In 2022,Nepal, Prabin; Kalapugama, Suneth; Shevlin, Michael; Naber, John R.; Campeau, Louis-Charles; Pezzetta, Cristofer; Carlone, Armando; Cobley, Christopher J.; Bergens, Steven H. published an article in ACS Catalysis. The title of the article was 《Polycationic Rh-JosiPhos Polymers Supported on Phosphotungstic Acid/Al2O3 by Multiple Electrostatic Attractions》.Electric Literature of C43H72Cl2P2Ru The author mentioned the following in the article:
Cationic Rh-JosiPhos complexes were tethered to crowded, ring-opening olefin metathesis (ROMP)-active norbornene groups. These monomers underwent facile, alternating ROMP (alt-ROMP) with cyclooctene as the co-monomer catalyzed by RuCl2(:CHPh)(PCy3)2 to form linear, polycationic copolymers. The polymers were readily absorbed by phosphotungstic acid (PTA) on Al2O3 via multiple electrostatic attractions between the cationic Rh centers in the polymer and the PTA anions on the Al2O3 support. The enantioselective hydrogenation of di-Me itaconate occurred with 100% conversion, 5000 turnovers per run, with up to 96% ee, and without significant Rh leaching over 10 reuses of the catalyst. The results came from multiple reactions, including the reaction of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium(cas: 172222-30-9Electric Literature of C43H72Cl2P2Ru)
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.Electric Literature of C43H72Cl2P2Ru
Referemce:
Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics