Potentiometric study of Tungsten(VI) Complex Formation with Tartarate

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F00%3A00002916" target="_blank" >RIV/00216224:14310/00:00002916 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Potentiometric study of Tungsten(VI) Complex Formation with Tartarate

Popis výsledku v původním jazyce

Complexation of tungstate with tartarate has been investigated by potentiometry in the pH range 2,5-7,5 in 1 M KNO3. The experimental data were evaluated with ESAB (for the calculation of protonation constants of tartarate) and OPIUM (for the formation constants of complexes) computer programs. A high number of chemical models including polynuclear complexes were considered and tested on a computer. The final model comprises five complexes that have a tungsten(VI):tartarate ratio 2:2 and 1:2. The following formation constants (Beta_pqr)were calculated: log Beta(212) = 16.6 +/- 0.1, log Beta(312) = 20.4 +/- 0.2, log Beta(412) = 23.9 +/- 0.1, log Beta(322) = 26.68 +/- 0.08, and log Beta(422) = 30.7 +/- 0.1, where p, q, r refer to stoichiometric coefficients in general formula (H)p(WO4)q(C4H4O6)r p-2q-2r. Structures of the complexes were proposed.

Název v anglickém jazyce

Potentiometric study of Tungsten(VI) Complex Formation with Tartarate

Popis výsledku anglicky

Complexation of tungstate with tartarate has been investigated by potentiometry in the pH range 2,5-7,5 in 1 M KNO3. The experimental data were evaluated with ESAB (for the calculation of protonation constants of tartarate) and OPIUM (for the formation constants of complexes) computer programs. A high number of chemical models including polynuclear complexes were considered and tested on a computer. The final model comprises five complexes that have a tungsten(VI):tartarate ratio 2:2 and 1:2. The following formation constants (Beta_pqr)were calculated: log Beta(212) = 16.6 +/- 0.1, log Beta(312) = 20.4 +/- 0.2, log Beta(412) = 23.9 +/- 0.1, log Beta(322) = 26.68 +/- 0.08, and log Beta(422) = 30.7 +/- 0.1, where p, q, r refer to stoichiometric coefficients in general formula (H)p(WO4)q(C4H4O6)r p-2q-2r. Structures of the complexes were proposed.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CB - Analytická chemie, separace

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2000

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chem. Papers

ISSN

0366-6352

e-ISSN

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Svazek periodika

54

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

7

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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