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(NH4)3

Hashimoto1, Kubata, Yagasaki

  • 1Department of Material Science and Chemistry, Faculty of Systems Engineering, Wakayama University, 930 Sakaedani, Wakayama 640-8510, Japan. mh1043@sys.wakayama-u.ac.jp.

Acta Crystallographica. Section C, Crystal Structure Communications
|December 19, 2000
PubMed
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Researchers synthesized triammonium cis-diaqua-cis-dioxo-trans-disulfatovanadate 1.5-hydrate by oxidizing vanadium(IV) to vanadium(V). This study details the structure of the resulting discrete anion, highlighting its unique vanadium-sulfate and water molecule arrangements.

Area of Science:

  • Inorganic Chemistry
  • Coordination Chemistry
  • Vanadium Chemistry

Background:

  • Vanadyl sulfate is a common precursor for vanadium compounds.
  • Oxidation of vanadium(IV) to vanadium(V) is crucial for synthesizing various vanadium complexes.
  • Sulfuric acid solutions are often used in vanadium chemistry.

Purpose of the Study:

  • To synthesize and characterize triammonium cis-diaqua-cis-dioxo-trans-disulfatovanadate 1.5-hydrate.
  • To elucidate the coordination environment around the vanadium atom.
  • To describe the structural features of the discrete [VO(2)(SO(4))(2)(OH(2))(2)](3-) anion.

Main Methods:

  • Oxidation of V(IV) to V(V) in sulfuric acid.
  • Synthesis of the title compound using vanadyl sulfate and ammonium sulfate.

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  • Structural analysis of the resulting vanadium complex (details not provided in abstract, but implied).

    • Main Results:

    • Successful synthesis of triammonium cis-diaqua-cis-dioxo-trans-disulfatovanadate 1.5-hydrate.
    • The vanadium atom is coordinated by two sulfate groups and two water molecules.
    • A discrete [VO(2)(SO(4))(2)(OH(2))(2)](3-) anion was formed.
    • Water molecules are in cis positions within the vanadium octahedron's equatorial plane.

    Conclusions:

    • The synthesis provides a new vanadium(V) compound with a specific coordination geometry.
    • The structure reveals corner-sharing sulfate groups forming a unique vanadium-sulfate linkage.
    • The arrangement of water ligands offers insights into vanadium coordination chemistry.