Potassium oxalurate monohydrate.

Area of Science:

• Coordination Chemistry
• Crystal Engineering
• Materials Science

Background:

• Oxaluric acid and potassium hydroxide (KOH) are common chemical reagents.
• Coordination polymers offer tunable properties based on metal-ligand interactions.

Purpose of the Study:

• To synthesize and characterize a new coordination polymer involving potassium and oxalurate.
• To elucidate the crystal structure and bonding modes within the material.

Main Methods:

• Crystallization from an aqueous solution of oxaluric acid and KOH.
• Single-crystal X-ray diffraction analysis to determine the atomic arrangement and coordination geometry.

Main Results:

• The title salt, poly[aqua-μ(3)-oxalurato-potassium(I)], was synthesized and its crystal structure determined.
• Potassium cations are eight-coordinated by oxalurate ligands and water molecules in a distorted square-anti-prismatic geometry.
• The oxalurate ligand acts as a μ(3)-bridging ligand, forming a 3D network stabilized by N-H⋯O and O-H⋯O hydrogen bonds.

Conclusions:

• The study successfully synthesized and characterized a novel potassium oxalurate coordination polymer.
• The intricate 3D network structure arises from the bridging coordination of the oxalurate ligand and hydrogen bonding interactions.
• This work contributes to the understanding of coordination chemistry and the design of novel network materials.