Umwandlung der Cluster Fe3(CO)9(μ3-η2-N2Et2) und Fe3(CO)9(μ3-NEt)2 zu organischen Produkten 1)

Conversion of the Clusters Fe3(CO)9(μ3-η2-N2Et2 and Fe3(CO)9(μ3-NEt)2 into Organic Products The azoalkane-bridged cluster Fe3(CO)9(μ3-η2-N2Et2) (1) and its thermal rearrangement product Fe3(CO)9(μ3-NEt)2 (2) are converted by standard routes into derivatives with one carbene ligand C(Ph)OEt (3, 4). Degradation (thermally or oxidatively) of these compounds produces the diaziridine (5) and/or the iminoester EtN = C(Ph)OEt (6). 4 and moist p-tolyl isocyanide form the indole derivative 8. 1 adds one or two equiv. of alkynes leading to the alkyne-bridged cluster 9 or the ferrole-type clusters 10. The clusters 10, resulting from HCCPh, exist as two isomers 10a and b which can be equilibrated and separated. An alternative route to 10 c (alkyne: MeCCMe) starts from Fe2(CO)6(C4Me4) by treating it with Fe2(CO)9 and N2Et2. Photolytic or oxidative degradation of the clusters 10 produces substituted furan 13, pyrrole 14, or dihydropyridazine 15. The crystal structures of the clusters 4, 9, 10a, and 10b have been determined.