Application In Synthesis of Benzylidenebis(tricyclohexylphosphine)dichlororutheniumIn 2022 ,《Polymers from organosilicon derivatives of 5-norbornene-2-methanol for membrane gas separation》 appeared in Polymer. The author of the article were Adreyanov, Fedor A.; Alentiev, Dmitry A.; Lunin, Artyom O.; Borisov, Ilya L.; Volkov, Alexey V.; Finkelshtein, Eugene Sh; Ren, Xiang-Kui; Bermeshev, Maxim V.. The article conveys some information:
In this work, we have proposed a new strategy to the synthesis of norbornene-type monomers with Si-O-C structural motifs via a straightforward and selective dehydrogenative addition reaction between 5-norbornene-2-methanol and trialkylsilanes. As a result, a set of monomers with various trilalkylsiloxy groups (alkyl – CH3, C2H5, and n-C3H7) was synthesized with the yields of 89-90%. These monomers exhibited a high reactivity in both metathesis and vinyl-addition polymerization, affording high-mol.-weight products in yields up to 90%. The metathesis polymers were rubbery with glass transition temperatures from -29 to +23°C, while related isomeric vinyl-addition polynorbornenes were glassy polymers. Permeability (P) and diffusion (D) coefficients for these polymers were systematically evaluated for permanent gases (He, H2, O2, N2, and CO2) and C1-C4 alkanes. Studying their gas transport properties allowed to establish new structure-property relationships. Particularly, the length of alkyl fragments in trilalkylsiloxy group affected differently gas permeability of metathesis (rubbery) and vinyl-addition (glassy) polymers. Besides, it was shown that the method of linking the Si-O-C-containing group to the main chains of polymers played very important role: Alk3SiO-substituted polynorbornenes are more permeable than isomeric (AlkO)Alk2Si-substituted ones. For the metathesis polynorbornenes, P(CO2) were in the range of 152-226 Barrer, and ideal selectivity (α) of CO2/N2 – 13-16; for the vinyl-addition polynorbornenes, P(CO2) = 230-500 Barrer, and α(CO2/N2) = 14-17. Among studied polymers, promising results for ethane/methane separation was demonstrated by metathesis polynorbornene bearing tri(n-propyl)siloxymethyl substituents: P(C2H6) = 138 Barrer and α(C2H6/CH4) = 2.4. The obtained polymers were also characterized by using TGA, WAXD, and nitrogen adsorption-desorption methods. 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 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 In Synthesis of Benzylidenebis(tricyclohexylphosphine)dichlororuthenium
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Chloride – Wikipedia,
Chlorides – an overview | ScienceDirect Topics