sherif Kolkaila, alaa e ali, Almaza a shokry and mamdouh s Masoud
J. Chem. Res. Adv., 02 (02):01-09
sherif Kolkaila : Chemistry Department, Faculty of Science, Damanhour University, Egypt.
alaa e ali : chemistry department, faculty of science , damanhour university
Almaza a shokry : chemistry department, faculty of science , damanhour university
mamdouh s Masoud : chemistry department, faculty of science , damanhour university
Mandelic acid metal complexes of (Cr(III), Fe(III), Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II)) were synthesized, and characterized by HNMR spectra, IR, electronic spectra, magnetic susceptibility and ESR spectra. IR spectra proved that mandelic acid behaves as a bidentate ligand through hydroxyl and carboxyl groups, forming a stable five membered rings. Molecular modeling calculations of mandelic acid confirmed that the preferred sites for complexation are through the oxygen atoms. The bond lengths, bond angles and dihedral angles for the ligand were evaluated. All the synthesized complexes are of octahedral geometries. The thermal decomposition of all the systems was explained by DTA, TGA and DSC techniques. The thermodynamic and kinetic parameters of dissociation steps Ea, ΔS*and ΔH* were obtained from DTA thermograms. Biological activity of mandelic acid and its metal complexes were examined. Correlation analysis between different parameters is checked.