Aryltellurenyl iodides

A more recent report describes the regio- and stereoselective addition of aryltellurenyl iodides (prepared in situ from the corresponding ditellurides and iodine) to alkynes to afford the ( )-l-iodo-2-aryltelluro-l-alkenes, which treated with bromine give the corresponding dibromides. ... 

With the exception of 2-naphthyltellurenyl iodide, the unsubstituted members are, however, thermally unstable in the solid state. Therefore, to exploit their highly electrophilic character, aryltellurenyl halides are not isolated, instead being generated in situ and used directly for further conversion. - ... 

Finally, an aryltellurenyl cation stabilized by an NHC was prepared by Beckmann et al. from the reactions of aryltellurenyl halides with ImMe4 (Figure 15.48). Both [ArTe-NHC][I] and [ArTe-NHC] [ArTeCl2] (Ar = 2,6-bis (2,4,6-trimethylphenyl)phenyl, X = Cl) were isolated and characterized. In the iodide salt the Te—C carbene bond length is 2.161(2) A, while in the [ArTeCy salt the length is 2.091(8)A. DFT calculations and NBO analyses were also carried out [274]. 

---

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ ]

---