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The Influence of C(sp3 )H-Selenium Interactions on the 77 Se NMR Quantification of the π-Accepting Properties of Carbenes.

Abstract

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.

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