Al-27, N-15, C-13 and H-1 NMR spectra of the 2 : 1 aluminium(III) complexes of some azo dyes

摘要

The Al-27, N-15, C-13 and H-1 NMR spectra in DMSO and Al-27 and N-15 magic angle spinning NMR spectra of 2:1 aluminium(III) complexes derived from 5-chloro-2-hydroxyaniline azo coupling products with acetoacetanilide, 3-methyl-1-phenylpyrazol-5-one and 2-naphthol were measured and analysed. It was found that the aluminium atom is six-coordinated, being bound to two oxygens and the nitrogen originating from 2-hydroxy-5-chloroaniline of each ligand, in an analogous fashion to 2:1 cobalt(III) complexes described earlier. (C) 1998 John Wiley & Sons, Ltd. [References: 25]