A Cyclopropenylidene Approach to Tricarbide Complexes: Synthesis and Structure of [{Fe(CO)_2(Cp)}_3(μ3-C_3)][SbF_6]

摘要

Carbon fragments have long been studied in the gas phase and as astrophysical objects. Gaseous carbon fragments such as C_2 and C_3 are generated by subjecting hydrocarbons or graphite to high temperatures or irradiation. In order to study these fragments in condensed phases, they must be trapped by an organic reaction or by attachment to an inorganic framework. There are several examples of complexes with C_1 or C_2 ligands bridging two or more metals. More recently, complexes with linear C_3 and C_4 chains connecting two metals have been reported. Other complexes of pure carbon ligands include a tricobalt complex of cyclo-C_(18) and several metal complexes of the fullerenes (C_(60), C_(70), etc.) prepared by Fagan, Balch, and others. We are interested in preparing metal complexes of other small C_x ligands. We report here the first trimetallic complex of cyclo-C_3.