1SN chemical shifts

Deuterium isotope effects on 1SN chemical shifts Deuterium isotope effects on 15N chemical shifts AN(D), similarly as for AC(D), can be employed in determination of mole fraction of the proton transferred form Schiff bases.44 A similar correlation between the mole fraction of NFI-form and AN(D) values was found (Figure 2). For the Schiff bases in which proton transfer takes place, the AN(D) values varied from —2 to + 5 ppm and depend on solvent and temperature. The AN(D) values of... 

Most of these studies relate to derivatives of one ring system triazolo[l,5-tf]pyrimidine. 13C and 1SN chemical shifts of some 5,7-disubstituted [l,2,4]triazolo[l,5- ]pyrimidines substituted in the pyrimidine ring (and also some of their Au(m) chloride complexes) were published by Sztyk et al. <2002MRC529> the data are shown in Table 1. 

Fushman, D. and D. Cowburn, Nuclear magnetic resonance relaxation in determination of residue-specific 1SN chemical shift tensors in proteins in solution protein dynamics, structure, and applications of transverse relaxation optimized spectroscopy, in Methods Enzymol. T. James, U. Schmitz, and V. Doetsch, Editors. 2001. p.109-126. 

TABLE 16. 1SN chemical shifts of nitroso compounds in CDCI3 measured with respect to 4.5M NH4NO3... 

Physisorbed pyridine, which on exposure to air slowly picks up water with the resulting change of the 1SN chemical shift from 64 to 78 ppm ... 

MULTINUCLEAR NMR OF AZO DYES AND THEIR METAL COMPLEXES 17 Omura et al.79 reported <5(1SN) chemical shifts in compounds 19 (Table 8). 

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