Volume 630, Issue 5 pp. 717-721
Article

Supramolecular Assembling of Complex Tellurium Salts: Synthesis and Crystal Structures of {Cs[PhTeCl4]·CH3OH} and Cs[PhTeBr4]

Ernesto Schulz Lang Prof. Dr.

Corresponding Author

Ernesto Schulz Lang Prof. Dr.

Santa Maria, RS / Brazil, Departamento de Química, Laboratório de Materiais Inorgânicos — Universidade Federal de Santa María

Universidade Federal de Santa Maria, Departamento de Química, Laboratório de Materiais Inorgânicos, 97105 900 Santa Maria, RS / BrazilSearch for more papers by this author
Gelson Manzoni de Oliveira Prof. Dr.

Corresponding Author

Gelson Manzoni de Oliveira Prof. Dr.

Santa Maria, RS / Brazil, Departamento de Química, Laboratório de Materiais Inorgânicos — Universidade Federal de Santa María

Universidade Federal de Santa Maria, Departamento de Química, Laboratório de Materiais Inorgânicos, 97105 900 Santa Maria, RS / BrazilSearch for more papers by this author
Ramão Marceli Fernandes Jr.

Ramão Marceli Fernandes Jr.

Santa Maria, RS / Brazil, Departamento de Química, Laboratório de Materiais Inorgânicos — Universidade Federal de Santa María

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Ezequiel M. Vázquez–López

Ezequiel M. Vázquez–López

Vigo, Galicia / Spain, Departamento de Química Inorgánica, Facultade de Ciencias — Química, Universidade de Vigo

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First published: 20 April 2004
Citations: 12

Abstract

en

The direct reaction between PhTeCl3 and CsCl in methanol affords {Cs[PhTeCl4]·CH3OH}. Cs[PhTeBr4] was prepared by refluxing [2-Br-C5NH5][PhTeBr4] and CsCl in ethanol in the presence of an excess of HBr. In {Cs[PhTeCl4]·CH3OH} the [PhTeCl4] units form dimers by secondary Te···Cl bonds with methanol molecules bridging adjacent Cs+ cations. In both compounds, the alkali metal cation interacts secondarily with the chlorine and bromine Te-ligands, achieving singular coordination polyhedrons and holding the lattices in supramolecular tridimensional assemblies. The new complexes, {Cs[PhTeCl4]·CH3OH} and Cs[PhTeBr4], crystallize in the space groups P21/c and P21/n, respectively. Only one such structure has been reported before.

Abstract

de

Supramolekulare Strukturen komplexer Tellursalze: Synthese und Kristallstrukturen von {Cs[PhTeCl4]·CH3OH} und Cs[PhTeBr4]

Die Reaktion von PhTeCl3 mit CsCl in Methanol führt zur Bildung von {Cs[PhTeCl4]·CH3OH}. Cs[PhTeBr4] wurde aus [2-Br-C5NH5][PhTeBr4] und CsCl in siedendem Ethanol in Gegenwart von überschüssigem HBr hergestellt. In der Struktur von {Cs[PhTeCl4]·CH3OH} sind die [PhTeCl4]-Einheiten über sekundäre Te···Cl-Bindungen zu Dimeren assoziiert, wobei die Methanolmoleüle benachbarte Cs+-Ionen verbrücken. In beiden Verbindungen führen Kontakte zwischen den Alkalimetall-Kationen mit den Halogenoliganden der Telluro-Einheiten zu supramolekularen dreidimensionalen Anordungen. Die neuen Komplexe {Cs[PhTeCl4]·CH3OH} und Cs[PhTeBr4] kristallisieren in den Raumgruppen P21/c bzw. P21/n. Es gibt bis heute hierzu nur ein ähnliches Beispiel.

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