… anisotropic effect of functional groups in 1H NMR spectra is the molecular response property of spatial nucleus independent chemical shifts (NICS)—Conformational …
E Kleinpeter, A Lämmermann, H Kühn
文献索引：Kleinpeter, Erich; Laemmermann, Anica; Kuehn, Heiner Organic and Biomolecular Chemistry, 2011 , vol. 9, # 4 p. 1098 - 1111
The inversion of the flexible five-membered ring in tetrahydrodicyclopentadiene (TH-DCPD) derivatives remains fast on the NMR timescale even at 103 K. Since the intramolecular exchange process could not be sufficiently slowed for spectroscopic evaluation, the conformational equilibrium is thus inaccessible by dynamic NMR. Fortunately, the spatial magnetic properties of the aryl and carbonyl groups attached to the DCPD skeleton can ...
