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Coordination complex of Na+ and alpha-D-glucose
1Department of Biochemistry and Biophysics, Iowa State University, Ames 50011.
Summary
The crystal structure of alpha-D-glucose-NaCl reveals sodium ions coordinated by glucose hydroxyls. Chloride ions do not directly interact with sodium in this trigonal crystal formation.
Area of Science:
- Crystallography
- Carbohydrate Chemistry
- Inorganic Chemistry
Background:
- Understanding the crystalline structure of carbohydrate-salt complexes is crucial for various applications.
- The interaction between glucose and sodium chloride (NaCl) is of interest due to the prevalence of both substances.
Purpose of the Study:
- To determine and present the detailed crystal structure of alpha-D-glucose-NaCl.
Main Methods:
- Single-crystal X-ray diffraction was employed to analyze the compound.
- The crystal structure was solved and refined using Mo K alpha radiation.
Main Results:
- The structure of alpha-D-glucose-NaCl (C6H12O6.1/2(NaCl).0.39(H2O)) was determined in the trigonal space group P3(1)21.
- Sodium ions (Na+) are located on a crystallographic twofold axis and coordinated by six hydroxyl groups from four distinct glucose molecules.
- Chloride ions (Cl-) were observed not to engage in direct ionic interactions with the sodium ions.
Conclusions:
- The study elucidates the specific coordination environment of sodium ions within the alpha-D-glucose-NaCl crystal lattice.
- The findings highlight the role of glucose hydroxyls in coordinating cations, while chloride ions exist independently within the structure.