《Synthesis of high-molecular weight poly(1,1-dimethyl-1-silapentene) by olefin metathesis polymerization in the presence of Grubbs catalysts》 was written by Morontsev, Alexander; Gringolts, Maria; Lakhtin, Valentin; Finkelshtein, Eugene. Application of 172222-30-9 And the article was included in Journal of Organometallic Chemistry in 2020. The article conveys some information:
Heterochain polycarbosilanes are well-known materials possessed important properties. Some of their applications, such as gas separation membranes, require polymers with high mol. weight that provide good film-forming and mech. properties. In this research, the synthesis of poly(1,1-dimethyl-1-silapentene) via the ring-opening metathesis polymerization (ROMP) of 1,1-dimethyl-1-silacyclopentene and the acyclic dienes metathesis (ADMET) of diallyl dimethylsilane mediated by Ru-carbene Grubbs complexes 1st – 3rd generations as well as Hoveyda-Grubbs 2nd generation catalyst were studied for the first time. High mol. weight poly(1,1-dimethyl-1-silapentene) was synthesized by ROMP of 1,1-dimethyl-1-silacyclopentene. Varying the type and loading catalyst, temperature and monomer concentration, we obtained poly(1,1-dimethyl-1-silapentene) with Mw = 100-143 kDa, which is significantly higher (5-7 times) than that reached previously by olefin metathesis polymerization The activities of 1,1-dimethyl-1-silacyclopentene and cyclopentene in ROMP were compared using 1H NMR monitoring the conversion of their double bonds. The ADMET polymerization of diallyl dimethylsilane led to oligomers with the average polymerization degree not exceeded 4.4. In the part of experimental materials, we found many familiar compounds, such as Benzylidenebis(tricyclohexylphosphine)dichlororuthenium(cas: 172222-30-9Application of 172222-30-9)
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.Application of 172222-30-9
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