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X‐Ray Structures of Copper(II) and Nickel(II) Radical Salen Complexes: The Preference of Galactose Oxidase for Copper(II)

2010; Wiley; Volume: 49; Issue: 29 Linguagem: Inglês

10.1002/anie.201001040

1521-3773

Maylis Orio, Olivier Jarjayes, Hussein Kanso, Christian Philouze, Frank Neese, Fabrice Thomas,

Magnetism in coordination complexes

Copper or nickel? The depicted CuII salen complex, an active-site model of galactose oxidase (GO), is a localized radical in the solid state with a quinoid distribution of bond lengths in one ring. While the ligand-radical structure is not metal-dependent, the composition of the radical SOMO is. This feature may explain the much lower reactivity of the Ni complex and nature's preference for a CuII center in GO.