Ferrocenylborane polymers

Borylated ferrocenes have been exploited by Wagner as building blocks for the assembly of macrocycles and coordination polymers (Scheme 15). Treatment of the diborylated ferrocene l,L-fc(BMe2)2 with the bifunctional aromatic amines pyrazine and 4,4 -bipyridine, respectively, led to spontaneous and reversible formation of (89) and related ferrocenylborane polymers.The polymeric nature of... 

Scheme 15 Coordination polymers and macrocycles from ferrocenylboranes...

Scheme 12 shows the thermally initiated ROP of boron bridge containing [l]ferrocenophanes. Due to the high strain of these molecules from the large ring tilts, the ROP reaction was able to proceed at temperatures of 180-200°C. All the poly(ferrocenylboranes) formed were found to be insoluble except for polymer 42c. 

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