Dicationic Tellurium Analogues of the Classic N‐Heterocyclic Carbene | Zendy

Dutton Jason L. | Zendy; Ragogna Paul J. | Zendy

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Dicationic Tellurium Analogues of the Classic N‐Heterocyclic Carbene

Author(s) -

Dutton Jason L.,

Ragogna Paul J.

Publication year - 2010

Publication title -

chemistry – a european journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.687

H-Index - 242

eISSN - 1521-3765

pISSN - 0947-6539

DOI - 10.1002/chem.201001447

Subject(s) - chemistry , tellurium , carbene , diimine , halide , metathesis , pyridine , polymer chemistry , organic chemistry , polymer , catalysis , polymerization

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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