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Relaxation Dispersion NMR to Reveal Fast Dynamics in Brønsted Acid Catalysis: Influence of Sterics and H-bond Strength on Conformations and Substrate Hopping

Lokesh, N. ; Hioe, J. ; Gramüller, J ; Gschwind, R. M.



Abstract

NMR provides both structural and dynamic information, which is key to connecting intermediates and to understanding reaction pathways. However, fast exchanging catalytic intermediates are often inaccessible by conventional NMR due its limited time resolution. Here, we show the combined application of the H-1 off-resonance R-1 rho NMR method and low temperature (185-175 K) to resolve intermediates ...

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