Mixed acidic constants (pK′a) of quinolinium oximes [1-(2-phenyl-2-hydroxyiminoethyl)-1-quinolinium chloride (F-1), 1-(2-phenyl-2-hydroxyiminoethyl)-1-isoquinolinium chloride (F-2), 1-(2-phenyl-2-hydroxyiminoethyl)-1-(4′-methyl)-quinolinium chloride (F-3), and 1-(2-phenyl-2-hydroxyiminoethyl)-1-(6′-methyl)-quinolinium chloride (F-4)] have been determined via their UV absorption spectra recorded in the series of Britton-Robinson's buffer solutions in the pH region 8.74-11.28 (t=25±0.5°C, μ=0.2). The obtained pK′a values are in good agreement with those achieved by applying graphical methods. The following pK′a values have been obtained: 9.93 for F-1, 9.90 for F-2, and 10.02 for F-3 and F-4. On the basis of potentiometric titrations thermodynamic acidic constants (pKa) of compounds F-1, F-2, F-3, and F-4 have been determined and they were found to be 9.82, 9.71, 9.91, and 9.86, respectively. The values obtained by transferring pKa into pK′a are in good agreement with the values obtained ...spectrophotometrically.
TY - JOUR
AU - Karljiković, Katarina
AU - Stanković, B.S
AU - Milosavljević, E.B
AU - Binenfeld, Z.J.
PY - 1986
UR - https://farfar.pharmacy.bg.ac.rs/handle/123456789/24
AB - Mixed acidic constants (pK′a) of quinolinium oximes [1-(2-phenyl-2-hydroxyiminoethyl)-1-quinolinium chloride (F-1), 1-(2-phenyl-2-hydroxyiminoethyl)-1-isoquinolinium chloride (F-2), 1-(2-phenyl-2-hydroxyiminoethyl)-1-(4′-methyl)-quinolinium chloride (F-3), and 1-(2-phenyl-2-hydroxyiminoethyl)-1-(6′-methyl)-quinolinium chloride (F-4)] have been determined via their UV absorption spectra recorded in the series of Britton-Robinson's buffer solutions in the pH region 8.74-11.28 (t=25±0.5°C, μ=0.2). The obtained pK′a values are in good agreement with those achieved by applying graphical methods. The following pK′a values have been obtained: 9.93 for F-1, 9.90 for F-2, and 10.02 for F-3 and F-4. On the basis of potentiometric titrations thermodynamic acidic constants (pKa) of compounds F-1, F-2, F-3, and F-4 have been determined and they were found to be 9.82, 9.71, 9.91, and 9.86, respectively. The values obtained by transferring pKa into pK′a are in good agreement with the values obtained spectrophotometrically.
PB - Springer-Verlag
T2 - Monatshefte für Chemie Chemical Monthly
T1 - Determination of acidic constants of some phenyl-hydroxyiminoethyl quinolinium compounds
VL - 117
IS - 5
SP - 661
EP - 670
DO - 10.1007/BF00817903
ER -
@article{
author = "Karljiković, Katarina and Stanković, B.S and Milosavljević, E.B and Binenfeld, Z.J.",
year = "1986",
abstract = "Mixed acidic constants (pK′a) of quinolinium oximes [1-(2-phenyl-2-hydroxyiminoethyl)-1-quinolinium chloride (F-1), 1-(2-phenyl-2-hydroxyiminoethyl)-1-isoquinolinium chloride (F-2), 1-(2-phenyl-2-hydroxyiminoethyl)-1-(4′-methyl)-quinolinium chloride (F-3), and 1-(2-phenyl-2-hydroxyiminoethyl)-1-(6′-methyl)-quinolinium chloride (F-4)] have been determined via their UV absorption spectra recorded in the series of Britton-Robinson's buffer solutions in the pH region 8.74-11.28 (t=25±0.5°C, μ=0.2). The obtained pK′a values are in good agreement with those achieved by applying graphical methods. The following pK′a values have been obtained: 9.93 for F-1, 9.90 for F-2, and 10.02 for F-3 and F-4. On the basis of potentiometric titrations thermodynamic acidic constants (pKa) of compounds F-1, F-2, F-3, and F-4 have been determined and they were found to be 9.82, 9.71, 9.91, and 9.86, respectively. The values obtained by transferring pKa into pK′a are in good agreement with the values obtained spectrophotometrically.",
publisher = "Springer-Verlag",
journal = "Monatshefte für Chemie Chemical Monthly",
title = "Determination of acidic constants of some phenyl-hydroxyiminoethyl quinolinium compounds",
volume = "117",
number = "5",
pages = "661-670",
doi = "10.1007/BF00817903"
}
Karljiković, K., Stanković, B.S, Milosavljević, E.B,& Binenfeld, Z.J.. (1986). Determination of acidic constants of some phenyl-hydroxyiminoethyl quinolinium compounds. in Monatshefte für Chemie Chemical Monthly
Springer-Verlag., 117(5), 661-670.
https://doi.org/10.1007/BF00817903
Karljiković K, Stanković B, Milosavljević E, Binenfeld Z. Determination of acidic constants of some phenyl-hydroxyiminoethyl quinolinium compounds. in Monatshefte für Chemie Chemical Monthly. 1986;117(5):661-670.
doi:10.1007/BF00817903 .
Karljiković, Katarina, Stanković, B.S, Milosavljević, E.B, Binenfeld, Z.J., "Determination of acidic constants of some phenyl-hydroxyiminoethyl quinolinium compounds" in Monatshefte für Chemie Chemical Monthly, 117, no. 5 (1986):661-670,
https://doi.org/10.1007/BF00817903 . .
