Reduction of [η5-(ferrocenoyl)cyclopentadienyl]dicarbonylnitrosylchromium (hereafter called cynichrodenylferrocenylketone) (1) with sodium borohydride gives cynichrodenylferrocenyl carbinol (5), whereas reduction with lithium aluminum hydride/ alluminum chloride leads to cynichrodenylferrocenylmethane (6). Protonation of 5 with fluoroboric acid produces α-cynichrodenyl-α-ferrocenylmethylium tetrafluoroborate (4), a new dimetallocenyl-stabilized carbonium ion. The diastereotopism of 1H and 13C nuclei was observed in both of 4 and 5. The chemical shifts of H(2-5) protons and C(2-5) carbons in 1H and 13C NMR spectra respectively have been assigned using two dimensional NMR spectroscopy. ? 1990.
