[Fe-2(Sb2s6)(Co)(6)](2+): A Cationic Group 15/16 Metal Cluster

The first group 15/16 cationic metal complex [Fe-2(Sb2S6)(CO)(6)][SbF6](2) . 2SO(2) is formed when [S-8][Sb2F11](2) is reacted with 3 equiv of iron pentacarbonyl in liquid sulfur dioxide at room temperature. The cationic cluster is formed from an Sb2S6 cage capped on each end through eta(1)-S, eta(2)-S-2 bound Fe(CO)(3) units. There is a center of inversion at the centroid position of the Sb2S6 cage. The antimony source is apparently the starting anion [Sb2F11](-). This appears to be an unprecedented example of the reaction of a cation with [Sb2F11](-).