Crystal structure of K₆[Zn(CO₃)₄]

Area of Science:

• Inorganic Chemistry
• Crystallography
• Materials Science

Background:

• Understanding the coordination chemistry of zinc is crucial for developing new materials.
• Carbonate ligands play a significant role in the structure and properties of inorganic compounds.
• Potassium-containing compounds are essential in various industrial applications.

Purpose of the Study:

• To elucidate the crystal structure of K6[Zn(CO3)4], hexa-potassium tetra-carbonato-zincate(II).
• To analyze the coordination environment of the zinc(II) ion and potassium cations.
• To investigate the bonding interactions and framework assembly in the title compound.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the crystal structure.
• Crystal structure analysis involved identifying atomic positions, bond lengths, and coordination geometries.
• Interatomic distances were calculated to define coordination numbers and bonding interactions.

Main Results:

• The crystal structure of K6[Zn(CO3)4] was determined in the space group C2/c.
• The zinc(II) atom is tetrahedrally coordinated by four monodentate carbonate groups.
• Potassium cations exhibit coordination numbers ranging from 6 to 8, interacting with oxygen atoms of carbonate groups.

Conclusions:

• The study provides a detailed structural characterization of hexa-potassium tetra-carbonato-zincate(II).
• The framework is built by the sharing of oxygen atoms between [KOx] polyhedra and [Zn(CO3)4]6- anions.
• The findings contribute to the understanding of carbonate coordination in zinc complexes.