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TlPO3 and its comparison with isotypic RbPO3 and CsPO3
1Institute for Chemical Technologies and Analytics, Division of Structural Chemistry, TU Wien, Getreidemarkt 9/164-SC, A-1060 Vienna, Austria.
Acta Crystallographica. Section E, Crystallographic Communications
|September 17, 2020
Summary
The crystal structure of thallium(I) polyphosphate (TlPO3) reveals a unique coordination of thallium atoms. Unlike related compounds, the stereoactivity of the thallium lone pair is not evident in this structure.
Area of Science:
- Inorganic Chemistry
- Crystal Structure Analysis
- Solid-State Chemistry
Background:
- Thallium(I) compounds are known for the stereoactivity of their 6s² lone pair.
- Polyphosphates exhibit diverse chain structures and cation coordination.
Purpose of the Study:
- To elucidate the crystal structure of thallium(I) catena-polyphosphate (TlPO3).
- To investigate the coordination environment and lone pair behavior of Tl(I) in TlPO3.
- To compare the structure of TlPO3 with isotypic rubidium and cesium polyphosphates.
Main Methods:
- Single-crystal X-ray diffraction was used to determine the atomic arrangement.
- Quantitative structural analysis was performed for comparison with related compounds.
Main Results:
- TlPO3 features a polyphosphate chain with a repeating unit of two tetrahedra, oriented along the [010] direction.
- The Tl(I) atom exhibits a distorted [6+1] coordination, forming a monocapped prism with oxygen atoms.
- The longest Tl-O bond is observed with the bridging oxygen atom of the polyphosphate chain.
Conclusions:
- The stereoactivity of the Tl(I) 6s² lone pair is not apparent in the crystal structure of TlPO3.
- Structural comparison with RbPO3 and CsPO3 highlights differences in Tl(I) coordination and lone pair behavior.
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