Claudia C. Wagner

Synthesis and Characterization of EDTA Complexes Useful for Trace Elements Supplementation

The synthesis of two heterobimetallic EDTA complexes, MgCu(EDTA).6H2O and ZnCu(EDTA).6H2O, is described. They were characterized by means of vibrational (infrared and Raman) and electronic (reflectance) spectroscopy. Several dissolution tests in 0.1 N HCl and simulated gastric juice were also performed. The results support the potential usefulness of these complexes for copper supplementation in human and veterinary medicine and to the simultaneous reinforcement of Mg(II) and Zn(II) levels.

Crystal Structure and IR Spectrum of Diaqua(o-phenanthroline) bis(saccharinato)lead(II)

The crystal structure of [Pb(sac)2ophen(H2O)2] (sac = saccharinate anion; ophen = 1,10-phenanthroline) has been solved by single X-ray diffractometry. It crystallizes in the monoclinic space group C2/c with Z = 4. The PbII atom presents the coordination number eight with unusual coordination of the ligand atoms between square-antiprism and dodecahedron. The saccharinate anion acts as a bidentate ligand. The i. r. spectrum of the complex has been analyzed in detail and assigned on the basis of the structural peculiarities. Kristallstruktur und IR-Spektrum von Diaqua(o-Phenanthrolin)-bis(saccharinato)blei(II) Die Kristallstruktur von [Pb(sac)2ophen(H2O)2] (sac = Anion des Saccharins; ophen = 1,10-Phenanthrolin) wurde rontgenographisch an Einkristallen bestimmt. Es kristallisiert in der monoklinen Raumgruppe C2/c mit Z = 4. PbII hat die Koordinationszahl acht, mit einer ungewohnlichen Ligand-Anordnung zwischen viereckigen-Antiprisma und Dodekaeder. Das Saccharinat-Anion fungiert als zweizahniger Ligand. Das IR-Spektrum wird eingehend analysiert und auf Grund der Strukturdaten zugeordnet.

Vibrational spectra of two Fe(III)/EDTA complexes useful for iron supplementation

The infrared and Raman spectra of Na[FeEDTA(H(2)O)]x2H(2)O and Na(4)[(FeEDTA)(2)O]x3H(2)O (EDTA=tetra anion of ethylenediaminetetraacetic acid), two complexes proposed as adequate for iron supplementation, were recorded and analyzed in relation to its structural peculiarities. Some comparisons between the recorded spectra are also presented, and the characteristics of the carboxylate motions as well as those of the metal-to-ligand vibrations are discussed in detail.

Vibrational spectra of Zn(II) complexes of the amino acids with hydrophobic residues.

The infrared and Raman spectra of the bis-chelated Zn(II) complexes of the amino acids glycine, alanine, valine, leucine, isoleucine and phenylalanine were recorded and analyzed in relation to its structural peculiarities. Some comparisons between the recorded spectra are also presented and the characteristics of the carboxylate motions as well as those of the metal-to-ligand vibrations are discussed in detail.

Characterization of bis(isoorotato)diaquamagnesium(II) dihydrate: a potentially useful complex for magnesium supplementation.

The synthesis and crystal structure of a new Mg(II) complex of stoichiometry [Mg(isoor)2(H2O)2].2H2O, where isoor is the monoanion of 5-carboxyuracil (isoorotic acid), are reported. The structure, solved by single-crystal X-ray diffractometry, shows that it crystallizes in the triclinic space group P(-1) with Z = 1. The electronic, IR and Raman spectra of the complex are briefly discussed. Its thermal behavior was also investigated by means of thermal gravimetry (TG) and differential thermal analysis (DTA) measurements in an oxygen atmosphere. Dissolution studies support the usefulness of the compound for magnesium supplementation.

Vibrational spectra of the Ga(III) complexes with oxine and clioquinol.

The FTIR and FT-Raman spectra of the gallium(III) complexes of 8-hydroxyquinoline (oxine) and 5-chloro-7-iodo-8-hydroxyquinoline (clioquinol), were recorded and briefly discussed by comparison with the spectra of the uncoordinated ligands and with some related species.

Vibrational spectra of Pb4(PO4)2SO4

The infrared and Raman spectra of Pb4(PO4)2SO4 were recorded and interpreted with the aid of a site symmetry analysis. Some comparisons with related species are made. Copyright

A new potentially useful complex for lithium therapies: dimeric monoaqua lithium isoorotate

Abstract The synthesis and X-ray crystal and molecular structures of a new Li(I) complex of stoichiometry [Li(isoor)H 2 O] 2 , where isoor is the monoanion of 5-carboxyuracil (isoorotic acid), are reported. It crystallizes in the monoclinic P 2 1 / n space group with Z =2, and a five-fold bipyramidal coordination around the Li(I) was observed for the first time. The electronic, infrared and Raman spectra of the complex are briefly discussed. Its thermal behavior was investigated by means of thermal gravimetry (TG) and differential thermal analysis (DTA). Dissolution studies were also performed in order to test the pharmacological characteristics of the complex.

Comparative Structural and Spectroscopic Characterization of MI LnIIITiO4 Ion-exchanged Phases, with MI : Na, H, K

Fil: Lavat, Araceli Elisabet. Universidad Nacional del Centro de la Pcia.de Bs.as.. Centro de Investigaciones En Fisica E Ingenieria del Centro de la Provincia de Buenos Aires. Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - Tandil. Centro de Investigaciones En Fisica E Ingenieria del Centro de la Provincia de Buenos Aires. Provincia de Buenos Aires. Gobernacion. Comision de Invest.cientificas. Centro de Investigaciones En Fisica E Ingenieria del Centro de la Provincia D; Argentina

Vibrational Spectrum of a Platinum Complex of Piroxicam

Abstract The infrared and Raman spectra of a platinum complex of the antiinflammatory drug piroxicam (Pir) and dimethylsulfoxide (DMSO) of composition [PtCl2Pir(DMSO)] were recorded and briefly discussed on the basis of its structural characteristics. The metal-to-ligand vibrations are analyzed in detail.