Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
315 0 |
SM ISO690:2012 DRUMEA, Maria, MAKAEV, Fliur, VALICA, Vladimir. Identification of nitrotriazone by nuclear magnetic resonance 1H, 13C. In: Revista de Ştiinţe ale Sănătăţii din Moldova, 2022, nr. 3 An.1(29), p. 503. ISSN 2345-1467. |
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Revista de Ştiinţe ale Sănătăţii din Moldova | ||||||
Numărul 3 An.1(29) / 2022 / ISSN 2345-1467 | ||||||
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Pag. 503-503 | ||||||
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Background. Nuclear magnetic resonance (NMR) is a highperformance instrumental analytical method that allows elucidation and confirmation of the steric structure of organic compounds. NMR is based on measuring the absorption of electromagnetic radiation by the method: 1H NMR,13C NMR. Objective of the study. Identification and confirmation of the steric structure of Nitrotriazone by the method of nuclear magnetic resonance with the 1H proton and 13C carbon technique. Material and Methods. 1H and 13C NMR spectra were recorded for 2% d6-DMSO solutions using a „Bruker-Avance III” (400.13 and 100.61 MHz). The chemical changes δ were expressed in ppm, referring to the center of the signal, using the solvent peaks as reference: d6-DMSO 2.50 ppm. Results. In the 1H NMR spectrum of Nitrotriazon the chemical shifts, have values in the range of 8.7-7.1 ppm. The signals at 8.72 and 8.27 ppm belong to the protons of the 1,2,4-triazole group. The bands at 8.13; 7.78; 7.71; 7.59 and 7.21 ppm are decomposed into peaks called doublets. The doublet at 8.13 and 7.21 ppm is attributed to four protons in the p-nitrophenyl substituent. Vinyl strips and aromatic ring are in the region of 7.82-7.59 ppm. In the 13C NMR spectrum, signals at 189.9 ppm belong to the C = O group; 153.2 and 146.7 ppm are attributed to the triazole ring. The peak at 148.7 ppm belongs to the carbon in the nitro group in the aromatic ring. Conclusion. The 1H proton and 13C carbon spectra of Nitrotriazone were investigated, highlighting absorption bands, which distinguish Nitrotriazone from other substances and allow their use to identify and confirm the steric structure. |
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Cuvinte-cheie Nitrotriazone, 1H NMR, 13C NMR, DMSO (Dimethylsulfoxide), Nitrotriazon, RMN1H, RMN13C, DMSO (Dimetilsulfoxid) |
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