Cumulene complexes of transition metals. Part I. Hexacarbonyldi-iron complexes

Abstract

Reactions of Ar₂CCBr₂ and XR₂C·CC·CR₂X with iron carbonyls or carbonylates give hexacarbonyldi-iron complexes of butatrienes. The same complexes are also obtained from the reactions of butatrienes with iron carbonyls, thus supporting their formulation. The structures are proposed for compounds of formulæ C₃₄H₂₀Fe₂O₆, C₉H₈FeO₅, and C₁₅H₁₀Fe₂O₇, which are also produced in these reactions.