Synthesis, structure and reactivity of a cationic bis(N-heterocyclic carbene) complex of thallium.

Authors

Anthony R Leverett, Thomas A Martin-Wells, Joseph M Parr, Marcus L Cole, Alasdair I McKay

Published in

Dalton transactions (Cambridge, England : 2003). Jul 07, 2026. Epub Jul 07, 2026.

Abstract

The cationic bis N-heterocyclic carbene (NHC) thallium species [Tl(IPr)₂][Al{OC(CF₃)₃}₄] (1) and [Tl(IMes)₂][Al{OC(CF₃)₃}₄] (2) (IPr = 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene; IMes = 1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene) have been prepared. The solid-state structures of these species display considerable distortion of the NHC binding to thallium as a result of donation of electron-density from the metal s-type lone-pair orbital into the empty p-orbital of the carbenes. Attempts to utilise 1 and 2 as dual-purpose NHC transfer and halide abstractor compounds with Rh proved to be unsuccessful with the thallium being retained in Rh-Tl-Rh bridging products.

PMID:
42411302
Bibliographic data and abstract were imported from PubMed on 07 Jul 2026.

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