Interconversion reactions of binuclear complexes of cobalt

Abstract

The complexes (NH₃)₄ Co·µ(NH₂,OH)·Co(NH₃)₄⁴⁺ and (NH₃)₄ Co·µ(NH₂,O₂)·Co(NH₃)₄⁴⁺ are relatively easy to prepare and can be used as starting material for the preparation of a wide range of dicobalt complexes. Details of the reactions of the µ(NH₂, OH) complex with HCl, HBr, Hl, HNO₃, H₂SO₄, HClO₄, and HNO₂, and of the µ(NH₂, O₂) complex with l^–, NO₂^–, SO₃^2– and OH^– are considered. The diaquo-complex (NH₃)₄(H₂O)Co·NH₂·Co(H₂O)(NH₃)₄⁵⁺ can be prepared from the µ(NH₂, OH) complex and is a useful intermediate for the preparation of nitrito-, fluoro-, and acetato-complexes. Details of spectra are given.