Formation of η6-arene-closo-carbaferraboranes by the reaction of a closo-carbaborane with cyclo-octadiene (η-cyclopentadienyl)iron in the presence of arenes: molecular structure of [closo-1-(η6-PhMe)-2,4-Me2-1,2,4-FeC2B9H9]

Abstract

Reaction of 2,3-Me₂-2,3-C₂B₉H₉ with [Fe(1,5-C₈H₁₂)(η-C₅H₅)] in benzene, toluene, o-xylene, or with an excess of naphthalene in light petroleum, affords the complexes [closo-1-(η⁶arene)-2,4-Me₂-1,2,4-FeC₂B₉H₉], the identity of the toluene complex being established by X-ray crystallography; reaction of the η⁶-naphthalene complex with the ligands L = CO or P(OMe)₃ affords [closo-1,1,1-L₃-2,4-Me₂-1,2,4-FeC₂B₉H₉].