A new series of tricyclononene derivatives with two and three silyl groups are successfully synthesized via [2 sigma+2 sigma+2 pi]-cycloaddition of silylethylenes to quadricyclane. The activity of the silylethylenes in the cycloaddition reactions was estimated. (C) 2011 Elsevier Ltd. All rights reserved.
A new series of tricyclononene derivatives with two and three silyl groups are successfully synthesized via [2 sigma+2 sigma+2 pi]-cycloaddition of silylethylenes to quadricyclane. The activity of the silylethylenes in the cycloaddition reactions was estimated. (C) 2011 Elsevier Ltd. All rights reserved.
Highly permeable polymer materials based on silicon-substituted norbornenes
作者:M. L. Gringol’ts、M. V. Bermeshev、A. V. Syromolotov、L. E. Starannikova、M. F. Filatova、K. L. Makovetskii、E. Sh. Finkel’shtein
DOI:10.1134/s0965544110050063
日期:2010.9
An approach to the manufacture of highly permeable polymers based on the synthesis and polymerization of norbornenes, norbornadienes, and tricyclononenes with different numbers and different positions of silicon-containing substituents has been developed. It has been found that these monomers are readily involved in metathesis polymerization yielding high-molecular-mass polymers possessing good filmforming properties. The addition (vinyl) polymerization of norbornenes is a more complex process; however, the product silylated polynorbornenes exhibit a higher gas permeability than the corresponding metathesis polynorbornenes. By the level of the gas-transport parameters, the silylated addition polynorbornenes obtained in the study are grouped with the most advanced high-permeability polymers. It has been shown that the presence of Me3Si substituent groups, their amount, and the main-chain structure are responsible for the enhancement of the gas permeability of polynorbornenes. Thus, a series of polymers with a regularly changing structure has been obtained, a result that makes it possible to reveal the polymer structure-property relations.
A new series of tricyclononene derivatives with two and three silyl groups are successfully synthesized via [2 sigma+2 sigma+2 pi]-cycloaddition of silylethylenes to quadricyclane. The activity of the silylethylenes in the cycloaddition reactions was estimated. (C) 2011 Elsevier Ltd. All rights reserved.