Theoretical Investigations of the Reactivity of MO 4 and the Electronic Structure of Na 2 [ MO 4 ( OH ) 2 ] , where M = Ru , Os , and Hs ( element

Na2[MO4(OH)2], where M = Ru, Os, and Hs (element 108) V. Pershina and J. V. Kratz *GSI, Darmstadt **Institut für Kernchemie, Universität Mainz Recent experiments on the chemical identification of element 108, Hs, have delivered straightforward evidence that it belongs to group 8 of the Periodic Table [1]. In the presence of oxygen, Hs formed HsO4 which was deposited in a gas-phase chromatography column at a temperature somewhat higher than that of OsO4, thus confirming its chemical similarity with the latter and the high volatility. In more recent experiments [2] with volatile tetroxides, HsO4 was shown to react with moisturized NaOH forming very probably the sodium hassate (VIII), Na2[HsO4(OH)2], by analogy with Na2[OsO4(OH)2] according to the reaction