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    • Keywords


      Tetraoxomolybdate; heptamolybdate; tetrathiomolybdate; dinuclear; all-sulphur analogue

    • Abstract


      The complexes [MoX4]2− (M = Mo; X = O or S) exist as the monomeric tetrahedral species in aqueous alkaline solutions. Acidification of tetraoxomolybdate results in the condensation of the tetrahedral units via a series of polyoxomolybdates leading to the ultimate formation of the trioxide MoO3. Heptamolybdate [Mo7O24]6− is the first major polyanion of the acidification reaction. In contrast, acidification of tetrathiomolybdates leads to the formation of amorphous molybdenum trisulphide via a dinuclear Mo(V) complex. The formation of the dinuclear Mo(V) complex precludes the formation of any higher nuclearity Mo(VI)-S complexes in aqueous solution. Thus it is shown that the all-sulphur analogue of heptamolybdate [M07S24]6− does not exist in alkaline medium and also cannot be isolated from aqueous acidic medium

    • Author Affiliations


      Bikshandarkoil R Srinivasan1

      1. Department of Chemistry, Goa University PO, Goa - 403 206, India
    • Dates

  • Journal of Chemical Sciences | News

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      Posted on July 25, 2019

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