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Related Experiment Videos

Polymorphs with varying platinum(II)-thallium(I) interactions.

Jay R Stork1, Marilyn M Olmstead, Alan L Balch

  • 1Department of Chemistry, University of California, Davis, One Shields Avenue, Davis, CA 95616, USA.

Journal of the American Chemical Society
|May 5, 2005
PubMed
Summary

Two crystalline forms of thallium(I) [(C4H9N4)platinum(II) dicyanide] were identified. One exhibits an extended platinum-thallium chain, while the other features dimers linked by platinum-thallium interactions.

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Area of Science:

  • Inorganic Chemistry
  • Solid-State Chemistry
  • Crystallography

Background:

  • Polymorphism is common in coordination compounds, influencing their physical and chemical properties.
  • Extended metal-metal interactions are crucial for understanding electronic and optical behavior.

Purpose of the Study:

  • To investigate the structural diversity and bonding characteristics of TlI[(C4H9N4)PtII(CN)2].
  • To elucidate the nature of platinum-thallium interactions in different crystalline environments.

Main Methods:

  • Single-crystal X-ray diffraction analysis.
  • Characterization of crystalline polymorphs.

Main Results:

  • Discovery of two distinct polymorphs: a red form with an extended Pt-Tl-Pt-Tl chain and a yellow form with linked dimers.

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  • Detailed structural analysis revealing specific Pt...Tl distances (3.0978(2) Å and 3.0256(5) Å) and angles.

    • Conclusions:

    • The compound TlI[(C4H9N4)PtII(CN)2] exhibits rich polymorphism driven by varying Pt...Tl interactions.
    • The observed structures provide insights into the directional bonding capabilities of platinum and thallium ions in extended networks and dimeric units.