New hydrido-carbonyl rhenates by reduction of [Re2(CO)10] with bases. X-ray crystal structure of the anion [Re2H2(μ-H)(CO)8]

The reaction of [Re2(CO)10] with OH- gives first [Re2H(CO)9]- and then, under more drastic conditions, the novel anion [Re2H2(CO)8]2-, which can be reversibly protonated to give [Re2H2(μ-H)(CO)8]-, whose structure has been elucidated by a X-ray investigation. Variable-temperature NMR spectra indicate that both the new hydrido carbonylates are fluxional in solution. © 1987 American Chemical Society.