Published December 2000 | Version v1
Journal article Metadata-only

Composition, stability, and reactivity of cerium(4) hydroxotartrato complexes in sulfate solutions

Creators

  • 1. Ob''edinennyj Inst. Yadernykh Issledovanij, Dubna (Joint Institute for Nuclear Research (JINR))
  • 2. Tomskij Gosudarstvennyj Univ., Tomsk (Russian Federation)

Description

Complex formation and oxidation-redaction decomposition of cerium tartrate hydroxo complexes formed in the Ce4+-SO42--H4Tart system are studied by spectrometry, pH-potentiometry techniques as well as kinetic method at ionic force I=2 in the pH 0.62-3.18 range of sulfate media and 22-28 Deg C. Two types of the complexes: [CeOHTart]1- and [(CeOH)2Tart]2+ are assigned. Their constants of stability and rate of chelate redox-decomposition are determined in the sulfate medium. The evidences for intermediate mechanism of oxidation-reduction process in the system with formation of two intermediate complexes of indicated 1:1 and 2:1 composition having similar reactivity are given

Abstract (Russian)

Методами спектрометрии, рН-потенциометрии, а также кинетически при ионной силе I=2 в интервале рН 0.62-3.18 сульфатной среды и 22-28 град С исследовано комплексообразование и окислительно-восстановительный распад церетартратных гидросокомплексов, образующихся в системе Ce4+-SO42--H4Tart. Установлено образование двух типов комплексов: [CeOHTart]1- и [(CeOH)2Tart]2+. На сульфатном фоне определены их константы устойчивости и константы скорости внутрикомплексного редокс-распада. Приведены доказательства интермедиатного механизма окислительно-восстановительного процесса в системе с образованием двух промежуточных комплексов указанного состава 1:1 и 2:1, обладающих одинаковой реакционной способностью

Additional details

Additional titles

Original title (Russian)

Состав, устойчивость и реакционная способность тартратных гидроксокомплексов церия(4) в сульфатной среде

Publishing Information

Journal Title
Zhurnal Neorganicheskoj Khimii
Journal Volume
45
Journal Issue
12
Journal Page Range
p. 2090-2098
ISSN
0044-457X
CODEN
ZNOKAQ

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
33005314
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
CERIUM COMPLEXES; CERIUM SULFATES; CHEMICAL COMPOSITION; CHEMICAL REACTION KINETICS; HYDROXIDES; PH VALUE; POTENTIOMETRY; REACTION INTERMEDIATES; REDOX REACTIONS; SOLUTIONS; SPECTROSCOPY; TARTRATES; TEMPERATURE RANGE 0273-0400 K
Descriptors DEC
CARBOXYLIC ACID SALTS; CERIUM COMPOUNDS; CHEMICAL ANALYSIS; CHEMICAL REACTIONS; COMPLEXES; DISPERSIONS; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; KINETICS; MIXTURES; OXYGEN COMPOUNDS; QUANTITATIVE CHEMICAL ANALYSIS; RARE EARTH COMPLEXES; RARE EARTH COMPOUNDS; REACTION KINETICS; SULFATES; SULFUR COMPOUNDS; TEMPERATURE RANGE; TITRATION; VOLUMETRIC ANALYSIS

Optional Information

Notes
16 refs., 6 figs., 2 tabs.