Redox-induced $μ$-acetato and $μ$-oxo core interconversions in dinuclear manganese tris(2-pyridylmethyl)amine (tpa) complexes: isolation and characterization of [Mn2III($μ$-O)($μ$-O2CCH3)(tpa)2]3+.
{The electrochem. properties of the bis($μ$-acetato) complex [MnII2(O2CCH3)2(tpa)2]2+ (12+) [tpa = tris(2-pyridylmethyl)amine] in an org. medium (CH3CN) were studied. Two successive controlled potential oxidns. of a soln. of 12+ at 0.7 and 1.1 V vs. Ag/Ag+ (10 mM) allow the selective and nearly quant. formation of the mono-($μ$-oxo) mono-($μ$-acetato) complex [MnIII2(O)(O2CCH3)(tpa)2]3+ (23+) and the bis($μ$-oxo) complex [MnIV2(O)2(tpa)2]4+ (34+), resp. Each substitution of an acetate group by an oxo group is caused by an overall two-electron oxidn. of the corresponding dimanganese complex. The assocd. electrochem. back transformations were also studied. Complex 23+, which possesses a rare mono-($μ$-oxo) mono-($μ$-acetato) motif, was isolated and characterized by x-ray crystallog. This complex crystallizes in the monoclinic system, space group P21/n with a 11.9899(17), b 35.050(5), c 12.3952(18) {\AA}, $\beta$ 101.218(6)°
Références
- Titre
- Redox-induced $μ$-acetato and $μ$-oxo core interconversions in dinuclear manganese tris(2-pyridylmethyl)amine (tpa) complexes: isolation and characterization of [Mn2III($μ$-O)($μ$-O2CCH3)(tpa)2]3+.
- Type de publication
- Article de revue
- Année de publication
- 2007
- Auteurs
- Collomb, Marie-Noelle, Mantel Claire, Romain Sophie, Duboc Carole, Leprêtre Jean-Claude, Pécaut Jacques, and Deronizer Alain
- Revue
- Eur. J. Inorg. Chem.
- Pagination
- 3179–3187
- ISSN
- 1434-1948
Soumis le 12 avril 2018