Poly[(μ(5)-2,2'-bipyridine-5,5'-dicarboxyl-ato)lead(II)].

Area of Science:

• Coordination Chemistry
• Materials Science
• Crystallography

Background:

• Polymeric metal-organic compounds offer tunable properties for various applications.
• Lead(II) compounds are of interest due to their diverse coordination behaviors.
• Understanding the structural motifs in lead-based polymers is crucial for materials design.

Purpose of the Study:

• To synthesize and characterize a novel polymeric lead compound.
• To elucidate the coordination environment and three-dimensional structure of the [Pb(C(12)H(6)N(2)O(4))](n) complex.
• To investigate the role of the 2-2 -bipyridine-5,5 -dicarboxylate ligand in forming extended structures.

Main Methods:

• Single-crystal X-ray diffraction analysis to determine the molecular and crystal structure.
• Infrared spectroscopy to confirm the presence of functional groups.
• Elemental analysis to verify the compound's stoichiometry.

Main Results:

• The synthesis resulted in the polymeric compound [Pb(C(12)H(6)N(2)O(4))](n).
• The lead(II) cation exhibits an irregular N(2)O(6) coordination geometry, chelated by the bipyridine nitrogen atoms and oxygen atoms from four carboxylate groups.
• The carboxylate groups act as bridges, connecting lead(II) centers to form a robust three-dimensional polymer network.
• A specific twist angle of 11.4(3)° was observed between the carboxylate group and the pyridine ring.

Conclusions:

• A novel 3D coordination polymer of lead(II) with 2-2 -bipyridine-5,5 -dicarboxylate has been successfully synthesized and structurally characterized.
• The study highlights the versatility of the bpdc ligand in constructing intricate polymeric architectures with Pb(II).
• The determined structure provides insights into the coordination preferences of Pb(II) in extended systems.