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Article Dans Une Revue Chemical Science Année : 2023

Evidence for and Evaluation of Fluorine-Tellurium Chalcogen Bonding

Résumé

In the field of noncovalent interactions, chalcogen bonding (ChB) involving the tellurium atom is currently attracting much attention in supramolecular chemistry and in catalysis. However, as a prerequisite for its application, the ChB should be studied in solution to assess its formation and, if possible, to evaluate its strength. In this context, new tellurium derivatives bearing CH 2 F and CF 3 groups were designed to exhibit Te•••F ChB and were synthesized in good to high yields. In both types of compounds, Te•••F interactions were characterized in solution by combining 19 F, 125 Te and HOESY NMR techniques. These Te•••F ChBs were shown to contribute to the overall J Te-F coupling constants (94-170 Hz) measured in the CH 2 F-and CF 3based tellurium derivatives. Finally, a variable temperature NMR study allowed us to approximate the energy of the Te•••F ChB, from 3 kJ/mol for the compounds for weak Te -holes to 11 kJ/mol for Te -holes activated by the presence of strong electron withdrawing substituents. .

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Chimie
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Dates et versions

hal-04118408 , version 1 (06-06-2023)

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Robin Weiss, Emmanuel Aubert, Loic Groslambert, Patrick Pale, Victor Mamane. Evidence for and Evaluation of Fluorine-Tellurium Chalcogen Bonding. Chemical Science, 2023, ⟨10.1039/D3SC00849E⟩. ⟨hal-04118408⟩
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