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uv Study of the Protonation of Indole and 3-Substituted Indoles in Perchloric Acid Media

R. Andonovski ; Institut za kemija, PMF, Univerzitet "Sv. Kiril i Metodij«, P.O. Box 162, 91001 Skopje, Macedonia
I. Spirevska ; Institut za kemija, PMF, Univerzitet "Sv. Kiril i Metodij«, P.O. Box 162, 91001 Skopje, Macedonia
A. Nikolovski ; Institut za kemija, PMF, Univerzitet "Sv. Kiril i Metodij«, P.O. Box 162, 91001 Skopje, Macedonia

Puni tekst: engleski, pdf (6 MB) str. 1201-1213 preuzimanja: 364* citiraj
APA 6th Edition
Andonovski, R., Spirevska, I. i Nikolovski, A. (1996). uv Study of the Protonation of Indole and 3-Substituted Indoles in Perchloric Acid Media. Croatica Chemica Acta, 69 (3), 1201-1213. Preuzeto s https://hrcak.srce.hr/177139
MLA 8th Edition
Andonovski, R., et al. "uv Study of the Protonation of Indole and 3-Substituted Indoles in Perchloric Acid Media." Croatica Chemica Acta, vol. 69, br. 3, 1996, str. 1201-1213. https://hrcak.srce.hr/177139. Citirano 29.07.2021.
Chicago 17th Edition
Andonovski, R., I. Spirevska i A. Nikolovski. "uv Study of the Protonation of Indole and 3-Substituted Indoles in Perchloric Acid Media." Croatica Chemica Acta 69, br. 3 (1996): 1201-1213. https://hrcak.srce.hr/177139
Harvard
Andonovski, R., Spirevska, I., i Nikolovski, A. (1996). 'uv Study of the Protonation of Indole and 3-Substituted Indoles in Perchloric Acid Media', Croatica Chemica Acta, 69(3), str. 1201-1213. Preuzeto s: https://hrcak.srce.hr/177139 (Datum pristupa: 29.07.2021.)
Vancouver
Andonovski R, Spirevska I, Nikolovski A. uv Study of the Protonation of Indole and 3-Substituted Indoles in Perchloric Acid Media. Croatica Chemica Acta [Internet]. 1996 [pristupljeno 29.07.2021.];69(3):1201-1213. Dostupno na: https://hrcak.srce.hr/177139
IEEE
R. Andonovski, I. Spirevska i A. Nikolovski, "uv Study of the Protonation of Indole and 3-Substituted Indoles in Perchloric Acid Media", Croatica Chemica Acta, vol.69, br. 3, str. 1201-1213, 1996. [Online]. Dostupno na: https://hrcak.srce.hr/177139. [Citirano: 29.07.2021.]

Sažetak
The protonation of indole, indolyl-3-acetic acid, indolyl-3-propionic
acid and indolyl-3-butyric acid in perchloric acid media was studied
by the methods of ultraviolet spectroscopyin the 320-190 nm region.
The absorbance values were meas ured at several selected wavelengths and the molar absorptivity was calculated. From these values, using the Hammett's equation: pKa = H + 10g[c(BH+)/c(B)]
where H is Ha or Hi (i.e. Hammett's acidity function or its corrected
value), the pKa values for the reaction of protonation were obtained.
The Hammett's postulate (the slopes of the plots log
[c(BH+)/c(B)]vs. H should be equal to 1) was tested. Also, the dissociation constants and the solvent parameter m were obtained by
application of the Excess Acidity Method. The position of the additional
protons in the protonated compounds was discussed.

Hrčak ID: 177139

URI
https://hrcak.srce.hr/177139

Posjeta: 458 *