Synthesis and characterization of 15-molybdodiphosphate

The formation of a 15-molybdodiphosphate anion was ascertained in a 0.05 M (M = mol dm −3) Mo(VI)−0.2 M HCl−4 mM P 2O 7 4− −40% (vol./vol.) CH 3CN system at ambient temperature, and the yellow complex was isolated as a tetrapropylammonium (n-Pr 4N +) salt. Once the parent 18-molybdodiphosphate anion...

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Bibliographic Details
Published in:Inorganica Chimica Acta 1995-08, Vol.236 (1), p.167-171
Main Authors: Himeno, Sadayuki, Kubo, Tomomi, Saito, Atsuyoshi, Hori, Toshitaka
Format: Article
Language:English
Subjects:
Molybdenum complexes
Oxoanion complexes
Polymolybdodiphosphate complexes
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Summary:The formation of a 15-molybdodiphosphate anion was ascertained in a 0.05 M (M = mol dm −3) Mo(VI)−0.2 M HCl−4 mM P 2O 7 4− −40% (vol./vol.) CH 3CN system at ambient temperature, and the yellow complex was isolated as a tetrapropylammonium (n-Pr 4N +) salt. Once the parent 18-molybdodiphosphate anion, [(P 2O 7)Mo 18O 54] 4−, was formed in the solution, it transformed spontaneously into the 15-molybdodiphosphate anion, [H 6(P 2O 7)Mo 15O 48] 4−. The transformation reaction was followed voltammetrically at the glassy carbon (GC) electrode. The rate of transformation, which depended on the concentrations of CH 3CN and HCl, on the Mo/P mole ratio, and also on the temperature of the solution, was discussed. The complex was characterized by the voltammetric and IR spectroscopic behaviors.
ISSN:0020-1693
1873-3255
DOI:10.1016/0020-1693(95)04615-G