Cobalticinum salts

Our cooperation with Sheats also extended into the area of condensation polymers of cobalticinum salts.92 Ionic polyesters were prepared by melt-phase transesterification of 1,1 bis(carbethoxy)cobalticinium hexafluorophosphate with various diols. Low molecular-weight polysters were formed. However, attempts to prepare polyamides by melt condensations of alkylene diammonium salts of l,l -bis(carboxy)cobalticinium PFg salts resulted in decomposition.92... 

Several special dicarboxylic acid salts were used to produce both fer-rocene and cobalticinum-containing polyesters. Ferrocene reactions to produce structure 9, were studied as a function of pH. The pK q for 1,1 -ferrocenedicarboxylic acid (FDCA) is not known but should be near 6.8. ... 

Cobalticinum-containing products, 10, were synfliesized using l,T-dicar-boxycobalticinimn salts. The results are consistent wifli other studies reported above. Product yield increases to about a stirring rate of 15,700 rpm. The observed variations in where the (concentration) plateau occms may eventually be used to better imderstand these rapidly stirred systems. 

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