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Dinuclear and heteropolynuclear complexes containing Mo2(4+) units.

R Clérac1, F A Cotton, K R Dunbar

  • 1Laboratory for Molecular Structure and Bonding, Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, Texas 77842-3012, USA.

Inorganic Chemistry
|February 24, 2001
PubMed
Summary

New molybdenum-molybdenum quadruply bonded compounds with dinuclear cores were synthesized. These compounds react with cobalt and copper salts, forming novel multinuclear complexes with interesting structural and bonding properties.

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[Mo3(mu3-O)2(O2CC6H5)6(H2O)3](ClO4)2.HClO4.3CH3CH2OH: Corrigendum.

Inorganic chemistry·2012

Area of Science:

  • Inorganic Chemistry
  • Coordination Chemistry
  • Materials Science

Background:

  • Quadruply bonded dimolybdenum compounds are foundational in inorganic chemistry.
  • Ligand substitution reactions are key for synthesizing novel metal-metal bonded complexes.
  • Understanding the structural and electronic properties of multinuclear complexes is crucial for developing new materials.

Purpose of the Study:

  • To synthesize and characterize a new quadruply bonded dimolybdenum compound, Mo2(DpyF)4.
  • To investigate the reactions of Mo2(DpyF)4 with transition metal salts (cobalt and copper).
  • To elucidate the structural and bonding characteristics of the resulting multinuclear complexes.

Main Methods:

  • Ligand substitution reactions using Mo2(OOCCF3)4 and N,N'-di(2-pyridyl)formamidine (HDpyF) or its lithium salt.

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  • X-ray structural analysis to determine the precise atomic arrangement and bond distances.
  • Reactions with cobalt(II) chloride and copper(I) chloride in methanol to form new complexes.

    • Main Results:

    • Synthesis of Mo2(DpyF)4 with a paddlewheel structure and a Mo-Mo distance of 2.1108(6) A.
    • Formation of [Mo2Co(DpyF)4][CoCl4]·2MeOH, featuring a low-spin Co(II) atom with no direct Co-Mo bonding.
    • Synthesis of [Mo2Cu4(DpyF)4Cl2][CuCl2]2·2MeOH·xEt2O, with copper atoms coordinated to the dimolybdenum core and bridging chlorides.

    Conclusions:

    • Mo2(DpyF)4 serves as a versatile precursor for constructing multinuclear complexes.
    • The reactions with CoCl2 and CuCl yield novel structures with distinct metal-metal interactions.
    • The structural diversity highlights the adaptability of the DpyF ligand in coordinating multiple metal centers.