Protonation constants of some N-substituted thiophene-2-carboxamidoximes

Autor:	Esma Kılıç, Yaşar Dürüst, M. Abdülkadir Akay, Nedime Dürüst
Rok vydání:	1999
Předmět:	Steric effects Aqueous solution Chemistry Potentiometric titration Inorganic chemistry Acid–base titration Protonation Biochemistry Analytical Chemistry chemistry.chemical_compound Ionic strength Thiophene Environmental Chemistry Physical chemistry Moiety Spectroscopy
Zdroj:	Analytica Chimica Acta. 392:343-346
ISSN:	0003-2670
DOI:	10.1016/s0003-2670(99)00220-2
Popis:	The stoichiometric protonation constants of some N-substituted thiophene-2-carboxamidoximes have been determined in 50% ethanol–water mixture (v/v) at ionic strength of 0.1 M NaClO 4 and at 25°C. A potentiometric titration method was used and calculation was done by using recently developed software. Variations of the protonation constant of these compounds were discussed in view of structural effects exerted on amino nitrogen and thiophenyl moiety by the substituents.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ddf05b14d1562ab3769fcbc2715e0f03 https://doi.org/10.1016/s0003-2670(99)00220-2 Zobrazit plný text záznamu Full Text from ScienceDirect