N-15 NMR study of (E)- and (Z)-2-(2-(2-hydroxy-4-nitrophenyl)hydrazono)-1-phenylbutane-1,3-diones. A suitable method for analysis of hydrazone isomers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62690094%3A18470%2F18%3A50014359" target="_blank" >RIV/62690094:18470/18:50014359 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0143720817318429" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0143720817318429</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.dyepig.2017.10.023" target="_blank" >10.1016/j.dyepig.2017.10.023</a>

Jazyk výsledku

angličtina

Název v původním jazyce

N-15 NMR study of (E)- and (Z)-2-(2-(2-hydroxy-4-nitrophenyl)hydrazono)-1-phenylbutane-1,3-diones. A suitable method for analysis of hydrazone isomers

Popis výsledku v původním jazyce

The one- and two-dimensional N-15 NMR spectra of (E)- and (Z)-2-(2-(2-hydroxy-4-nitrophenyl)hydrazono)-1-phenylbutane-1,3-diones (1) were measured and analysed and N-15 chemical shifts and (1)J (N-15, H-1) coupling constants were used for characterization of these two compounds from the viewpoint of azo-hydrazo tautomerism. Both compounds exist completely in appropriate hydrazo forms in dimethyl sulfoxide. Advantages of N-15 NMR spectroscopy application in determination of acidic proton positions and azo-hydrazo content determination are discussed. We would like to propose the application of 15N NMR data measured at the natural abundance level of N-15 as the &quot;first glance&quot; and strongest evidence method for the existence of hydrazo form in azo dyes and for differentiation of E- and Z-isomers around C = N-beta double bond.

Název v anglickém jazyce

N-15 NMR study of (E)- and (Z)-2-(2-(2-hydroxy-4-nitrophenyl)hydrazono)-1-phenylbutane-1,3-diones. A suitable method for analysis of hydrazone isomers

Popis výsledku anglicky

The one- and two-dimensional N-15 NMR spectra of (E)- and (Z)-2-(2-(2-hydroxy-4-nitrophenyl)hydrazono)-1-phenylbutane-1,3-diones (1) were measured and analysed and N-15 chemical shifts and (1)J (N-15, H-1) coupling constants were used for characterization of these two compounds from the viewpoint of azo-hydrazo tautomerism. Both compounds exist completely in appropriate hydrazo forms in dimethyl sulfoxide. Advantages of N-15 NMR spectroscopy application in determination of acidic proton positions and azo-hydrazo content determination are discussed. We would like to propose the application of 15N NMR data measured at the natural abundance level of N-15 as the &quot;first glance&quot; and strongest evidence method for the existence of hydrazo form in azo dyes and for differentiation of E- and Z-isomers around C = N-beta double bond.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10401 - Organic chemistry

Projekt

—

Návaznosti

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Rok uplatnění

2018

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Dyes and pigments

ISSN

0143-7208

e-ISSN

—

Svazek periodika

150

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

4

Strana od-do

181-184

Kód UT WoS článku

000427332200024

EID výsledku v databázi Scopus

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