Untersuchungen über Bildung von Komplexen von Arylaminoanthrachinonen mit zweiwertigen Ionen von Übergangsmetallen, 1. Mitt.: Komplexe von Alizarin-cyaningrün und Alizarin-reinblau B mit Fe(II), Mn(II), Co(II), Ni(II) und Cu(II)

The complexes of 1,4-di(4-methylanilino)-anthraquinone (alizarin cyanin green) and 1-amino-2-bromo-4(2-sulpho-4-methylanilino)anthraquinone (alizarin pure blue B) with Fe(II), Mn(II), Co(II), Ni(II) and Cu(II) have been investigated and characterized on the basis of elemental analysis, conductometric, electronic and infrared spectral studies. The values of logB ^* for the different complexes are determined. I. R. spectra of the ligands in the solid chelates indicate that the bonding sites in the chelates are the -imino-nitrogen and the oxygen of its neighbouring C=O group. The chelate formation leads to proton displacement.