Preparation, characterization and electrochemical and X-ray structural studies of new conjugated 1,1′-ferrocenediyl-ended [CpFe-arylhydrazone]+ salts
Abstract
A series of new conjugated bimetallic ferrocenyl 1,1′-bis-substituted compounds of the type (E)-[CpFe(η6-p-RC6H4)NHNCH(η5-C5H4)Fe(η5-C5H4)–CH
CHC6H4-p-R′]+PF6−
(Cp = η5-C5H5; R, R′ = H, NO2, 11; Me, NO2, 12; MeO, NO2, 13; Cl, NO2, 14; Me, CN, 15; Me, Me, 16), with end-capped (E)-ethenylaryl and [CpFe(arylhydrazone)]+ substituents, have been prepared by the condensation reaction of 1,1′-(p-R′-arylethenyl)ferrocenecarboxaldehyde (R′ = Me, 4; NO2, 5; CN, 6) with the organometallic
CH(η5-C5H4)]2Fe}2+[PF6−]2
(R = H, 17; Me, 18; MeO, 19, Cl, 20), which results from the condensation of two equivalents of the same organometallic
C double bond. All the new compounds were thoroughly characterized by a combination of elemental analysis, spectroscopic techniques (