Reduction of [Cp2∗Mo2O5] by thioglycolic acid in an aqueous medium: Synthesis and structure of [{Cp*Mo(μ-SCH2COO)}2(μ-S)]

Compound [Cp2∗Mo2O5] reacts with thioglycolic acid, HSCH2COOH, in an acidic (CF3COOH) mixed water–methanol solvent, to yield compound [{Cp*Mo(μ-SCH2CO2)}2(μ-S)]. During this reaction, the thioglycolic acid acts as a reducing agent, as a ligand, and provides a sulfide ion for the Mo–S–Mo bridge. The molecular structure of the product can be described as containing two four-legged piano stools that share three legs. The Mo–Mo distance of 2.792(7) Å indicates metal–metal bonding, in agreement with the compound diamagnetism.

Graphical abstractCompound [Cp2∗Mo2O5] reacts with thioglycolic acid, HSCH2COOH, in an acidic (CF3COOH) mixed water–methanol solvent, to yield compound [{Cp*Mo(μ-SCH2CO2)}2(μ-S)]. During this reaction, the thioglycolic acid acts as a reducing agent, as a ligand, and provides a sulfide ion for the Mo–S–Mo bridge. The molecular structure of the product can be described as containing two four-legged piano stools that share three legs. The Mo–Mo distance of 2.792(7) Å indicates metal–metal bonding, in agreement with the compound diamagnetism.Figure optionsDownload full-size imageDownload as PowerPoint slide