Rb2[B12(OH)12]·2H2O and Rb2[B12(OH)12]·2H2O2: Hydrate and perhydrolate of rubidium dodecahydroxo-closo-dodecaborate

► Rb2[B12(OH)12]·2H2O and Rb2[B12(OH)12]·2H2O2 could be prepared from Rb2[B12H12] and hydrogen peroxide. ► Both compounds contain quasi-icosahedral [B12(OH)12]2- anions and tenfold oxygen-coordinated Rb+ cations. ► Rb2[B12(OH)12]·2H2O2 is explosive on shock and temperature.