Synthesis and Characterization of three Hydridocarbonyl Rhenium Cluster

We describe three new hydridocarbonylrhenium cluster anions, isolated as tetraethylammonium salts, viz. the triangular [H3Re3(CO)10]2-, the tetrahedral [H4Re4(CO)13]2- and the triangular [H3Re3(μ3-O)(CO)9]2-. These are obtained by decomposition of the hydride [H4Re4(CO)15][NEt4]2 in boiling ethanol under different conditions. The reactions also yield the known species [H2Re3(CO)12]- and [H6Re4(CO)12]2- as tetraethylammonium salts.