Structure of strontium citrate pentahydrate

Area of Science:

• Inorganic Chemistry
• Crystallography
• Materials Science

Background:

• Strontium compounds have diverse applications, necessitating a detailed understanding of their solid-state structures.
• Citrate ligands are known to form stable complexes with various metal ions.

Purpose of the Study:

• To elucidate the crystal structure of tristrontium bis(2-hydroxy-1,2,3-propanetricarboxylate) pentahydrate.
• To characterize the coordination environment of strontium ions and the conformation of citrate ligands.
• To identify hydrogen bonding interactions within the crystal structure.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the crystal structure.
• Analysis of bond distances and angles to describe coordination geometries.
• Identification of hydrogen bonds using crystallographic data.

Main Results:

• The crystal structure of tristrontium bis(2-hydroxy-1,2,3-propanetricarboxylate) pentahydrate was successfully determined.
• Strontium ions exhibit varying coordination numbers (8, 9, and 10) with oxygen atoms from citrate ligands.
• Citrate ions adopt an extended conformation, and 11 hydrogen bonds were identified in the asymmetric unit.

Conclusions:

• The study provides a precise structural description of this strontium-citrate complex.
• The coordination diversity of strontium ions highlights their adaptability in forming complexes.
• Understanding the hydrogen bonding network is crucial for predicting material properties.