Specific cleavage of a carbon–carbon bond in the complexation of C6Et6 by Fe(C5Me5)+. Crystal structure of [Fe(η5-C5Me5)(η6- C6Et5H)]+ PF6–
Abstract
The reaction between [Fe(C5Me5)(CO)2Br] and C6Et6 in the presence of AlCl3 does not give [Fe(C5Me5)(C6Et6)]+ but, in the prsence of protic impurities, [Fe(C5Me5)(C6Et5H)]+ is the only cation formed; the X-ray crystal structure of its PF6– salt shows that all Et substituents are distal and a σ intermediate is proposed for the complexation.