Complexation of thorium and beryllium with xylenol orange

Journal Article · Wed Oct 01 00:00:00 EDT 1986 · Sov. J. Coordinat. Chem.; (United States)

OSTI ID:6420430

Tikhonov, V N; Smirnova, S N

The interaction of thorium and beryllium with Xylenol Orange, which was purified by gel filtration on Molselect G-10, has been studied. Thorium forms a complex with a component ratio M:R = 2:1, = (1.11 +/- 0.02).10/sup 5/, and K/sub st/ = (3.25 +/- 0.89)/sup ./ 10/sup 13/ at pH 2 and a complex with a 1:1 component ratio and = (6.9 +/- 0.1).10/sup 4/ at pH 4. Beryllium forms a complex with a component ratio M:R = 1:1, = (3.6 +/- 0.1)/sup ./ 10/sup 4/, and K/sub st/ = (1.65 + or - 0.06)/sup ./ 10/sup 13/. For both thorium complexes lambda/sub max/ = 565 NM, and for the beryllium complex lambda/sub max/ = 475 nm. The study of the reaction mechanism has shown that the thorium complex with M:R = 2:1 forms when thorium in the form of Th/sup 4 +/ and the reagent in the form of H/sub 5/R/sup -/ interact. In the case of beryllium, the complex forms between BeOH/sup +/ and H/sub 3/R/sup 3 -/. Acetates have little influence on the formation of the thorium complex and a strong influence on the formation of the beryllium complex. Beer's law holds up to thorium and beryllium concentrations equal to 5 x 10/sup -5/ M when the concentration of Xylenol Orange is equal to 6 x 10/sup -5/M. Fluorides, citrates, tartrates, and EDTA interfere with the formation of the complexes of thorium and beryllium with Xylenol Orange.

• Research Organization: I.N. Ul'yanov Chuvash State Univ.
• OSTI ID: 6420430
• Journal Information: Sov. J. Coordinat. Chem.; (United States), Vol. 11:12
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BERYLLIUM
COMPLEXOMETRY
BERYLLIUM COMPLEXES
SYNTHESIS
THORIUM
THORIUM COMPLEXES
XYLENOL ORANGE
ABSORPTION SPECTRA
ACETATES
COMPARATIVE EVALUATIONS
COORDINATION VALENCES
PH VALUE
SAMPLE PREPARATION
SPECTROPHOTOMETRY
STRUCTURAL CHEMICAL ANALYSIS
ACTINIDE COMPLEXES
ACTINIDES
ALKALINE EARTH METAL COMPLEXES
ALKALINE EARTH METALS
CARBOXYLIC ACID SALTS
COMPLEXES
DYES
ELEMENTS
INDICATORS
METALS
SPECTRA
VALENCE
400201* - Chemical & Physicochemical Properties