Some reactions of tricarbonyl(η-hexa-1,3,5-triene)iron(0)

Abstract

The title complex has been prepared from the reaction of hexa-1,3,5-triene with nonacarbonyldi-iron(0), and some reactions of the unto-ordinated olefinic residue with electrophiles and with eneophiles have been studied. With boranes, tricarbonyl(3–6-η-hexa-3,5-dien-1-ol)iron(0) is obtained in moderate yields, after oxidative work-up of the intermediate borane complex, and with osmium tetraoxide in pyridine tricarbonyl(3–6-η-hexa-3,5-diene-1,2-diol)iron(0) is obtained in poor yields. With other electrophiles. no characterisable iron-containing organic compounds have been isolated. Protonation of the title complex gives tricarbonyl(2–6-η-hexadienyl)iron(0) tetrafluoroborate. Attempts to deprotonate this complex lead to the isolation of other products.