The Influence of C(sp3 )H-Selenium Interactions on the 77 Se NMR Quantification of the π-Accepting Properties of Carbenes.
Glen P JunorJan LorkowskiCory M WeinsteinRodolphe JazzarCezary PietraszukGuy BertrandPublished in: Angewandte Chemie (International ed. in English) (2020)
Selenium NMR has become a standard tool for scaling the π-accepting character of carbenes. Herein, we highlight that non-classical hydrogen bonding (NCHB), likely resulting from hyperconjugation, can play a significant role in the carbene-selenium 77 Se NMR chemical shift, thus triggering a non-linear behavior of the Se-Scale.