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Determining the π-Acceptor Properties of N-Heterocyclic Carbenes by Measuring the 77Se NMR Chemical Shifts of Their Selenium Adducts

Liske, Annika, Verlinden, Kathrin, Buhl, Hannes, Schaper, Klaus, Ganter, Christian·2013·Organometallics

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Abstract

A new method for the assessment of the π-acceptor strength of N-heterocyclic carbenes is presented. The 77 Se chemical shifts of the easily available selenium carbene adducts 1 ·Se– 7 ·Se correlate with the π-acceptor character of the respective carbenes. The observed δ( 77 Se) values cover a range of almost 800 ppm, with increasing π-acidity leading to a downfield shift of the signal.

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Authors: Liske, A., Verlinden, K., Buhl, H., Schaper, K., & Ganter, C.
Venue: Organometallics
Publisher: American Chemical Society (ACS)
Published: 2013-09-24
Volume: 32
Issue: 19
Pages: 5269-5272
ISSN: 0276-7333 (ISSN-L)
1520-6041
DOI: 10.1021/om400858y
OpenAlex: W2325339364
Cited by: 375
References: 32
FWCI: 10.39
Type: journal article
Language: en
Open access: closed

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Determining the π-Acceptor Properties of N-Heterocyclic Carbenes by Measuring the 77Se NMR Chemical Shifts of Their Selenium Adducts

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