title: Spectral characterization of novel ternary zinc(II) complexes containing 1,10-phenanthroline and Schiff bases derived from amino acids and salicylaldehyde-5-sulfonates.
abstract: A series of new ternary zinc(II) complexes [Zn(L(1-10))(phen)], where phen is 1,10-phenanthroline and H(2)L(1-10)=tridentate Schiff base ligands derived from the condensation of amino acids (glycine, l-phenylalanine, l-valine, l-alanine, and l-leucine) and salicylaldehyde-5-sulfonates (sodium salicylaldehyde-5-sulfonate and sodium 3-methoxy-salicylaldehyde-5-sulfonate), have been synthesized. The complexes were characterized by elemental analysis, IR, UV-vis, (1)H NMR, and (13)C NMR spectra. The IR spectra of the complexes showed large differences between nu(as)(COO) and nu(s)(COO), Deltanu (nu(as)(COO)-nu(s)(COO)) of 191-225 cm(-1), indicating a monodentate coordination of the carboxylate group. Spectral data showed that in these ternary complexes the zinc atom is coordinated with the Schiff base ligand acts as a tridentate ONO moiety, coordinating to the metal through its phenolic oxygen, imine nitrogen, and carboxyl oxygen, and also with the neutral planar chelating ligand, 1,10-phenanthroline, coordinating through nitrogens.
authors.affiliation: Department of Chemistry, Sharif University of Technology, P.O. Box 11365-9516, Tehran, Iran. dboghaei@sharif.edu
authors.forename: Davar M
authors.initials: DM
authors.lastname: Boghaei
authors.forename: Mehrnaz
authors.initials: M
authors.lastname: Gharagozlou
mesh_terms: D000447:Aldehydes / Q000737:chemistry*; D000476:Alkanesulfonates / Q000737:chemistry*; D000596:Amino Acids / Q000737:chemistry*; D002244:Carbon / Q000737:chemistry; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D004577:Electron Probe Microanalysis; D006859:Hydrogen / Q000737:chemistry; D008024:Ligands; D015394:Molecular Structure; D009584:Nitrogen / Q000737:chemistry; D010618:Phenanthrolines / Q000737:chemistry*; D012545:Schiff Bases / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013696:Temperature; D015032:Zinc / Q000737:chemistry; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D000447:Aldehydes; D000476:Alkanesulfonates; D000596:Amino Acids; D008024:Ligands; D010618:Phenanthrolines; D012545:Schiff Bases; D012997:Solvents; D017967:Zinc Compounds; C013243:salicylaldehyde; D002244:Carbon; D006859:Hydrogen; D015032:Zinc; D009584:Nitrogen; D004121:Dimethyl Sulfoxide