Bis(η²‐ethene)(η⁶‐toluene)iron

Abstract

A novel reactive areneiron complex, the title compound 1, was obtained from bis(toluene)iron and ethene at −60°C via the route outlined below. 1, which decomposes at ca. −20°C, is a good transfer reagent for the tolueneiron fragment; alkynes are cyclotrimerized above O°C.