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Combining Solid-state and Solution-based Techniques: Synthesis and Reactivity of ChalcogenidoplumbatesII or IV
Published on: December 29, 2016
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Coordination Variability through Inner-Outer-Sphere Chloride Exchange in Complex Heterometallic Clusters
S M Gayomi K Samarakoon1, Spencer R Watts1, George D Tisdale1
1Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States.
Inorganic Chemistry
|December 3, 2025
Summary
Novel bismuth cluster salts were synthesized using Lewis acidic ionic liquids (LAILs). Chloride content controls cluster symmetry and bonding, offering a route to tune Bi-rich materials.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Solid-State Chemistry
Background:
- Exploration of novel heterometallic clusters is crucial for advancing materials science.
- Lewis acidic ionic liquids (LAILs) offer unique reaction environments for complex synthesis.
- Bismuth-based clusters present opportunities for tunable electronic and structural properties.
Purpose of the Study:
- To discover and characterize novel heterometallic bismuth-bearing cluster salts.
- To investigate the influence of synthesis conditions, particularly chloride content, on cluster structure and symmetry.
- To understand the electronic structure and bonding within these novel cluster systems.
Main Methods:
- Synthesis of novel cluster salts using Lewis acidic ionic liquid (LAIL)-assisted methods at 180 °C.
- Structural characterization of monoclinic and triclinic cluster salts using X-ray diffraction.
- Detailed electronic structure and bonding analysis of the synthesized clusters.
Main Results:
- Discovery of five novel heterometallic bismuth-bearing cluster salts in two structural families: α-[M2Bi14Cl4][TrCl4]4 and [M2Bi14Cl2][AlCl4]6.
- Identification of a central binuclear inorganic cluster cation [(Bi5)M(Bi4Clx)M(Bi5)](4,6)+ where chloride content dictates charge, symmetry, and anion count.
- Observation of Bi-Bi bond strengthening and weakening within bismuth sub-clusters, with minor influence of transition metal type (Ru, Os) on symmetry.
Conclusions:
- Inner-outer-sphere chloride exchange in LAILs, controlled by AlCl3 concentration, is a viable method for tuning cluster properties.
- Periodic substitutions offer a pathway to control symmetry, bonding, and interconversion in bismuth-rich clusters.
- The study provides fundamental insights into the synthesis and structure-property relationships of complex bismuth clusters.
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