Abstract: Modeling of low-field NMR spectra with indirect spin-spin interaction (J-coupling) is not included in popular NMR software. Modeling NMR spectra for cases of various magnetic fields is ...

The key finding is that as the distance grows greater, the coupling stops growing, and the inconstant constant becomes constant once more. This discovery has profound implications. The CEBAF Large ...

This article proposes a constant-coupling-effect-based PLL (CCE–PLL) to resolve the aforementioned issues. Initially, the feature of the PLL-caused couplings on GCC is explored. It exhibits that the ...

All fractions were systematically profiled by 1 H-NMR. The data were assembled into a 2D contour map, which we call “pseudo-LC-NMR,” and combined with those of UHPLC-HRMS/MS. This further highlighted ...

Since additional coupling is not seen, it can be implied that the fourth ... it is inferred that Compound 1 is ethyl acetate. 1 H NMR (42.5 MHz, neat) δ 3.45 (q, J = 7.1, 2 H, H-1), 1.36 (s, 3 H, H-2’ ...

Figure 1 shows the 1 H NMR spectrum of 200 mM lidocaine in CDCl 3 ... while the methyl groups at 16 and 17 positions bond to the ethylene groups at 14 and 15 positions. No coupling occurs at positions ...

The 600 MHz 1 H NMR spectrum of the ~1:1 mixture of two diastereomers of the shown below cyclobutane derivative was analysed in this manner in order to determine NMR parameters.