Central role of phenanthroline mono-N-oxide in the decomposition reactions of tris(1,10-phenanthroline)iron(II) and -iron(III) complexes.
1,10-Phenanthroline mono-N-oxide (phenO) is a product of the decomposition of tris(1,10-phenanthroline)iron(III), Fe(phen)(3)(3+), and has a slight autocatalytic effect on the overall reaction. The mechanism is proposed to involve Fe(phen)(3)(4+) as a minor intermediate. The addition of phenO significantly influences the kinetic features of the decomposition of Fe(phen)(3)(3+) and the oxidation of Fe(phen)(3)(2+) by HSO(5)(-). The autocatalytic decomposition explains the difficulties in the preparation of Fe(phen)(3)(3+) and may contribute to exotic kinetic phenomena studied using Fe(phen)(3)(3+)/Fe(phen)(3)(3+) as a supposedly innocent indicator.
Bellér
Gábor
G
Department of Inorganic and Analytical Chemistry, University of Debrecen, P.O. Box 21, Debrecen 10, Hungary H-4010.
Lente
Gábor
G
Fábián
István
I
D005290:Ferric Compounds / Q000737:chemistry*; D005296:Ferrous Compounds / Q000737:chemistry*; D007700:Kinetics; D015394:Molecular Structure; D010087:Oxides / Q000737:chemistry*; D010618:Phenanthrolines / Q000737:chemistry*
D005290:Ferric Compounds; D005296:Ferrous Compounds; D010087:Oxides; D010618:Phenanthrolines; C550635:tris(1,10-phenanthroline)iron(II)