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K(2)SrNb(6)Cl(18), dipotassium strontium hexaniobium octadecachloride
Thirumalai Duraisamy1, Abdessadek Lachgar
1Department of Chemistry, Wake Forest University, Winston-Salem, NC 27109, USA.
Summary
Dipotassium strontium hexaniobium octadecachloride features unique [Nb(6)Cl(i)(12)Cl(a)(6)](4-) cluster units. These units form a face-centered cubic lattice, with potassium and strontium cations linking them together.
Area of Science:
- Inorganic chemistry
- Solid-state chemistry
- Crystallography
Background:
- The study focuses on the complex inorganic compound dipotassium strontium hexaniobium octadecachloride.
- Understanding the structural motifs of transition metal clusters is crucial in solid-state chemistry.
Purpose of the Study:
- To elucidate the crystal structure of dipotassium strontium hexaniobium octadecachloride.
- To describe the coordination environment of the cations within the lattice.
Main Methods:
- X-ray crystallography was employed to determine the atomic arrangement.
- Analysis of bond distances and coordination numbers provided structural insights.
Main Results:
- The structure is characterized by [Nb(6)Cl(i)(12)Cl(a)(6)](4-) cluster units with -3 symmetry.
- Potassium cations occupy tetrahedral sites, coordinated to 12 chloride ligands.
- Strontium cations reside in octahedral sites, bonded to six outer chloride ligands.
Conclusions:
- The crystal structure reveals a novel arrangement of hexaniobium chloride clusters linked by potassium and strontium cations.
- The coordination of cations highlights the intricate bonding within this inorganic compound.