Heterometallic Ln/Hg tellurido clusters.

Area of Science:

• Inorganic Chemistry
• Materials Science
• Coordination Chemistry

Background:

• Lanthanide telluride complexes are of interest for their unique structural and electronic properties.
• The synthesis of heterometallic clusters involving lanthanides and post-transition metals remains a challenging area in coordination chemistry.

Purpose of the Study:

• To synthesize and characterize novel heterometallic clusters containing lanthanides (Er, Tm, Lu), mercury, and tellurium.
• To investigate the structural features and bonding in these newly formed cluster compounds.

Main Methods:

• In situ synthesis of lanthanide telluride precursors (Ln(TePh)(3)) via reduction of PhTeTePh with elemental Ln and Hg catalyst.
• Reaction of precursors with elemental tellurium to form heterometallic clusters.
• Single-crystal X-ray diffraction for structural characterization of the isostructural clusters: (py)(7)Ln(3)HgTe(4)(TePh)(3).

Main Results:

• Successful synthesis of three isostructural heterometallic clusters: (py)(7)Ln(3)HgTe(4)(TePh)(3) for Ln = Er, Tm, Lu.
• Determination of a unique cubane arrangement of metal ions within the cluster structure.
• Identification of distorted tetrahedral Hg(II) and two chemically inequivalent octahedral Ln(III) coordination environments.

Conclusions:

• The study reports the first synthesis and structural elucidation of heterometallic cubane-like clusters containing lanthanides, mercury, and tellurium.
• The structural diversity and coordination modes highlight the versatility of these elements in forming complex inorganic architectures.
• The lutetium compound demonstrates potential for decomposition into lutetium tellide (LuTe) at elevated temperatures, suggesting applications in materials synthesis.