15N Inverse-detected NMR spectra of 1-phenylazo-2-naphthol
✍ Scribed by Antonín Lyc̆ka; Jan Pelnar̆
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 439 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0143-7208
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📜 SIMILAR VOLUMES
The conversion of nitrate (NO 3 À ) to 1-phenylazo-2-naphthol (Sudan-1) has been examined as a method for natural abundance measurement of d 15 N of NO 3 À . The reaction results in dilution of NO 3 À -N with only one reagent-derived N and the product is readily concentrated from dilute samples by
## Abstract Two types of proton‐detected ^1^H^15^N correlation experiments were compared with respect to the observation of ^15^N NMR resonances broadened by scalar relaxation of the second kind. Both single‐ and multiple‐quantum experiments gave equal ^15^N line widths in __F__~1~, and in all cas
The M y proton-coupled 15N NMR spectra of pyrimidine with natural isotope abundance and of bis-labelled [1,3-"N2]p~dine, obtained using single pulse experiments, are described. The "N and 'H spectra are analysed for "J, 'J and 4J(NH) as well as N,N and H,H coupling constants.
## REFERENCE DATA carbons, for various substituent groups and positions were carried out by gated decoupling with NOE. ## RESULTS AND DISCUSSION The I3C NMR chemical shifts of the compounds are shown in Tables 123; 'J(CH) and long-range coupling constants of 2, 9, 13 and 18, measured by gated d