Notizen / Notes Metallorganische Lewis‐Säuren, XXXIX. σ,π‐Ethinid‐verbrückte Rhenium‐Eisencarbonyle [(OC)5Re (μ‐η1:η2‐CCR)‐Fe(CO)2Cp]+BF4− (R = Me, Ph)

Organometallic Lewis Acids, XXXIX. – σ, π‐Ethynide Bridged Rhenium Iron Carbonyls [(OC)5Re(μ‐η1:η2‐C)‐Fe(CO)2Cp]+BF4− (R = Me, Ph) The addition of Re(CO)5+ [as Re(CO)5FBF3] to Cp(OC)2‐FeCCR (R = Me, Ph) gives under electrophilic substitution of Fe(CO)2Cp+ by Re(CO)5+ the σ,π‐ethynide bridged title complexes 1 of which the phenylethynide compound 1a has been characterized by X‐ray structural analysis.