Investigation and application of multiple reactions between molybdoniobium heteropoly acid and di- or trimethylthionines

Journal Article · Sat Mar 01 00:00:00 EST 1986 · J. Anal. Chem. USSR (Engl. Transl.); (United States)

OSTI ID:5035827

Mirzoyam, F B; Karapetyan, A A

This paper presents the results of the study and use of reactions of molybdoniobic acid (MNA) with di- and trimethylthiones (DMT and TMT, respectively). It was found that light absorption of acetone solutions of the products of outer-sphere interaction between MNA and DMT or TMT enabled the determination of optimum acidity for MNA formation. Reaction between TMT and MNA gives two different compounds containing two and five associated dye cations, different in molar extinction coefficient and optimum reaction acidity (pH 0.05-0.25 and 0.35-0.90). Formation of the 6th and 8th molybdenum series with an identical composition of the outer sphere is shown. A highly sensitive photometric method for determining niobium has been developed.

• Research Organization: Institute of General and Inorganic Chemistry, Armenian SSR Acad. of Sci.
• OSTI ID: 5035827
• Journal Information: J. Anal. Chem. USSR (Engl. Transl.); (United States), Vol. 40:9, PT. 2
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
HETEROPOLY ACIDS
CHEMICAL REACTION KINETICS
MOLYBDENUM COMPLEXES
NIOBIUM COMPLEXES
THIONINE
ABSORPTION SPECTRA
ACETONE
CHEMICAL COMPOSITION
ORGANIC SOLVENTS
PH VALUE
SOLVENT EXTRACTION
SPECTROPHOTOMETRY
AMINES
COMPLEXES
EXTRACTION
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
KETONES
KINETICS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
REACTION KINETICS
SEPARATION PROCESSES
SOLVENTS
SPECTRA
TRANSITION ELEMENT COMPLEXES
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)