A 15-electron Ru(III) complex containing carborane-thiolato ligands heterolytically cleaves dihydrogen at ambient pressure and temperature to give Ru(IV)/Ru(II) species containing a hydrido ligand at Ru(IV) and SH ligand at Ru(II). In the presence of HBF4·H2O the reaction further leads to an unprecedented replacement of an S atom by an O atom in the carborane-dithiolato ligand.
