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Related Experiment Videos

A nido-6-manganadecaborane salt.

A R Kennedy1, J H Morris

  • 1Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow G1 1XL, Scotland. a.r.kennedy@strath.ac.uk

Acta Crystallographica. Section C, Crystal Structure Communications
|March 16, 2001
PubMed
Summary

A novel manganadecaborane compound was unexpectedly synthesized from a reaction involving manganese carbonyl bromide and potassium borohydride. This new bromo-substituted nido-manganadecaborate features a unique cage structure with implications for boron cluster chemistry.

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Area of Science:

  • Organometallic Chemistry
  • Boron Cluster Chemistry
  • Inorganic Synthesis

Background:

  • Manganadecaboranes are organometallic compounds containing manganese and boron.
  • Nido-carboranes possess a cage structure derived from a complete polyhedron by the removal of one vertex.
  • The synthesis of novel boron clusters often leads to new structural motifs and reactivity.

Purpose of the Study:

  • To report the isolation and characterization of a new manganadecaborane.
  • To elucidate the structural features of the synthesized compound.
  • To investigate the impact of a bromo substituent on the cage symmetry.

Main Methods:

  • Reaction of [Mn(CO)(5)Br] with K[B(9)H(14)] to yield the target compound.
  • Isolation and purification of the tetrabutylammonium salt of the manganadecaborane.

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  • X-ray crystallography to determine the molecular structure and bonding parameters.

    • Main Results:

    • A new manganadecaborane, tetrabutylammonium 5-bromo-6,6,6-tricarbonyl-6-manganadodecahydrodecaborate(1-), was successfully isolated.
    • The compound exhibits a nido cage structure with the manganese atom coordinated via three B-Mn bonds.
    • The bromo substituent was found to break the inherent twofold symmetry of the cage, influencing B-B bond lengths.

    Conclusions:

    • The unexpected product expands the known family of manganadecaboranes.
    • The structural analysis provides insights into the bonding and symmetry in substituted boron cages.
    • This discovery highlights the potential for new structural diversity in organoboron chemistry.