Published August 2000 | Version v1
Journal article Metadata-only

Stability of chelate complexes of lanthanides with derivatives of trifluoroacetylacetone in a water-ethanol solution

Creators

  • 1. Fiziko-Khimicheskij Inst. AN Ukrainy, Odessa (Ukraine)

Description

By the method of pH-potentiometric titration at 18 deg C and ionic strength μ = 0.1 the successive stability constants of lanthanide (Ln La-Nd, Sm-Lu) complexes with trifluoroacetylacetone derivatives: F3C-CO-CH2-CO-R (R = CH3, -C(CH3)3, -OC2H5) were determined. Using a previously suggested parametric equation, potential strength of the relevant β-diketonates of promethium was evaluated. It is shown that within the given class of ligands stepped complexing is characterized by the ratios of constants deviating from statistic distribution

Abstract (Russian)

Методом рН-потенциометрического титрирования при 18 град. С и ионной силе μ = 0,1 определены последовательные константы устойчивости комплексов лантанидов (Ln = La-Nd, Sm-Lu) с производными трифторацетилацетона: F3C-CO-CH2-CO-R (R = CH3, -C(CH3)3, -OC2H5). С использованием предложенного ранее параметрического уравнения оценена потенциальная прочность соответствующих β-дикетонатов прометия. Показано, что в пределах данного класса лигандов ступенчатое комплексообразование характеризуется соотношениями констант, отклоняющимися от статистического распределения

Additional details

Additional titles

Original title (Russian)
Устойчивост' хелатных комплексов лантанидов с производными трифторацетилацетона в водно-этанольном растворе

Publishing Information

Journal Title
Zhurnal Neorganicheskoj Khimii
Journal Volume
45
Journal Issue
8
Journal Page Range
p. 1437-1440
ISSN
0044-457X
CODEN
ZNOKAQ

INIS

Country of Publication
Russian Federation
Country of Input or Organization
Russian Federation
INIS RN
32030266
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
AQUEOUS SOLUTIONS; CARBOXYLIC ACID ESTERS; CHELATES; CHEMICAL COMPOSITION; ELECTRONIC STRUCTURE; ETHANOL; KETONES; ORGANIC FLUORINE COMPOUNDS; PH VALUE; POTENTIOMETRY; RARE EARTH COMPLEXES; STABILITY; TEMPERATURE RANGE 0273-0400 K
Descriptors DEC
ALCOHOLS; CHEMICAL ANALYSIS; COMPLEXES; DISPERSIONS; ESTERS; HOMOGENEOUS MIXTURES; HYDROXY COMPOUNDS; MIXTURES; ORGANIC COMPOUNDS; ORGANIC HALOGEN COMPOUNDS; QUANTITATIVE CHEMICAL ANALYSIS; SOLUTIONS; TEMPERATURE RANGE; TITRATION; VOLUMETRIC ANALYSIS

Optional Information

Notes
17 refs., 1 fig., 2 tabs.