Spectroscopic study of phenyl- and 4-pyridylmalondialdehydes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F01%3A00004827" target="_blank" >RIV/60461373:22340/01:00004827 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Spectroscopic study of phenyl- and 4-pyridylmalondialdehydes

Popis výsledku v původním jazyce

4-pyridylmalondialdehyde (1) and phenylmalondialdehyde (2) and their potassium salts were investigated by 1H and 13C NMR, Raman and UV spectroscopy. Three forms of 1 and two forms of 2 were found in water or DMSO solution depending on the pH by means ofUV, 1H and 13C NMR spectroscopy. For 2 the chemical exchange between two cis-enol tautomers was observed, while the structure of 1 in the solution is zwitterionic. From the UV measurements and potentiometric titrations pK1=1.9 # 0.1, pK2=7.2 # 0,1 for 1and pK=4.0 # 0.2 for 2 were evaluated. For 1 the Raman spectra of solid state and DMSO solution are very similar, while for 2 they differ significantly. Butylamine was used as a model compound for the study of the potential interaction of malondialdehy dewith compounds containing amino groups. The effect of addition of butylamine on the spectra of both malondialdehyde derivatives were indistinguishable from that corresponding to protonation-deprotonation processes.

Název v anglickém jazyce

Spectroscopic study of phenyl- and 4-pyridylmalondialdehydes

Popis výsledku anglicky

4-pyridylmalondialdehyde (1) and phenylmalondialdehyde (2) and their potassium salts were investigated by 1H and 13C NMR, Raman and UV spectroscopy. Three forms of 1 and two forms of 2 were found in water or DMSO solution depending on the pH by means ofUV, 1H and 13C NMR spectroscopy. For 2 the chemical exchange between two cis-enol tautomers was observed, while the structure of 1 in the solution is zwitterionic. From the UV measurements and potentiometric titrations pK1=1.9 # 0.1, pK2=7.2 # 0,1 for 1and pK=4.0 # 0.2 for 2 were evaluated. For 1 the Raman spectra of solid state and DMSO solution are very similar, while for 2 they differ significantly. Butylamine was used as a model compound for the study of the potential interaction of malondialdehy dewith compounds containing amino groups. The effect of addition of butylamine on the spectra of both malondialdehyde derivatives were indistinguishable from that corresponding to protonation-deprotonation processes.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CB - Analytická chemie, separace

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2001

Kód důvěrnosti údajů

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

Název periodika

Journal of Molecular Structure

ISSN

0022-2860

e-ISSN

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Svazek periodika

563-564

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

5

Strana od-do

497-501

Kód UT WoS článku

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EID výsledku v databázi Scopus

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