A series of di-, tri-, and tetraferrocenylarenes were synthesized by using the nickel- and palladium-catalyzed cross coupling reactions of ferrocenylzinc chloride with the corresponding di-, tri-, and tetrahalogenoarenes. Redox properties of these ferrocenylarenes were studied by cyclic voltammetry in order to examine the intramolecular interaction between the ferrocenyl substituents.

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1,1-Diferrocenylethylenes have been synthesized efficiently by palladium-catalyzed cross-coupling reaction. The interaction of the two ferrocene units has been investigated in the neutral, monocationic and dicationic states using spectroscopic analyses.

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