The cationic oligomerization of isopropylcyclopropane

✍ Scribed by W. Naegele; H. Haubenstock

• Book ID: 104212678
• Publisher: Elsevier Science
• Year: 1965
• Tongue: French
• Weight: 292 KB
• Volume: 6
• Category: Article
• ISSN: 0040-4039
• DOI: 10.1016/s0040-4039(00)71087-2

✦ Synopsis

Recent studies of the cationic polymerization of cyclopropane and alkyl substituted cyclopropanes have emphasized the carbonium ion nature of the intermediates involved in propagation. Ketley (1) has depicted the cleavage of the cyclopropyl ring in l,l-dimethylcyclopropane as involving attack by a carbonium ion: CH R* I3 + CH2 \z(CR3)z -R-CH2-CH2-?* 2 CH3 Tipper and Walker (2) have studied the kinetics of the polymerization of cyclopropane by AlBr3-RBr in heptane between 0' and -78'C. They postulated that the polymerization of cyclopropane proceeded by s carbonium ion mechanism in a manner similar to that of propylene and other Friedel-Crafts olefin polymerizations, The propagation was described as involving formation of s growing chain-monomer r -complex, which then rearranged to a higher carbonium ion: the