Lanthanide oxochalcogenido clusters.

Area of Science:

• Inorganic Chemistry
• Materials Science
• Lanthanide Chemistry

Background:

• Lanthanide chalcogenolates are versatile precursors for synthesizing novel inorganic compounds.
• Oxychalcogenido clusters represent an important class of materials with diverse structural motifs.

Purpose of the Study:

• To investigate the reactions of lanthanide chalcogenolates with TeO(2) and py-SO(3) to synthesize new oxychalcogenido clusters.
• To characterize the structural and thermal decomposition properties of the resulting lanthanide-containing compounds.

Main Methods:

• Reaction of lanthanide chalcogenolates with TeO(2) in pyridine and py-SO(3) in THF.
• Low-temperature synthesis to control product formation.
• Single-crystal X-ray diffraction for structural determination.
• Thermal decomposition analysis.

Main Results:

• Synthesis of sulfido derivatives (THF)(8)Ln(8)S(2)O(2)(SePh)(16) (Ln = Ce, Nd) isostructural with oxoselenido analogs.
• Formation of a complex heterocluster product containing tetrametallic polytelluride and oxotellurido compounds [(py)(5)Ln(3)(mu(3)-O)(mu(2)-Te(2))(3)(TePh)] (Ln = Ho, Er).
• Thermal decomposition of sulfide compounds yielded Ln(3)Se(4), while telluride compounds formed LnTe and Te metal.

Conclusions:

• Lanthanide chalcogenolates can be effectively transformed into diverse oxychalcogenido clusters.
• Reaction conditions, particularly temperature, are crucial for controlling the formation of specific cluster types.
• The synthesized compounds exhibit distinct thermal decomposition pathways.