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Spectroscopic Studies of Polynuclear Complexes. II. Preparation and Optical Resolution of μ-Amido-μ-superoxo and μ-Amido-μ-peroxo Tetrakis(α-di-imine)dicobalt(III) Ions

1970; Oxford University Press; Volume: 43; Issue: 11 Linguagem: Inglês

10.1246/bcsj.43.3462

1348-0634

Yōichi Sasaki, Junnosuke Fujita, Kazuo Saito,

Lanthanide and Transition Metal Complexes

Abstract New binuclear cobalt(III) complexes of the type, [L2Co(μ-NH2,O2)CoL2](ClO4)n, where L is 1,10-phenanthroline or 2,2′-bipyridyl, and n=3 and 4, correspond to the so-called μ-peroxo and μ-superoxo form, respectively, were prepared and resolved into their optical isomers. Their absorption spectra have been compared with those of analogous ethylenediamine complexes and the structures have been discussed. The absolute configuration of these complexes has been determined by their circular dichroism spectra. The μ-peroxo complexes seem to be more stable than the corresponding μ-superoxo complexes in aqueous solution.