Summary
The kinetics and mechanism of the reduction of MnO4 − by CoW12O4O6− in aqueous HC1O4 were studied. The reaction follows the rate law:-d[MnO sup−inf4 ]/dt = 5K a k[H+][MnO sup−inf4 ][CoW12O4O6−] with K a = 2.99 × 10−3mol−1 dm3 and k = 2.00 ± 0.02 × 103dm6mol−2s−1 at 25°C. Close agreement between k obs and k calc on the basis of Marcus theory suggest an outersphere mechanism operates. Alkali metal ions catalyse the reaction in the order K+ > Na+ > Li+ and this result has been rationalized.
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References
G. A. Ayoko, J. F. Iyun and I. F. El-Idris, Transition Met. Chem., 18, 275 (1993).
D. J. Pietrzyk and C. W. Frank, Analytical Chemistry, 2nd Edit., Academic Press, New York, 1979, pp. 266–269.
R. H. Simoyi, P. De Kepper, I. R. Epstein and K. Kustin, Inorg. Chem., 25, 538 (1986).
G. Gordon and H. Taube, Inorg. Chem., 1, 29 (1962).
T. P. Logan and J. P. Birk, Inorg. Chem., 12, 2464 (1973).
F. W. Moore and K. W. Hicks, Inorg. Chem., 14, 413 (1975).
K. W. Hicks and G. A. Chappelle, Inorg. Chem., 19, 1623 (1980).
L. Thomas and K. W. Hicks, Inorg. Chem., 13, 749 (1974).
M. A. Rawoof and J. R. Sutter, J. Phys. Chem., 71, 2767 (1967).
K. W. Hicks and J. R. Sutter, J. Phys. Chem., 75, 1107 (1971).
S. Lawani and J. R. Sutter, J. Phys. Chem., 77, 1547 (1973); S. A. Lawani, J. Phys. Chem., =80, 105 (1976).
M. Y. Hussain and F. Ahmed, Transition Met. Chem., 15, 185 (1990).
N. Bailey, A. Carrington, K. A. K. Lott and M. C. R. Symons, J. Chem. Soc., 290 (1960).
P. G. Rasmussen and C. H. Brubaker, Inorg. Chem., 3, 977 (1964); L. C. W. Baker and V. E. Simmons, J. Am. Chem. Soc., 81, 4744 (1959).
G. A. Ayoko, Inorg. Chim. Acta, 170, 89 (1990) and references therein.
G. A. Ayoko, J. F. Iyun and I. F. El-Idris, Transition Met. Chem., 17, 423 (1992) and references therein.
J. Bassett, R. C. Denney, G. H. Jeffery and J. Mendham, Vogel's Textbook of Quantitative Inorganic Analysis Including Elementary Instrumental Analysis, 4th Edit., ELBS and Longman, London, 1982, p. 352.
R. M. Marcus, J. Phys. Chem., 67, 853 (1963); Electrochim. Acta, 13, 995 (1968).
A. G. Lappin and R. D. Peacock, Inorg. Chim. Acta, 46, L71 (1980).
C. O. Adedinsewo and A. Adegite, Inorg. Chem., 18, 3597 (1979) and references therein.
M. J. Akhtar and A. Haim, Inorg. Chem., 27, 1608 (1988) and references therein.
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Ayoko, G.A., Arabel, J. Electron transfer at tetrahedral cobalt(II). Part V: kinetics of permanganate ion reduction. Transition Met Chem 19, 212–214 (1994). https://doi.org/10.1007/BF00161892
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DOI: https://doi.org/10.1007/BF00161892