)(tricyclohexylphosphine)ruthenium, molecular formula is C46H65Cl2N2PRu. In a patent, introducing its new discovery.
Electrospray ionization mass spectrometry (ESI-MS) and subsequent MS/MS methods were used to study second-generation Grubbs catalysts 2 and 3 and first- and second-generation Hoveyda-Grubbs catalysts 4 and 5, respectively, as well as the pyridine-tethered Ru carbene catalyst 6. Direct ESI-MS analyses of Ru catalysts 2-6 showed the corresponding radical cations 2?+- 6?+ and the protonated ligand PCy3 and H 2IMes, respectively. Alkali metal adduct ions 2?M+ and 3?M+ (M = Li, Na, K, Cs) and 4?M+- 6?M+ (M = Li, K) could be easily obtained by mixing the CH 2Cl2 solution of catalysts 2-6 with the CH3OH solution of alkali-metal chloride using an online microreactor coupled directly to the electrospray ion source of a quadrupole time-of-flight (Q-TOF) mass spectrometer and were studied by collision-induced dissociation (CID). Remarkably, the alkali metal cationized 14-electron Ru complexes 2a?M + and 3a?M+ formed by dissociation of phosphine from 2 and 3, respectively, were detected directly from solution. The ratio [2a?M+]/[2?M+] increased with decreasing Lewis acidity of M+ from Li+ to Cs+. Moreover, theoretical computations were performed on Ru complexes 2, 5, and 6, showing good agreement with experimental X-ray diffraction data and providing more structural information about the alkali metal adduct ions 2?M+, 5?M+, and 6?M+ (M = Li, K) as well as about the 14-electron species 2a, 5a, and 6a and the respective alkali metal adduct ions.
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Reference：
Highly efficient and robust molecular ruthenium catalysts for water oxidation,
Catalysts | Special Issue : Ruthenium Catalysts – MDPI