SOLVATOCHROMIC MIXED-LIGAND COPPER(II) CHELATES WITH N-METHYLATED OR N,N'-METHYLATED ETHYLENEDIAMINES AND TROPOLONATO OR HINOKITIOLATO LIGANDS

Mixed copper(II) chelates of the type [Cu(trop/hino)(diamine)]ClO4 wer e prepared with a tropolonato or hinokitiolato ligand (trop/hino) and N,N-dimethyl, N,N'-dimethyl, N,N,N'-trimethyl or N,N,N',N'-tetramethyl ethylenediamine. These chelates were generally similar to the correspo nding beta-diketonato chelates, in particular with respect to their ch aracteristic solvatochromism, i.e. the shift of their d-d bands to the red with increasing DN (donor number) of the solvent. Copyright (C) 1 996 Elsevier Science Ltd