syn- and anti-[0]Orthocyclo[2]orthocyclo[0](1,1′)ferrocenophan-7-enes were synthesized via an intramolecular reductive coupling of 1,1′-bis(o-formylphenyl)ferrocene with low valent titanium reagents, syn- and anti-[0]Orthocyclo[2]orthocyclo[0](1,1′)ferrocenophanes and [0]paracyclo[2]paracyclo[0](1,1′)ferrocenophane were prepared by the reaction of 1,1′-bis[o-(bromomethyl)phenyl]ferrocene and 1,1′-bis[p-(bromomethyl)phenyl]ferrocene with butyllithium. The transannular π-electronic interactions between two aromatic rings in these compounds were examined on the basis of the NMR and electronic spectra.
Several ferrocenophanes, in which the two cyclopentadienyl rings are linked by acetylenic and olefinic bonds and aromatic rings, have been synthesized via the titanium-induced reductive coupling of the corresponding formyl compounds. The structures of these ferrocenophane compounds were determined by means of their IR and NMR spectra. The transannular π-electronic interactions between the two chromophores were examined on the basis of the electronic spectra.
Several naphthalenoferrocenophanes, in which the two cyclopentadienyl rings are linked by two naphthalene rings, were synthesized via intramolecular reductive coupling of the corresponding formyl compounds with a low valent titanium reagent. Their structures are deduced from IR, NMR, and UV spectra. Transannular π-electronic interaction between the two naphthalene rings is discussed on the basis of electronic spectra.
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