A Paramagnetic Copper(III) Complex Containing an Octahedral CuIIIS6 Coordination Polyhedron
作者:Carsten Krebs、Thorsten Glaser、Eckhard Bill、Thomas Weyhermüller、Wolfram Meyer-Klaucke、Karl Wieghardt
DOI:10.1002/(sici)1521-3773(19990201)38:3<359::aid-anie359>3.0.co;2-5
日期:1999.2.1
Only the second octahedral, paramagnetic copper(III) complex (S=1) has now been synthesized and characterized. Six thiolato bridging ligands in the heterotrinuclear species [LCoIII CuIII CoIII L](ClO4 )3 ⋅2 Me2 CO (L=1,4,7-tris(4-tert-butyl-2-sulfidobenzyl)-1,4,7-triazacyclononane) stabilize this rare electron configuration. A section of the structure of the reduced form (CuII , S=½) is shown. XAS, EXAFS, and EPR spectroscopy prove unambiguously that the one-electron oxidation to the copper(III) is metal- rather than ligand-centered.