prikaz prve stranice dokumenta Intriguing salt effects in the formation of hydroxamic acids from aldehydes and nitroso compounds
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Intriguing salt effects in the formation of hydroxamic acids from aldehydes and nitroso compounds
Croatica Chemica Acta, 73 (2000), 3; 715-731. urn:nbn:hr:163:162702
Lovrek, Monika; Pilepić, Viktor; Uršić, Stanko

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Lovrek, M., Pilepić, V. i Uršić, S. (2000). Intriguing salt effects in the formation of hydroxamic acids from aldehydes and nitroso compounds. Croatica Chemica Acta, 73. (3), 715-731. Preuzeto s https://urn.nsk.hr/urn:nbn:hr:163:162702

Lovrek, Monika, et al. "Intriguing salt effects in the formation of hydroxamic acids from aldehydes and nitroso compounds." Croatica Chemica Acta, vol. 73, br. 3, 2000, str. 715-731. https://urn.nsk.hr/urn:nbn:hr:163:162702

Lovrek, Monika, Viktor Pilepić i Stanko Uršić. "Intriguing salt effects in the formation of hydroxamic acids from aldehydes and nitroso compounds." Croatica Chemica Acta 73, br. 3 (2000): 715-731. https://urn.nsk.hr/urn:nbn:hr:163:162702

Lovrek, M., Pilepić, V. i Uršić, S. (2000) 'Intriguing salt effects in the formation of hydroxamic acids from aldehydes and nitroso compounds', Croatica Chemica Acta, 73(3), str. 715-731. Preuzeto s: https://urn.nsk.hr/urn:nbn:hr:163:162702 (Datum pristupa: 20.04.2024.)

Lovrek M, Pilepić V, Uršić S. Intriguing salt effects in the formation of hydroxamic acids from aldehydes and nitroso compounds. Croatica Chemica Acta [Internet]. 2000. [pristupljeno 20.04.2024.];73(3):715-731. Dostupno na: https://urn.nsk.hr/urn:nbn:hr:163:162702

M. Lovrek, V. Pilepić i S. Uršić, "Intriguing salt effects in the formation of hydroxamic acids from aldehydes and nitroso compounds", Croatica Chemica Acta, vol. 73, br. 3, str. 715-731, 2000. [Online]. Dostupno na: https://urn.nsk.hr/urn:nbn:hr:163:162702. [Citirano: 20.04.2024.]

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Naslov (engleski)Intriguing salt effects in the formation of hydroxamic acids from aldehydes and nitroso compounds
AutorMonika Lovrek
AutorViktor Pilepić
MBZ: 200682
AutorStanko Uršić
Autorova ustanovaSveučilište u Zagrebu
Farmaceutsko-biokemijski fakultet
(Zavod za farmaceutsku kemiju)
Autorova ustanovaSveučilište u Zagrebu
Farmaceutsko-biokemijski fakultet
(Zavod za fizikalnu kemiju)
Znanstveno / umjetničko
područje, polje i grana		PRIRODNE ZNANOSTI
Kemija
Fizikalna kemija
Sažetak (engleski)
Addition of inorganic chlorides and perchlorates into the reaction mixture in water leads to a significant increase of the rate constants observed for the formation of <i>N</i>-phenyl hydroxamic acids from nitrosobenzene and formaldehyde or acetaldehyde. The rate enhancements (relative to the reaction rate constant in »pure water«) vary from the 7.4-fold increase observed on addition of 2.0 mol dm<sup>-3</sup> Mg(ClO<sub>4</sub>)<sub>2</sub> into the reaction mixture to the 230.0-fold increase in the case of 2.0 mol dm<sup>-3</sup> of MgCl<sub>2</sub> added. Linear correlation between log <i>k</i><sub>obs</sub> for the formation of the <i>N</i>-phenylformohydroxamic acid from nitrosobenzene and formaldehyde and the concentration of the anion of the salt added has been observed for MgCl<sub>2</sub>, CaCl<sub>2</sub>, LiCl, Mg(ClO<sub>4</sub>)<sub>2</sub> and NaClO<sub>4</sub>, but different correlations were obtained for NaCl, HCl and HClO<sub>4</sub>. The observations are discussed in terms of ion pairing between the unstable cation reaction intermediates and the anion of the salt. The results obtained suggest that stabilization of the unstable cationic reaction intermediate by the formation of an ion pair with the salt anion is of key importance for the formation of hydroxamate from aldehydes and nitrosobenzenes in more concentrated inert salt water Solutions.
Ključne riječi (engleski)
Jezikengleski
Vrsta publikacijeZnanstveni rad - Izvorni znanstveni rad
Status objaveObjavljen
Vrsta recenzijeRecenziran - međunarodna recenzija
Verzija publikacijeObjavljena verzija rada (izdavačev PDF)
Naslov časopisaCroatica Chemica Acta
Brojčani podacivol. 73, br. 3, str. 715-731
p-ISSN0011-1643
e-ISSN1334-417X
URN:NBNurn:nbn:hr:163:162702
Datum objave publikacije2000
URL dokumentahttps://hrcak.srce.hr/132011
Vrsta resursaTekst
Prava pristupaOtvoreni pristup
Uvjeti korištenjaIkona licence Zaštićeno autorskim pravom.
Datum i vrijeme pohrane2020-04-29 11:21:48