Preparation and structures of the cluster dimers consisting of Rh2Mo2S4 single-cubane units connected by two bidentate N-donor ligands

Reactions of a single-cubane cluster [{Rh(cod)}2{MoCl(dtc)}2(μ3-S)4] (cod = 1,5-cyclooctadiene, dtc = diethyldithiocarbamate) with 1 equiv. of L (L = pyrazine, 4,4′-bipyridyl, trans-1,2-bis(4-pyridyl)ethylene) in the presence of 2 equiv. of AgBF4 in CH2Cl2 gave doubly bridged double-cubane clusters [({Rh(cod)}2{Mo(dtc)}2(μ3-S)4)2(μ-L)2][BF4]4, whose structures were determined by the single-crystal X-ray analysis.