Chemical synthesis with metal atoms: preparation and X-ray structure of (η5-cycloheptadienyl)-(η5-cycloheptatrienyl) iron. A bifluxional molecule

Abstract
[Fe(η5-C7H7)(η5-C7H9)] has been prepared by cocondensation of iron vapour with cycloheptatriene; an X-ray analysis shows a sandwich structure with open faces of the two η5-systems skew to each other, and in solution two types of fluxional behaviour are exhibited.