Abstract
Polymer complexes derived from cinnamaldehyde and 2-substituted aniline with Cu(II), Pd(II), Pt(II), UO2(II), Rh(III), Ru(III), and Pd(IV) have been synthesized and characterized by IR, electronic, EPR, H-1-NMR, and C-13-NMR spectra, as well as by elemental analysis, thermogravimetry, and magnetic susceptibility measurements. The important bands in the IR spectra and the main H-1- and C-13-NMR signals are assigned and discussed in relation to molecular structure. The wavelengths of the principal electronic absorption peaks have been accounted for quantitatively in terms of crystal field theory and various parameters were evaluated. The complexes, [Ru(HLn)Cl-3](n), are penta-coordinate; and, a trigonal-bipyramidal environment is commensurate for the Ru( III) ion. The presence of a coordinated water molecule in complex the Cu( II) complex (20) was demonstrated by thermogravimetry. The compounds, [N-(3-phenylacrylidene)- 2-mercaptoaniline] (HL1) and cinnamaldehyde-2-aminophenol (HL2), act as monobasic and neutral bidentate ligands. The B-value suggests a strong covalency in the metal-ligand sigma-bond. Tentative structures of the polymer complexes are proposed.