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Redox kinetics of metal complexes in nonaqueous solutions. V. Kinetics and mechanism of the iron (II) reduction of the acetylacetonates of manganese (III) and cobalt (III) in acetonitrile

✍ Scribed by Roland Schmid; Valentin N. Sapunov

Publisher
John Wiley and Sons
Year
1979
Tongue
English
Weight
737 KB
Volume
11
Category
Article
ISSN
0538-8066

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✦ Synopsis

The electron transfer step of the reduction of Mn(acac)s and Co(acac)s by Fe(I1) in acetonitrile is preceded by the one-ended dissociation of an acac ligand and the formation of a binuclear bridged complex. After the electron transfer has taken place through the bridging ligand, the complex dissociates into the products M(acac)2 (M = Mn, Co) and Fe(acac)'+. These primary reaction products could not be identified, since the transfer of acac from M(acac)2 to Fe(acac)*+ is too rapid, producing ultimately Fe(acac):r and M2+. The M(II1)oxygen cleavage is accelerated by M(acac)z. Furthermore, the dissociation of the binuclear intermediate is catalyzed by the M(acac)s reactant. Mn(acacj:j is reduced more than a thousand times faster than Co(acac)3.

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