Multilayered iron complexes of metacyclophanes. 1H NMR behavior

Abstract Syntheses are described for a series of (η 6 -cyclophane)(η 5 cyclopentadienyl)iron(II) complexes, where the cyclophane moiety is anti -[2.2]metacyclophane, anti -4,12-dimethyl[2.2]metacyclophane, anti -4,12-dimethyl-7,15-dimethoxy[2.2]metacyclophane, and [2.2](2,5)thiophenophane. The triple-layered complexes η 6 ,η 6 - anti -[2.2]metacyclophane)bis[(η 5 -cyclopentadienyl)iron(II)] bis(hexafluorophosphate) and (η 6 ,η 6 - anti -4,12-dimethyl[2.2]metacyclophane)bis[(η 5 -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.