Nuclear magnetic resonance inverse

Inverse-Detected 15N Nuclear Magnetic Resonance Experiments... 

An elegant solution to the problem has been provided by tin measurement of the nuclear magnetic resonance spectra, which permits a direct determination of the inversion frequency. The spectra of A -subetituted aziridines such ns (VIH), (IX), and (X) showed that Hie substituent on the nitrogen docs not lie in tho piano of the ring. However, the inversion frequency is so high that resolution of such molecules in the most favorable ease is likely to be possible only at tem fiora-turee below -500.". "... 

Nuclear magnetic resonance (NMR) spectroscopy has been used extensively to study the conformation of a number of diazetidines, their thermodynamic stability, and kinetics of inversion at the N-center in addition to the routine structural elucidation. 

Water Associated with the External Contour of Tactoids. The existence of tactoids can be evidenced by studying th longitudinal relaxation time of the nuclear magnetic resonance of H or H in aqueous slurries (7-8). In simple terms, the relaxation rate, e.g. the inverse of the relaxation time, is the sum of three terms... 

A silver-silyl intermediate was detected by Si nuclear magnetic resonance (NMR) at 5 = 97 ppm and inverse saturation behavior was detected with mono-substituted alkenes. Based on their studies, a silver-mediated reversible releasing of silylene followed by an irreversible electrophilic addition of the silver-silyl intermediate to the alkene was suggested (Fig. 32). 

Clore GM, et al. Analysis of the backbone dynamics of interleukin-1 beta using two-dimensional inverse detected heteronuclear 15N-1H NMR spectroscopy. Biochemistry 1990 29 7387-7401. Aue WP, Bartholdi E, Ernst RR. Two-dimensional spectroscopy. Application to nuclear magnetic resonance. J. Chem. Phys. 1976 64 p. 2229-2246. 

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