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Dicationic Tellurium Analogues of the Classic N-Heterocyclic Carbene

✍ Scribed by Jason L. Dutton; Prof. Paul J. Ragogna

Publisher
John Wiley and Sons
Year
2010
Tongue
English
Weight
289 KB
Volume
16
Category
Article
ISSN
0947-6539

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✦ Synopsis

Abstract

The synthesis and comprehensive characterization of the first dicationic tellurium analogues of N‐heterocyclic carbenes (NHCs) has been reported, in both the +2 and +4 oxidation states. For the +2 oxidation state, a base‐stabilized form of TeCl~2~ is used as the starting material. The dications are isolated by means of halide metathesis and the solid‐state structures confirm the previously calculated diimine bonding arrangement. For Te^IV^, a diamine is used in a high‐yielding dehydrohalogen coupling reaction from TeCl~4~. The dicationic NHC analogue is isolated in a base‐stabilized form through halide abstraction and subsequent coordination by pyridine.

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