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Pb(3)Te(2)O(6)Br(2).

Matthias Weil1, Berthold Stöger

  • 1Institute for Chemical Technologies and Analytics, Division of Structural Chemistry, Vienna University of Technology, Getreidemarkt 9/164-SC, A-1060 Vienna, Austria.

Acta Crystallographica. Section E, Structure Reports Online
|May 18, 2011
PubMed
Summary
This summary is machine-generated.

Single crystals of trilead bis-tellurate dibromide were grown hydro-thermally. The crystal structure features layered [Pb(3)Te(2)O(6)](2+) units with bromide anions, and active lone pairs on lead and tellurium atoms.

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Area of Science:

  • Inorganic Chemistry
  • Crystallography
  • Solid-State Chemistry

Background:

  • Understanding the structural properties of lead-tellurate compounds is crucial for materials science.
  • Hydrothermal synthesis offers a controlled method for growing single crystals of complex inorganic materials.
  • Isotypic structures provide valuable insights into how halide substitutions affect crystal packing and properties.

Purpose of the Study:

  • To synthesize and characterize the crystal structure of trilead(II) bis-[tellurate(IV)] dibromide.
  • To investigate the structural relationship with its chloride analogue.
  • To analyze the coordination environment and the role of lone-pair electrons in the crystal structure.

Main Methods:

  • Hydrothermal crystal growth.
  • Single-crystal X-ray diffraction analysis.
  • Structural comparison with isotypic compounds.

Main Results:

  • Single crystals of trilead(II) bis-[tellurate(IV)] dibromide (Pb(3)Te(2)O(6)Br(2)) were successfully grown.
  • The structure is isotypic with Pb(3)Te(2)O(6)Cl(2), featuring layered [Pb(3)Te(2)O(6)](2+) units and interstitial Br(-) anions.
  • Highly asymmetric coordination polyhedra were observed due to Pb-Br interactions, with stereochemically active lone pairs on Pb(II) and Te(IV) atoms.

Conclusions:

  • The crystal structure of Pb(3)Te(2)O(6)Br(2) is elucidated, revealing a layered architecture.
  • The study highlights the influence of bromide anions on the coordination environment and overall structure.
  • The stereochemical activity of lone pairs on lead and tellurium atoms is confirmed, impacting the compound's structural characteristics.