Polymerisierbare Ferrocene: Versuche zur Synthese von Polyferrocenen und Polyferrocenophanen

Polymerizable Ferrocenes: Synthetic Attempts towards Polyferrocenes and Polyferrocenophanes The novel polymerizable ferrocenes 8 (Scheme 2) and 11 (Scheme 3) have been synthesized, and cationic polymerization experiments towards bridged poly(1,1′-diisopropenyl)ferrocenes 1 as well as poly(1,1′,3,3′-tetraisopropenyl)ferrocenes 2 are discussed. In both cases, only oligomeric products with M¯nca. 1700/M¯w of ca. 2900 (1) and M¯nca. 1400/M¯w of ca. 4000 (2) have been isolated. On the other hand, synthetic attempts towards polyferrocenophanes 3 (Scheme 6) result in oligomeric products as well.