Separation and Characterization of New Transition Metal Complexes of some Chromone Derivatives

Abstract

Some transition metal complexes of 5-[7-hydroxy-5-methoxy-2-methyl chromonelidene] barbituric acid (H₂L¹) and 5-[5,7-dihydroxy-2-methyl chromonelidene] thiobarbituric acid (H₃L²) have been separated and characterized by elemental analyses, IR and electronic spectra and thermogravimetric analyses. Square-planar structures are suggested for the Cu(II)
and Pd(II) complexes, whereas octahedral structures are proposed for the
Cr(III), Ni(II), Co(II), Pt(IV) and Rh(III) complexes.