Barium bis-[tetra-fluorido-bromate(III)]

Area of Science:

• Inorganic Chemistry
• Crystallography
• Solid-State Chemistry

Background:

• Barium bis-[tetra-fluorido-bromate(III)], Ba[BrF4]2, is a compound previously characterized using powder diffraction.
• Understanding the precise atomic arrangement in inorganic compounds is crucial for predicting their properties.

Purpose of the Study:

• To refine the crystal structure of barium bis-[tetra-fluorido-bromate(III)], Ba[BrF4]2, using single-crystal X-ray diffraction.
• To provide a more detailed understanding of the coordination environment and atomic interactions within the crystal lattice.

Main Methods:

• Synthesis of single crystals of Ba[BrF4]2.
• Single-crystal X-ray diffraction data collection.
• Crystal structure refinement with anisotropic displacement parameters.

Main Results:

• Confirmation of the previously proposed crystal structure model for Ba[BrF4]2.
• Refinement of all atomic positions with anisotropic displacement parameters, offering a more accurate description of atomic motion.
• Identification of two distinct barium cations, each coordinated by twelve fluorine atoms, and an almost square-planar [BrF4]- anion.
• The compound crystallizes in the Ba[AuF4]2 structure type.

Conclusions:

• The single-crystal X-ray diffraction study provides a high-resolution structural model for Ba[BrF4]2.
• The detailed structural information enhances the understanding of bonding and coordination in fluorobromate compounds.
• The findings validate previous powder diffraction results and offer a more precise structural description.