## Abstract The application of selective population inversion (SPI) to the assignment of ^13^C resonances and to the determination of the relative sign of ^13^C^1^H coupling constants is demonstrated for 1‐phenyl‐1,2‐dibromo‐2‐nitroethane. A negative sign for the geminal C‐2H‐1 coupling constant
Determination of long-range proton-carbon 13 coupling constants with selective two-dimensional INEPT
✍ Scribed by T Jippo; O Kamo; K Nagayama
- Publisher
- Elsevier Science
- Year
- 1986
- Weight
- 299 KB
- Volume
- 66
- Category
- Article
- ISSN
- 0022-2364
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## Abstract Long‐range ^13^C^1^H coupling constants were measured by using multiple‐site selective excitation followed by polarization transfer and acquisition under band‐selective proton decoupling conditions. The multiple‐site proton decoupling eliminates splittings due to homonuclear spin coupl
## Abstract 2D __J__—δ selective INEPT experiments were used to measure long‐range ^13^C,^1^H coupling constants for the macrolide antibiotics roxithromycin, erythromycin and their metabolites, RU 39001 and erythralosamine, respectively. The 2D __J__—δ selective INEPT experiment was performed using
A new technique is described which enables accurate values of heteronuclear long-range coupling constants to be obtained from highly distorted multiplets in two-dimensional correlation spectra. The technique uses a simple data fitting of the distorted multiplet with a model obtained from the convent