An aluminium telluride with a terminal Al=Te bond and its conversion to an aluminium tellurocarbonate by CO2 reduction

Huihui Xu, Arseni Kostenko, Catherine Weetman, Shiori Fujimori, Shigeyoshi Inoue

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Abstract

Facile access to dimeric heavier aluminium chalcogenides [(NHC)Al(Tipp)-µ-Ch]2 (NHC = IiPr (1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene, IMe4 (1,3,4,5-tetramethylimidazol-2-ylidene); Tipp = 2,4,6-iPr3C6H2; Ch = Se, Te) by treatment of NHC-stabilized aluminium dihydrides with elemental Se and Te is reported. The higher affinity of IMe4 in comparison with IiPr toward the Al center in [(NHC)Al(Tipp)-µ-Ch]2 can be used for ligand exchange. Additionally, the presence of excess IMe4 allows for cleavage of the dimers to form a rare example of a neutral multiply bonded heavier aluminium chalcogenide in the form of a tetracoordinate aluminium complex, (IMe4)2(Tipp)Al=Te. This species reacts with three equivalents of CO2 across two Al–CNHC and the Al=Te bond affording a pentacoordinate aluminium complex containing a dianionic tellurocarbonate ligand [CO2Te]2-, which is the first example of tellurium analogue of a carbonate [CO3]2-.
Original languageEnglish
Article numbere202216021
Number of pages8
JournalAngewandte Chemie
Volume135
Issue number11
Early online date12 Jan 2023
DOIs
Publication statusPublished - 6 Mar 2023

Keywords

  • aluminium telluride
  • aluminium selenide
  • CO2 activation
  • tellurocarbonate
  • chalcogen

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