Affiliation:
1. School of Natural Sciences Department of Chemistry Catalysis Research Center and Institute of Silicon Chemistry Technische Universität München Lichtenbergstr. 4 85748 Garching bei München Germany
2. Department of Pure and Applied Chemistry University of Strathclyde 295 Cathedral St Glasgow G1 1XL Scotland UK
Abstract
AbstractFacile access to dimeric heavier aluminum 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 aluminum 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 aluminum chalcogenide in the form of a tetracoordinate aluminum 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 aluminum complex containing a dianionic tellurocarbonate ligand [CO2Te]2−, which is the first example of tellurium analogue of a carbonate [CO3]2−.
Funder
H2020 European Research Council