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The influence of electronic modifications on rotational barriers of bis-NHC-complexes as observed by dynamic NMR spectroscopy

✍ Scribed by Kolmer, Andreas; Kaltschnee, Lukas; Schmidts, Volker; Peeck, Lars H.; Plenio, Herbert; Thiele, Christina M.

Book ID
121221968
Publisher
John Wiley and Sons
Year
2013
Tongue
English
Weight
515 KB
Category
Article
ISSN
0749-1581

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Effects of solute–solvent interactions and acid catalysis on the rotational barriers in polarized ethylenes. The significance of large entropies of activation as measured by dynamic NMR
✍ Ulf Berg; Ulf Sjöstrand 📂 Article 📅 1978 🏛 John Wiley and Sons 🌐 English ⚖ 621 KB

## Abstract Complete ^1^H NMR bandshape analysis has been used to study the rotational barrier around the carbon–carbon double bond in two types of polarized ethylenes; on the one hand for planar ketene mercaptals (A), for which the hindered rotation over the 90 degrees twisted transition state is