In 2022,Nagyhazi, Marton; Lukacs, Adam; Turczel, Gabor; Hancsok, Jeno; Valyon, Jozsef; Benyei, Attila; Keki, Sandor; Tuba, Robert published an article in Angewandte Chemie, International Edition. The title of the article was 《Catalytic Decomposition of Long-Chain Olefins to Propylene via Isomerization-Metathesis Using Latent Bicyclic (Alkyl)(Amino)Carbene-Ruthenium Olefin Metathesis Catalysts》.Reference of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium The author mentioned the following in the article:
One of the most exciting scientific challenges today is the catalytic degradation of non-biodegradable polymers into value-added chem. feedstocks. The mild pyrolysis of polyolefins, including high-d. polyethylene (HDPE), results in pyrolysis oils containing long-chain olefins as major products. In this paper, novel bicyclic (alkyl)(amino)carbene ruthenium (BICAAC-Ru) temperature-activated latent olefin metathesis catalysts, which can be used for catalytic decomposition of long-chain olefins to propylene are reported. These thermally stable catalysts show significantly higher selectivity to propylene at a reaction temperature of 75°C compared to second generation Hoveyda-Grubbs or CAAC-Ru catalysts under ethenolysis conditions. The conversion of long-chain olefins (e.g., 1-octadecene or Me oleate) to propylene via isomerization-metathesis is performed by using a (RuHCl)(CO)(PPh3)3 isomerization co-catalyst. The reactions can be carried out at a BICAAC-Ru catalyst loading as low as 1 ppm at elevated reaction temperature (75°C). The observed turnover number and turnover frequency are as high as 55 000 and 10 000 molpropylene molcatalyst-1 h-1, resp. The experimental process involved the reaction of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium(cas: 172222-30-9Reference of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium)
Benzylidenebis(tricyclohexylphosphine)dichlororuthenium(cas: 172222-30-9) is the first metathesis catalyst to be widely used in organic synthesis. It is useful for acyclic diene metathesis polymerization (ADMET), Ring-Opening Metathesis Polymerization (ROMP) of strained cyclic olefins, ring opening metathesis (ROM), and so on.Reference of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics