Chemistry Journal of Moldova

CATALYTIC WAVE OF CHLORATE IONS IN THE PREZENCE OF THE MOLYBDENUM (VI) - 2,3-DIHYDROXYBENZALDEHYDE COMPLEX

Author(s):

Ludmila Kiriyak, Tatiana Cazac, M. Revenco, and I. Povar


Field: Analytical chemistry
Type: Research paper
Issue: 2010 Volume 5, no.2
Pages: 24-29
Keywords:

Voltammetry, catalytic current, molybdenum, 2,3-dihydroxybenzaldehyde, potassium chlorate.


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Abstract (JPEG)

DOI:
dx.doi.org/10.19261/cjm.2010.05(2).02

Graphical Abstract:
The polarographic catalytic current in acid solutions of Mo(VI), 2,3-dihydroxybenzaldehyde (2,3-DHBA) and chlorate ions has been investigated. The scheme of reactions taking place in the solutions and on the electrode has been elaborated. The increase of the catalytic current is explained by the formation of the active intermediate complex [Mo(V)×2,3-DHBA (ClO3-)]. The rate constant of formation for the active intermediate complex K = 2.5 × 106 mol-1 × dm3 × s-1, the activation energy of reaction Ea=14.0 kcal×mol-1 and the activation entropy ∆Sa¹= -28.3 e.u. have also been determined.

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