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Related Experiment Videos

Tri-phenyl-tellurium chloride.

Ambika Chopra1, Shalini Jain1, Sanjay K Srivastava1

  • 1School of Studies in Chemistry, Jiwaji University, Gwalior 474011, India.

Acta Crystallographica. Section E, Structure Reports Online
|May 15, 2014
PubMed
Summary

This study details the crystal structure of a tellurium compound (C18H15ClTe), revealing tetrahedral geometry around the tellurium atom due to a non-sterically active lone pair. Crystal packing involves C-H⋯π interactions.

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Area of Science:

  • Organometallic Chemistry
  • Crystallography
  • Materials Science

Background:

  • Organotellurium compounds exhibit diverse geometries and bonding characteristics.
  • Understanding the solid-state structure of tellurium halides is crucial for predicting their reactivity and properties.

Purpose of the Study:

  • To elucidate the crystal structure and molecular geometry of the title compound, C18H15ClTe.
  • To investigate the influence of lone pair electrons on the geometry around the tellurium atom.
  • To analyze intermolecular interactions within the crystal lattice.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
  • Analysis of electron domains and steric factors was performed to explain the observed geometry.

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  • Dihedral angles and intermolecular interactions (C-H⋯π) were quantified.

    • Main Results:

    • The asymmetric unit contains two inversion-related molecules of C18H15ClTe.
    • The tellurium atom displays a tetrahedral geometry despite having five electron domains, attributed to a non-sterically active lone pair.
    • Significant dihedral angles between phenyl rings were observed (ranging from 71° to 79°).
    • Eight instances of C-H⋯π interactions were identified in the crystal packing.

    Conclusions:

    • The crystal structure of C18H15ClTe is characterized by tetrahedral geometry at the tellurium center, influenced by lone pair non-activity.
    • The study provides insights into the stereochemistry of organotellurium compounds.
    • Intermolecular C-H⋯π interactions play a role in the crystal packing of this tellurium derivative.