The Influence Of C(Sp(3))H-Selenium Interactions On The(77)Se Nmr Quantification Of The Pi-Accepting Properties Of Carbenes

Guy Bertrand,Glen Junor,Jan Lorkowski,Cory Weinstein,Rodolphe Jazzar,Cezary Pietraszuk

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION（2020）

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摘要

Selenium NMR has become a standard tool for scaling the pi-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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关键词

carbenes, cyclic alkyl amino carbenes, hydrogen bonding, N-heterocyclic carbenes, selenium scale

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