Building new discrete supramolecular assemblies through the interaction of iso-tellurazole N-oxides with Lewis acids and bases

The supramolecular macrocycles spontaneously assembled by iso-tellurazole N-oxides are stable towards Lewis bases as strong as N-heterocyclic carbenes (NHC) but readily react with Lewis acids such as BR (R = Ph, F). The electron acceptor ability of the tellurium atom is greatly enhanced in the resul...

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Bibliographic Details
Published inFaraday discussions Vol. 203; pp. 187 - 199
Main Authors Ho, Peter C, Jenkins, Hilary A, Britten, James F, Vargas-Baca, Ignacio
Format Journal Article
LanguageEnglish
Published England Royal Society of Chemistry 2017
Subjects
Acetonitrile
Adducts
Carbenes
Tellurium
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Summary:The supramolecular macrocycles spontaneously assembled by iso-tellurazole N-oxides are stable towards Lewis bases as strong as N-heterocyclic carbenes (NHC) but readily react with Lewis acids such as BR (R = Ph, F). The electron acceptor ability of the tellurium atom is greatly enhanced in the resulting O-bonded adducts, which consequently enables binding to a variety of Lewis bases that includes acetonitrile, 4-dimethylaminopyridine, 4,4'-bipyridine, triphenyl phosphine, a N-heterocyclic carbene and a second molecule of iso-tellurazole N-oxide.
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ISSN:1359-6640
1364-5498
DOI:10.1039/C7FD00075H