Published October 2000 | Version v1
Journal article Metadata-only

State of tungsten (6) ions in aqua-dimethyl formamide medium

Creators

  • 1. Donetskij Gosudarstvennyj Univ., Donetsk (Ukraine)

Description

Interaction in WO42- - HCl - dimethyl formamides (DMFA) - H2O systems (c(WO42-)=10-2 mol/l) with DMFA/water ratio ψ=0-0.55 is investigated by ph-potentiometry. It is established that presence of DMFA in the system stabilises decatungstate anion formation. Mathematical models describing the processes of polycondensation in the systems adequately are selected. Concentration and thermodynamic constants of isopolyanion formation in aqua-DMFA medium are proposed. 2,4,6-trimethylpyridinium decatungstate and barium decatungstate are synthesized. Decatungstate anion in the composition of salts are identified by the method of IR spectroscopy

Abstract (Russian)

Методом pH-потенциометрического титрования исследовано взаимодействие в системах WO42- - HCl - диметилформамид (ДМФ) - H2O (c(WO42-)=10-2 моль/л) с соотношением ДМФ/вода ψ=0-0.55. Установлено, что присутствие в системе ДМФ стабилизирует образование декавольфрамат-аниона. Выбраны математические модели, адекватно описывающие процессы поликонденсации в системах. Предложены концентрационные и термодинамические константы образованиея изополианионов в водно-ДМФ среде. Синтезированы декавольфрамат 2,4,6-триметилпиридиния и декавольфрамат бария. Методом ИК-спектроскопии в составе солей идентифицирован декавольфрамат-анион

Additional details

Additional titles

Original title (Russian)
Состояние ионов вольфрама (6) в водно-диметилформамидной среде

Publishing Information

Journal Title
Zhurnal Neorganicheskoj Khimii
Journal Volume
45
Journal Issue
10
Journal Page Range
p. 1761-1767
ISSN
0044-457X
CODEN
ZNOKAQ

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
32044868
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
AMIDES; AQUEOUS SOLUTIONS; CHEMICAL PREPARATION; CHEMICAL REACTION KINETICS; CHEMICAL STATE; CONCENTRATION RATIO; MATHEMATICAL MODELS; POTENTIOMETRY; THERMODYNAMIC PROPERTIES; TUNGSTEN COMPLEXES; TUNGSTEN COMPOUNDS
Descriptors DEC
CHEMICAL ANALYSIS; COMPLEXES; DISPERSIONS; HOMOGENEOUS MIXTURES; KINETICS; MIXTURES; ORGANIC COMPOUNDS; ORGANIC NITROGEN COMPOUNDS; PHYSICAL PROPERTIES; QUANTITATIVE CHEMICAL ANALYSIS; REACTION KINETICS; REFRACTORY METAL COMPOUNDS; SOLUTIONS; SYNTHESIS; TITRATION; TRANSITION ELEMENT COMPLEXES; TRANSITION ELEMENT COMPOUNDS; VOLUMETRIC ANALYSIS

Optional Information

Notes
10 refs., 4 figs., 3 tabs.