Tetradentate Schiff base copper(II) complexes

Ten copper(II) complexes of tetradentate Schiff bases obtained by condensin g two moles of an o-hydroxyphenylcarbonyl compound with a diamine have been prepared and characterized by elemental analyses, melting points, IR and e lectronic spectra. The IR and electronic spectra of the free ligand and the complexes are compared and discussed. The deconvolution of the visible spe ctra of the complexes in CHCl3, approximately C-2v or C-1, yielded four pea ks at ca. 15000, 17000, 18000-19000, and 20000-22000 cm(-1), assigned to th e four d-d transitions.