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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 11, Number 4
BKCSDE 11(4)
April 20, 1990 

The Effect of H+ on Reduction of [Co(NH3)4(C2O4)]+ with [Fe(H2O)6]2+
Joo-Sang Lim, Jae-Weon Lee, Seung-Gu Kang, Byung-Kak Park*
Kinetic studies were carried out for the redox reaction of [Co(NH3)4(C2O4)]+ with aqueous [Fe(H2O)6]2+ solution in the present of H+ by UV/VIS-spectrophotometric method. It was found that the order of H+ for the reaction is first one in the higher H+ concentration range of 1.67×10-1 M~1.00 M, while second order in the lower range of 6.30×10-2 M~1.67×10-1 M. Reaction order of the substrates was found to be first order with respect to each of them. Accordingly overall reactions are third or fourth order. The results of calculation for the Extended Huckel Molecular Orbital theory contribute to estimate the preferred intermediates, bridging form of binuclear complex. On the basis of these results, we propose that this redox reaction proceed via inner-sphere reaction mechanism.
303 - 306
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