Thermische und Photo-induzierte Substitutionsreaktionen an der Eisen-ethyl-Verbindung CpFe(CO)2Et. Die Molekülstruktur von CpFe(PMe3)2COEt (Cp =η5-C5H5)/ Thermal and Photo-Induced Substitution Reactions of the Iron Ethyl Compound CpFe(CO)2Et. The Molecular Structure of CpFe(PMe3)2COEt (Cp = η5-C5H5)

Abstract

Abstract The photo-induced reaction of CpFe(CO)2Et (1) with either trimethylphosphane or trimethylphosphite (L) in solution results in formation of the substitution products CpFe(CO)(L)Et (3), CpFe(L)2Et (5), and the hydrido complexes CpFe(CO)(L)H (4), and CpFe(L)2H (0). In contrast, the thermal reaction of 1 with L yields the adduct CpFe(CO)(L)COEt (7) and the dimeric compound Cp2Fe2(CO)3L. Under photochemical conditions, the terminal carbonyl ligand in 7 can be replaced by L to give the derivative CpFe(L)2COEt (8). According to a crystal structure determination of CpFe(PMO3)2COEt, the complex possesses a η1 -bonded propionyl ligand. The IR and NMR data, however, are indicative for a η2 -bonded propionyl ligand.