Diaqua-tetra-bromidotin(IV) trihydrate.

Area of Science:

• Inorganic Chemistry
• Crystallography
• Materials Science

Background:

• Tin tetrabromide (SnBr(4)) is a compound with limited structural characterization, especially in its hydrated forms.
• Understanding the hydration of metal halides is crucial for predicting their reactivity and stability.
• Isostructural relationships between tin tetrachloride and tin tetrabromide hydrates can provide insights into chemical bonding and crystal packing.

Purpose of the Study:

• To characterize the crystal structure of the first isolated hydrate of tin tetrabromide.
• To investigate the coordination environment of tin(IV) and the role of water molecules in the crystal lattice.
• To elucidate the hydrogen bonding network within the tin tetrabromide hydrate structure.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the precise atomic arrangement.
• Chemical analysis confirmed the stoichiometry of the hydrated compound.
• Infrared spectroscopy was used to identify the presence of coordinated and lattice water molecules.

Main Results:

• The title compound, [SnBr(4)(H(2)O)(2)]·3H(2)O, was successfully synthesized and characterized.
• The structure consists of octahedrally coordinated Sn(IV) atoms, with four bromide ligands and two cis-oriented water molecules.
• The crystal lattice features a three-dimensional network formed by O-H⋯O and O-H⋯Br hydrogen bonds involving lattice water molecules.

Conclusions:

• This study reports the first definitive crystal structure of a tin tetrabromide hydrate.
• The compound is isostructural with the corresponding tin tetrachloride hydrate, highlighting similarities in hydration behavior.
• The intricate hydrogen bonding network plays a significant role in stabilizing the three-dimensional crystal structure.