Synthesis of new allylidene amino phenol-containing Schiff bases and metal complex formation using trimethinium salts

An efficient route for the synthesis of novel Schiff bases from the condensation reaction of 2-substituted 1,3-bis(dimethylamino)-trimethinium salts with diverse aminophenols in the presence of triethylamine in EtOH at reflux is described. Complexes of transition metals with Schiff base ligand (L) 3c, having the donor atom set N2O2, were studied. The ultraviolet spectral behavior of the complexes in DMSO was investigated and the lambda(max) of these compounds was examined. The structure of the new compounds was confirmed based on their spectral data from IR, H-1 NMR and C-13 NMR, mass spectra, and elemental analysis.