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Lewis Superacidic Tellurenyl Cation-Induced Electrophilic Activation of an Inert Carborane
- 1.0546386 - ÚACH 2022 RIV DE eng J - Journal Article
Hejda, M. - Duvinage, D. - Lork, E. - Lyčka, A. - Černošek, Z. - Macháček, Jan - Makarov, S. - Ketkov, S. - Mebs, S. - Dostál, L. - Beckmann, J.
Lewis Superacidic Tellurenyl Cation-Induced Electrophilic Activation of an Inert Carborane.
Chemistry - A European Journal. Roč. 27, č. 59 (2021), s. 14577-14581. ISSN 0947-6539. E-ISSN 1521-3765
Institutional support: RVO:61388980
Keywords : bond activation * boron * carboranes * Lewis superacids * tellurium
OECD category: Inorganic and nuclear chemistry
Impact factor: 5.020, year: 2021
Method of publishing: Open access
The aryltellurenyl cation [2-(tBuNCH)C6H4Te]+, a Lewis super acid, and the weakly coordinating carborane anion [CB11H12]−, an extremely weak Brønsted acid (pKa=131.0 in MeCN), form an isolable ion pair complex [2-(tBuNCH)C6H4Te][CB11H12], in which the Brønsted acidity (pKa 7.4 in MeCN) of the formally hydridic B−H bonds is dramatically increased by more than 120 orders of magnitude. The electrophilic activation of B−H bonds in the carborane moiety gives rise to a proton transfer from boron to nitrogen at slightly elevated temperatures, as rationalized by the isolation of a mixture of the zwitterionic isomers 12- and 7-[2-(tBuN{H}CH)C6H4Te(CB11H11)] in ratios ranging from 62 : 38 to 80 : 20.
Permanent Link: http://hdl.handle.net/11104/0324928
File Download Size Commentary Version Access Lewis.pdf 0 2.5 MB CC BY 4.0 licence Publisher’s postprint open-access Lewis SI.pdf 0 8.4 MB CC BY 4.0 licence Publisher’s postprint open-access
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