Studies on systems of salts and mixed solvents 35 — 27 Al NMR investigations of AlCl 3 ‐water‐ N , N ‐dimethylformamide solutions using the solid‐state MAS technique

Conventional liquid‐state 27 Al NMR spectra of concentrated solutions of the AlCl 3 ‐water‐ N , N ‐dimethyl‐ N ‐Dimethylformamide formamide system contain comparatively broad non‐structured lines. Application of MAS leads to a reduction in the line width and a structuring of the spectra. This allowed the experimental determination of the chemical shifts of [Al(H 2 O) 6− x (DMF) x ] 3+ ( x = 0−6) mixed‐ligand complexes. The investigations demonstrate an example of the applicability to liquids of the NMR MAS technique, which was originally developed for solids. They underline the existence, in a reduced form, of ‘solid‐type’ interactions within the investigated solutions.