Nitrogen-14 nuclear magnetic resonance study of some diamagnetic covalent metal nitrates

Abstract

¹⁴ N N.m.r. spectroscopy has been used to investigate the nature of species in non-aqueous solutions of some covalent diamagnetic metal nitrato-compounds. Certain covalent nitrates of non-metals have also been studied for purposes of comparison. Solutions of the metal nitrates in CCl₄ and MeNO₂ show chemical shifts which clearly indicate their covalent nature but fail to distinguish the bonding mode. Solutions in electron-pair donor solvent: exhibit generally lower shifts, attributed to partial dissociation of nitrate ligands as a result of solvent-donor and dielectric influences. The suitability of pure nitric acid as a solvent and reaction medium for covalent metal nitrato-cornpounds has also been examined by the ¹⁴N n.m.r. technique.