Metal carbonyl chemistry. Part X. Mono(fluoro-olefin) complexes from pentacarbonyliron

Abstract

U.v. irradiation of fluoro-olefins with pentacarbonyliron or nonacarbonyldi-iron gives complexes of the type (olefin)Fe(CO)₄(olefin = CF₂:CFCl, CF₂:CFBr, CF₂:CCl₂, CF₃·CF:CF₂, CF₃·CH:CF₂, cyclo-C₄F₆, cyclo-C₅F₈, or cyclo-C₆F₁₀) in which the olefin is only weakly bound to iron. Thermal decomposition, and reactions of the complex from hexafluoropropene with halogens, acid, base, triphenylphosphine, and phosphorus pentachloride are discussed. The mono-olefin complex initially formed from tetrafluoroethylene reacts readily with a second molecule of olefin to give cyclo-octafluorotetramethylenetetracarbonyliron.