Condensation polymers of ferrocene derivatives

Experimental details are given for the preparation of 1,1′‐ferrocenedicarboxylic acid and 1,1′‐ferrocenedicarbonyl chloride. Ferrocenedicarbonyl chloride was used to prepare novel condensation polymers containing the ferrocene nucleus as part of the main polymer chain. Interfacial polycondensation was used for the preparation of polyamides from ethylenediamine, hexamethylenediamine, piperazine, and p‐phenylenediamine. The polyamide from piperazine was obtained in crystalline form from tetrachloroethane. Polyesters were prepared from 4,4′‐ isopropylidinediphenol and hydroquinone. The polyester from ethylene glycol was prepared in low molecular weight from 1,1′‐dicarbomethoxyferrocene by transesterification.