Studies of Absorption Spectra. IX. The Spectra of Cobalt(II) Complexes.

Abstract

The spectra of hexammine- and tris(ethylenediamine)cobalt(II) ions were measured by taking special precaution against the formation of the highly colored oxidation products. The mono- and diammine spectra were found by use of Bjerrum's equil. data. The spectra of several octahedral cobalt(II) complexes are compared, and the displacements of band max. discussed. The spectrum of the tetrachloro complex is shown to agree with the crystal field theory if a tetrahedral configuration is assumed.