Preparation and characterization of polynuclear cobalt(III) complexes with bridging carboxylato-ligands

Binuclear, trinuclear, and tetranuclear cobalt(III)–ammine complexes containing a variety of organic carboxylato-ligands have been prepared from the parent complex tri-µ-hydroxo-bis[triamminecobalt(III)]3+ and characterized A hexanuclear complex with a 9+ charge is described. Elemental analysis, u.v.–visible and i.r. spectra are reported.