Chemistry in nitric acid solutions

Abstract

High field multinuclear n.m.r. spectroscopy can be applied with advantage to the study of inorganic solutes in 100% nitric acid and mixtures with dinitrogen tetraoxide or pentaoxide. The behaviour of phosphorus halo- and oxo-compounds in high density acid, HDA (44 wt.% dinitrogen tetraoxide in pure nitric acid) reveals the hydrolytic character of this type of medium and in 100% nitric acid, indicates the latter to be more highly protonating than its Hammett acidity function would suggest. In the present lecture, attention is focussed on solutions of vanadium and aluminium compounds, especially in relation to 51 V and 27 Al n.m.r. studies, and the results emphasise that metal chemistry occurring in nitric acid solutions can be much richer than might be inferred solely from a knowledge of isolable solid products. © 1986, Walter de Gruyter. All rights reserved.