Multilayered iron complexes of metacyclophanes. 1H NMR behavior

Syntheses are described for a series of (η⁶-cyclophane)(η⁵cyclopentadienyl)iron(II) complexes, where the cyclophane moiety is anti-2.2]metacyclophane, anti-4,12-dimethyl2.2]metacyclophane, anti-4,12-dimethyl-7,15-dimethoxy2.2]metacyclophane, and 2.2](2,5)thiophenophane. The triple-layered complexes η⁶,η⁶-anti-2.2]metacyclophane)bis(η⁵-cyclopentadienyl)iron(II)] bis(hexafluorophosphate) and (η⁶,η⁶-anti-4,12-dimethyl2.2]metacyclophane)bis(η⁵-cyclopentadienyl)iron(II)] bis(hexafluorophosphate) were also prepared. The NMR spectra of these compounds provide a useful insight into the nature of the iron-cyclophane bonding.