Central role of phenanthroline mono-N-oxide in the decomposition reactions of tris(1,10-phenanthroline)iron(II) and -iron(III) complexes

Gábor Bellér; Gábor Lente; István Fábián

doi:10.1021/ic902554b

Central role of phenanthroline mono-N-oxide in the decomposition reactions of tris(1,10-phenanthroline)iron(II) and -iron(III) complexes

Inorg Chem. 2010 May 3;49(9):3968-70. doi: 10.1021/ic902554b.

Authors

Gábor Bellér¹, Gábor Lente, István Fábián

Affiliation

¹ Department of Inorganic and Analytical Chemistry, University of Debrecen, P.O. Box 21, Debrecen 10, Hungary H-4010.

PMID: 20415494
DOI: 10.1021/ic902554b

Abstract

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.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Ferric Compounds / chemistry*
Ferrous Compounds / chemistry*
Kinetics
Molecular Structure
Oxides / chemistry*
Phenanthrolines / chemistry*

Substances

Ferric Compounds
Ferrous Compounds
Oxides
Phenanthrolines
tris(1,10-phenanthroline)iron(II)