Between MOFs and molecules: organolead(IV) compounds with chain structures.

Area of Science:

• Coordination Chemistry
• Materials Science
• Organometallic Chemistry

Background:

• Organolead compounds are recognized for their catalytic properties.
• Organolead halides show promise as efficient materials for solar cells.
• The synthesis and structural characterization of novel organolead(IV) compounds are crucial for exploring their potential applications.

Purpose of the Study:

• To synthesize and characterize novel organolead(IV) dimethylarsinates and diphenylphosphinate compounds.
• To investigate the structural properties of these synthesized compounds using advanced analytical techniques.
• To understand the influence of ligand structure and steric effects on the resulting supramolecular architecture.

Main Methods:

• Synthesis of three distinct organolead(IV) compounds: two dimethylarsinates and one diphenylphosphinate.
• Characterization via single-crystal X-ray diffraction to determine precise atomic arrangements and coordination geometries.
• Supportive characterization using IR spectroscopy and mass spectrometry for structural and compositional verification.

Main Results:

• Compound (1) exhibits a chain structure with five-coordinate Pb(IV) atoms bridged by chloride and arsinate ligands.
• Compound (2) forms double chains with heptacoordinated Pb(IV) atoms, utilizing bidentate and chelate-like dimethylarsinate ligands.
• Compound (3) displays a linear chain structure with pentacoordinated Pb(IV) atoms linked by phosphinate bridges.

Conclusions:

• The steric bulk of phenyl ligands on Pb(IV) restricts ligand interconnections to one dimension.
• The synthesized compounds form various chain structures rather than extended metal-organic frameworks (MOFs).
• This structural outcome provides insights into the design principles for organolead materials with tailored properties.