Cadmium sulfite hexahydrate revisited
Acta Crystallographica. Section E, Structure Reports Online
|January 5, 2011
Summary
This study refines the crystal structure of tetra-cadmium tetra-sulfite hexa-hydrate at low temperatures. The detailed analysis reveals a complex 3D polymer framework built from cadmium centers, sulfite anions, and water molecules, stabilized by extensive hydrogen bonding.
Area of Science:
- Inorganic Chemistry
- Crystallography
- Materials Science
Background:
- The crystal structure of tetra-cadmium tetra-sulfite hexa-hydrate was previously determined at room temperature.
- A need exists for a more precise structural determination at lower temperatures to understand its properties better.
Purpose of the Study:
- To perform a low-temperature structural revision of tetra-cadmium tetra-sulfite hexa-hydrate.
- To elucidate the detailed three-dimensional polymer framework and hydrogen bonding network.
Main Methods:
- Single-crystal X-ray diffraction at 100 K.
- Structural refinement to R = 0.017.
Main Results:
- A precise low-temperature structure of [Cd(4)(SO(3))(4)(H(2)O)(5)]·H(2)O was determined.
- The compound forms a 3D polymer with four distinct cadmium sites (CdO(8) and CdO(6) environments).
- An extensive hydrogen bond network involving all water molecules and sulfite groups was identified.
Conclusions:
- The low-temperature structure provides a more accurate representation of the title compound.
- The intricate 3D framework arises from the coordination of cadmium ions with sulfite ligands and water molecules.
- The hydrogen bonding network plays a crucial role in stabilizing the overall crystal structure.
