Complexes of 8-Aminoquinoline. I. The Infrared Spectra of the Ligand,the Tris Complexes of Iron,Cobalt and Nickel Perchlorates and Their ND2 Analogues

Abstract

Deuteration of 8-aminoquinoline (aq) at the amino groups and comparison of the infrared spectrum of aq with those of aniline and quinoline enables reliable assignments to be proposed for the amino stretching and bending modes and the internal modes of the aminoquinoline rings. The spectra of the tris(8-aminoquinoline) complexes of iron, cobalt and nickel perchlorates have been examined over the range 4000–50 cm^?1 with assignments based on the ligand study and the effects of metal ion substitution and deuteration of the nickel complex. The existence of two vM-NH₂ and two vM-N(aq) bands is consistent with facial (cis-cis) octahedral coordination about the metal ion.