Anhydrous cobalt(III) nitrate: preparation, spectra, and reactions with some organic ligands

Abstract

Cobalt(III) nitrate has been prepared by the reaction of dinitrogen pentoxide with cobalt(III) fluoride. All three nitrate groups are bonded in the same bidentate manner in the molecular unit, and the reactivity towards organic compounds is discussed in the light of this structure. Vibrational and electronic spectra and magnetic susceptibility measurements show that the six-co-ordinate molecular unit persists in carbon tetrachloride solution. Ligand-field parameters for Co(NO₃)₃ are calculated, and reactions leading to synthesis of complexes with some organic donor ligands are described.