The mixed trimeric compounds containing one ferrocene unit, N,N'-bis(2-hydroxy-5-substituted benzylidene)ferrocenylmethylenediamine, have been synthesized directly through the reaction between 1 mol of ferrocenecarboxaldehyde and 2 mol of 5-substituted salicylaldehyde. A correlation between 13C NMR chem. shifts of carbon atoms of the Cp ring and the Hammett constants has been found. The oxidation potentials for these compounds were determine by cyclic voltammetry. The other type of trimeric product containing 2 ferrocene units has also been synthesized. Its 13C NMR anal. showed that the 2 ferrocenyl units differ in chem. environment due to intramol hydrogen bonding and steric effects.

Key words: PHENOL P, BENZALDEHYDE P, C13 NMR SPECTROMETRY, AMMONIA, MONOALDEHYDE, POLYMERIZATION, CHEMICAL SHIFT, DINUCLEAR COMPLEX, DIAMINE, CYCLOVOLTAMGRAPH