The hydroxyhydrido salt [Rh6(PiPr3)6H11(OH)][BArF4]2 results fromthe addition of water to [Rh6(PiPr3)6H12][BArF4]2. This reaction isreversible, and the addition of dihydrogen to [Rh6(PiPr3)6H11(OH)][BArF4]2 results in the elimination of water and the regeneration ofthe hydride cluster.