give information relating to mechanism of cross-linking of the polymer and indications of factors that limit its working life. Novel use of SbF5 for dehydrofluorination in synthesis of fluorinated mono-enes and di-enes is described.
telomerization reactions with 1,1-difluoroethylene and tetrafluoroethylene; other telomerization reactions of CF3I, C2F5I and n-C3F7I with 1,1-difluoroethylene and of n-C3F7I with tetrafluoroethylene are reported and the relative efficiencies of the iodides as chain-transfer agents are discussed. The telomeriodides have been coverted to useful models for some fluorocarbon polymer systems. A novel stereospecific
七氟-2-碘丙烷,iC 3 F 7 I,是与1,1-二氟乙烯和四氟乙烯进行端粒化反应时非常有效的链转移剂。报告了CF 3 I,C 2 F 5 I和nC 3 F 7 I与1,1-二氟乙烯以及nC 3 F 7 I与四氟乙烯的其他端粒化反应,并讨论了碘化物作为链转移剂的相对效率。端粒碘化物已覆盖到某些碳氟聚合物体系的有用模型中。顺式-(CF 3)2的立体定向合成报告了CF·CHCHF。
Antimony pentafluoride in the synthesis of novel fluoro-alkene derivatives and a novel approach to conjugated polymers
作者:Richard D. Chambers、Martin Salisbury、Glenn Apsey、Thomas F. Holmes、Silvana Modena
DOI:10.1039/c39880000679
日期:——
Elimination of hydrogen fluoride, using antimonypentafluoride, is a useful preparative process for some fluorinated alkenes and presents a new and simple approach to conjugatedpolymers.
使用五氟化锑消除氟化氢是一些氟化烯烃的有用制备方法,它为共轭聚合物提供了一种新的简单方法。
Fluoro-alkene forming eliminations using antimony pentafluoride
作者:Glenn C. Apsey、Richard D. Chambers、Paolo Odello
DOI:10.1016/0022-1139(96)03389-1
日期:1996.4
Reactions involving perfluoro-2-iodopropane and 1,1-difluoroethene, give telomers (1) and these telomeriodides are coupled to give [(CF3)2CF(CH2CF2)n−]2 (2). Fluorodeiodination gives a series of compounds (CF3)2CF(CH2CF2)nF (3). Lewis acid-induced eliminations from these systems is very effective using SbF5 and cyclisations can also be induced by this methodology. A series of conjugated polymers is