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.