A general route to [h 5-C5H5Fe(CO)2(olefin)]+BF4 ? complexes

Abstract
Metal–olefin cations of the type [h5-C5H5Fe(CO)2(olefin)]+ may readily be prepared by treatment of the complex [h5-C5H5(CO)2(isobutene)]BF4 with an excess of olefin.