[Cu₁₂ (P₂ Se₆ ){Se₂ P(OR)₂ }₈ ]: Discrete Copper Clusters Containing an Ethane-Like Hexaselenodiphosphate(IV).

Area of Science:

• Inorganic Chemistry
• Coordination Chemistry
• Materials Science

Background:

• Exploration of novel ligands for complex inorganic structures.
• Investigation of phosphorus-selenium compounds in coordination chemistry.

Purpose of the Study:

• To synthesize and characterize novel dodecanuclear copper complexes.
• To investigate the unique structural and coordination properties of the hexaselenodiphosphato ligand (P2Se6^4-).

Main Methods:

• Synthesis of title compounds with R=Et or iPr.
• Structural elucidation of the dodecanuclear copper species.
• Analysis of the coordination mode of the P2Se6^4- ligand.

Main Results:

• Discovery of dodecanuclear copper complexes containing the P2Se6^4- ligand.
• Observation of coexisting P(IV) and P(V) oxidation states within the ligand.
• Identification of an unprecedented coordination mode for the P2Se6^4- ligand.

Conclusions:

• The P2Se6^4- ligand presents unique structural and electronic properties.
• The observed coordination mode is novel, even compared to other mixed Group 15/16 ligands.
• These findings expand the scope of coordination chemistry involving phosphorus-selenium ligands.