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Excision of the

Mironov1, Virovets, Naumov

  • 1Institute of Inorganic Chemistry, Siberian Branch of Russian Academy of Sciences, Novosibirsk.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|June 7, 2000
PubMed
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New molybdenum cluster selenocyanide anionic complexes were synthesized and characterized. These novel compounds, [Mo6Se8(CN)6]7- and [Mo6Se8(CN)6]6-, were isolated as crystalline salts and their structures determined.

Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Solid-State Chemistry

Background:

  • Molybdenum-selenium clusters represent a fascinating class of inorganic compounds with unique electronic and structural properties.
  • Chevrel phases, known for their complex structures and diverse applications, serve as precursors for novel cluster synthesis.

Purpose of the Study:

  • To report the synthesis and structural characterization of new molybdenum cluster selenocyanide anionic complexes.
  • To investigate the electrochemical properties and redox behavior of the synthesized cluster compounds.

Main Methods:

  • Synthesis of [Mo6Se8(CN)6]7- via excision from a Chevrel phase precursor (Mo6Se8) using potassium cyanide (KCN) at elevated temperatures.
  • Oxidation of the [Mo6Se8(CN)6]7- ion to form the [Mo6Se8(CN)6]6- species.

Related Experiment Videos

  • Isolation and single-crystal X-ray diffraction analysis of new cluster salts K7[Mo6Se8(CN)6]·8H2O (1) and (Me4N)4K2[Mo6Se8(CN)6]·10H2O (2).

    • Main Results:

    • Successful synthesis of two novel molybdenum cluster selenocyanide anionic complexes: [Mo6Se8(CN)6]7- and [Mo6Se8(CN)6]6-.
    • Determination of the crystal structures of K7[Mo6Se8(CN)6]·8H2O (cubic, Fm3m) and (Me4N)4K2[Mo6Se8(CN)6]·10H2O (triclinic, P1).
    • Compound 1 exhibits paramagnetism due to 21 electrons per Mo6 cluster, and cyclic voltammetry shows a quasi-reversible redox transition at E1/2 = 0.63 V.

    Conclusions:

    • The study successfully expands the family of molybdenum cluster selenocyanide complexes.
    • The structural and electrochemical data provide fundamental insights into the properties of these novel inorganic materials.
    • The findings pave the way for further exploration of molybdenum cluster chemistry and potential applications.