Bis(ferrocenyl)porphyrins. Compounds with strong long-range metal–metal coupling†

Abstract

The condensation of a dipyrromethane with ferrocene aldehyde leads to a single atropisomer of α,α-5,15-bis(ferrocenyl)-2,8,12,18-tetrabutyl-3,7,13,17-tetramethylporphyrin 1; electrochemistry of 1 and Ni-1 reveals two consecutive ferrocene-based one-electron oxidation waves, which are separated by 0.19 and 0.41 V, respectively.

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