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Spectrophotometric investigation of the complexing reaction between rutin and titanyloxalate anion in 50% ethanol

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2000
Authors
Kuntić, Vesna
Malešev, Dušan
Radović, Z
Vukojević, Vladana
Article (Published version)
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Abstract
In the present work, rutin (3,3',4',5,7-pentahydrohyflavone-3-rhamnoglucoside) was determinated via a complexing reaction with a titanyloxalate anion. K-2[TiO(C2O4)(2)] and rutin react in 50% ethanol forming a 1:2 complex in a pH range from 4.00 to 11.50, in which the TiO(C2O4)(2)(2-) ion is linked to rutin through the 4-carbonyl and 5-hydroxyl group. The thermodynamic stability constant log beta(2)(0) of the complex is determined to 10.80 at pH = 6.50. The change of the standard Gibbs free energy Delta G(0) amounts to -61 kJ . mol(-1), indicating that the process of complex formation is spontaneous. The optimal conditions for the spectrophotometric determination of microconcentrations of rutin are at pH = 6.40 and lambda = 430 nm, where the complex shows an absorption maximum with a molar absorption coefficient a(430) = (60+/-2) . 10(3) dm(3) . mol(-1) . cm(-1). The method is applied rutin determination from tablets.
Source:
Monatshefte für Chemie Chemical Monthly, 2000, 131, 7, 769-777
Publisher:
  • Springer-Verlag Wien, Vienna

DOI: 10.1007/s007060050024

ISSN: 0026-9247

WoS: 000088565300009

Scopus: 2-s2.0-0008626740
[ Google Scholar ]
17
19
URI
https://farfar.pharmacy.bg.ac.rs/handle/123456789/233
Collections
  • Radovi istraživača / Researchers’ publications
Institution/Community
Pharmacy
TY  - JOUR
AU  - Kuntić, Vesna
AU  - Malešev, Dušan
AU  - Radović, Z
AU  - Vukojević, Vladana
PY  - 2000
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/233
AB  - In the present work, rutin (3,3',4',5,7-pentahydrohyflavone-3-rhamnoglucoside) was determinated via a complexing reaction with a titanyloxalate anion. K-2[TiO(C2O4)(2)] and rutin react in 50% ethanol forming a 1:2 complex in a pH range from 4.00 to 11.50, in which the TiO(C2O4)(2)(2-) ion is linked to rutin through the 4-carbonyl and 5-hydroxyl group. The thermodynamic stability constant log beta(2)(0) of the complex is determined to 10.80 at pH = 6.50. The change of the standard Gibbs free energy Delta G(0) amounts to -61 kJ . mol(-1), indicating that the process of complex formation is spontaneous. The optimal conditions for the spectrophotometric determination of microconcentrations of rutin are at pH = 6.40 and lambda = 430 nm, where the complex shows an absorption maximum with a molar absorption coefficient a(430) = (60+/-2) . 10(3) dm(3) . mol(-1) . cm(-1). The method is applied rutin determination from tablets.
PB  - Springer-Verlag Wien, Vienna
T2  - Monatshefte für Chemie Chemical Monthly
T1  - Spectrophotometric investigation of the complexing reaction between rutin and titanyloxalate anion in 50% ethanol
VL  - 131
IS  - 7
SP  - 769
EP  - 777
DO  - 10.1007/s007060050024
ER  - 
@article{
author = "Kuntić, Vesna and Malešev, Dušan and Radović, Z and Vukojević, Vladana",
year = "2000",
abstract = "In the present work, rutin (3,3',4',5,7-pentahydrohyflavone-3-rhamnoglucoside) was determinated via a complexing reaction with a titanyloxalate anion. K-2[TiO(C2O4)(2)] and rutin react in 50% ethanol forming a 1:2 complex in a pH range from 4.00 to 11.50, in which the TiO(C2O4)(2)(2-) ion is linked to rutin through the 4-carbonyl and 5-hydroxyl group. The thermodynamic stability constant log beta(2)(0) of the complex is determined to 10.80 at pH = 6.50. The change of the standard Gibbs free energy Delta G(0) amounts to -61 kJ . mol(-1), indicating that the process of complex formation is spontaneous. The optimal conditions for the spectrophotometric determination of microconcentrations of rutin are at pH = 6.40 and lambda = 430 nm, where the complex shows an absorption maximum with a molar absorption coefficient a(430) = (60+/-2) . 10(3) dm(3) . mol(-1) . cm(-1). The method is applied rutin determination from tablets.",
publisher = "Springer-Verlag Wien, Vienna",
journal = "Monatshefte für Chemie Chemical Monthly",
title = "Spectrophotometric investigation of the complexing reaction between rutin and titanyloxalate anion in 50% ethanol",
volume = "131",
number = "7",
pages = "769-777",
doi = "10.1007/s007060050024"
}
Kuntić, V., Malešev, D., Radović, Z.,& Vukojević, V.. (2000). Spectrophotometric investigation of the complexing reaction between rutin and titanyloxalate anion in 50% ethanol. in Monatshefte für Chemie Chemical Monthly
Springer-Verlag Wien, Vienna., 131(7), 769-777.
https://doi.org/10.1007/s007060050024
Kuntić V, Malešev D, Radović Z, Vukojević V. Spectrophotometric investigation of the complexing reaction between rutin and titanyloxalate anion in 50% ethanol. in Monatshefte für Chemie Chemical Monthly. 2000;131(7):769-777.
doi:10.1007/s007060050024 .
Kuntić, Vesna, Malešev, Dušan, Radović, Z, Vukojević, Vladana, "Spectrophotometric investigation of the complexing reaction between rutin and titanyloxalate anion in 50% ethanol" in Monatshefte für Chemie Chemical Monthly, 131, no. 7 (2000):769-777,
https://doi.org/10.1007/s007060050024 . .

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