Synthesis and properties of di(polyfluoroalkyl) peroxydicarbonates
摘要:
Synthesis of di(polyfluoroalkyl)peroxydicarbonates [X(CF(2)) (n) CH(2)OC(O)O](2), where X = H, F; n = 1, 2, 4, 6 (yield 80%) involves the step of the chloroformate formation (yield up to 93%) via the phosgenation of polyfluorinated alcohols followed by the reaction with sodium peroxide. The rate constant of monomolecular decomposition k (term) was found to decrease as the polyfluoroalkyl groups were incorporated into the peroxide: it equaled 3.30 and 3.10 s(-1) for X = H, n = 2 and 4, respectively, and 7.36 s(-1) for di-n-butylperoxydicarbonate. The new peroxides are a source of the polyfluoroalkoxy radicals and nano-modifiers of the polymers to improve their heat resistance and light stability.
Catalytic synthesis of polyfluoroalkyl chloroformates
作者:A. I. Rakhimov、L. A. Butkovskaya、A. V. Baklanov
DOI:10.1134/s1070363208050289
日期:2008.5
Metal Halide Catalyzed Ortho Ester Formation<sup>1a,b</sup>
作者:Marion E. Hill、Daniel T. Carty、Derek Tegg、Janis C. Butler、Albert F. Stang
DOI:10.1021/jo01013a025
日期:1965.2
US4022609A
申请人:——
公开号:US4022609A
公开(公告)日:1977-05-10
Synthesis and properties of di(polyfluoroalkyl) peroxydicarbonates
作者:A. I. Rakhimov、L. A. Butkovskaya
DOI:10.1134/s1070363211050100
日期:2011.5
Synthesis of di(polyfluoroalkyl)peroxydicarbonates [X(CF(2)) (n) CH(2)OC(O)O](2), where X = H, F; n = 1, 2, 4, 6 (yield 80%) involves the step of the chloroformate formation (yield up to 93%) via the phosgenation of polyfluorinated alcohols followed by the reaction with sodium peroxide. The rate constant of monomolecular decomposition k (term) was found to decrease as the polyfluoroalkyl groups were incorporated into the peroxide: it equaled 3.30 and 3.10 s(-1) for X = H, n = 2 and 4, respectively, and 7.36 s(-1) for di-n-butylperoxydicarbonate. The new peroxides are a source of the polyfluoroalkoxy radicals and nano-modifiers of the polymers to improve their heat resistance and light stability.