Swart, Marthinus R.; Marais, Charlene; Erasmus, Elizabeth published an article in 2021. The article was titled 《Comparison of the Spectroscopically Measured Catalyst Transformation and Electrochemical Properties of Grubbs’ First- and Second-Generation Catalysts》, and you may find the article in ACS Omega.Application In Synthesis of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium The information in the text is summarized as follows:
According to UV-visible spectroscopy (0.10 mM, CH2Cl2 at 25°), the catalyst transformation (which could possibly include ligand dissociation with active catalyst formation, dimer formation, and decomposition) rate constants (kobs) of Grubbs’ 1st (1) and 2nd (2) generation catalysts are 7.48 × 10-5 and 1.52 x 10-4 s-1, resp. From 31P NMR (0.1M, CD2Cl2, at 25°), the catalyst transformation was 5.1% for 1 and 16.5% for 2 after 72 h. However, due to the larger concentrations of the NMR samples compared to the UV-visible samples, the extent of transformation did not correspond. The oxidation potential of the Ru(II)/Ru(III) couple of 2 (E°’ = 27.5 mV at v = 200 mV s-1) was considerably lower than that of 1 (E°’ = 167 mV at v = 200 mV s-1). In the case of 1, a 2nd reduction peak appeared at slow scan rates. This may probably be ascribed to an electrochem. active compound that was formed from the intermediate cation 1•+ and the subsequent reduction of the latter. The oxidation/reduction of 1 proceeds according to an ErCi electrochem. mechanism (Er = electrochem. reversible step, Ci = chem. irreversible step), whereas 2 proceeds according to an ErCr electrochem. mechanism (Er = electrochem. reversible step, Ci = chem. reversible step). The experimental part of the paper was very detailed, including the reaction process of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium(cas: 172222-30-9Application In Synthesis of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium)
Benzylidenebis(tricyclohexylphosphine)dichlororuthenium(cas: 172222-30-9) is a ruthenium-based olefin metathesis catalyst. It is useful for olefin cross metathesis (CM) and ring closing metathesis (RCM) of terminal olefins under a variety of reactions conditions, and so on.Application In Synthesis of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics