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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Synthesis and characterization of Rhenium (III & V) Schiff base complexes for nuclear medicine /

Benny, Paul January 2001 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 2001. / Typescript. Vita. Includes bibliographical references. Also available on the Internet.
12

Synthesis and characterization of Rhenium (III & V) Schiff base complexes for nuclear medicine

Benny, Paul January 2001 (has links)
Thesis (Ph. D.)--University of Missouri-Columbia, 2001. / Typescript. Vita. Includes bibliographical references. Also available on the Internet.
13

Synthesis, characterization, and evaluation of silica and polymer supported catalysts for the production of fine chemicals

Shiels, Rebecca Anne. January 2008 (has links)
Thesis (Ph. D.)--Chemical Engineering, Georgia Institute of Technology, 2008. / Committee Chair: Dr. Christopher Jones; Committee Member: Dr. Dennis Hess; Committee Member: Dr. Hang Lu; Committee Member: Dr. Marcus Weck; Committee Member: Dr. Pradeep Agrawal. Part of the SMARTech Electronic Thesis and Dissertation Collection.
14

Catalise cationica na hidrolise de bases de Schiff

Machado, Vanderlei Gageiro January 1992 (has links)
Dissertação (mestrado) - Universidade Federal de Santa Catarina. Centro de Ciencias Fisicas e Matematicas / Made available in DSpace on 2012-10-16T22:10:59Z (GMT). No. of bitstreams: 0Bitstream added on 2016-01-08T17:55:49Z : No. of bitstreams: 1 90932.pdf: 1736571 bytes, checksum: 9b5e57becaa70fc482282dcd39d1c725 (MD5) / A reação de hidrólise das bases de Schiff N-benzildenoanilina, 4-metóxi-N-benzilidenoanilina, 2-metóxi-N-benzilidenoanilina e 2-(2-etoxi)etóxi-N-benzilidenoanilina foi estudada a 25oC, na presença de sais de metais alcalinos e alcalino-terrosos em diversas concentrações. A força iônica foi mantida constante no meio etanólico aquoso (88%) através da adição de tetrafluoroborato de tetrabutilamônio. Os resultados foram explicados em termos de três fatores: a) o efeito inibitório da complexação do íon metálico com o átomo ligado ao anel; b) o efeito provocado pela associação do cátion com o átomo de nitrogênio imínico; c) o efeito templato, envolvendo a associação do íon metálico com os átomos de oxigênio da cadeia lateral.
15

Síntese e caracterização de complexos tricarbonilrênio(I) com bases de Schiff derivadas de aminoácidos e escorpionatos derivados de tiobases

Soares, Sérgio Macêdo January 2013 (has links)
Tese (doutorado)—Universidade de Brasília, Instituto de Química, Programa de Pós-Graduação em Química, 2013. / Submitted by Alaíde Gonçalves dos Santos (alaide@unb.br) on 2014-04-30T14:19:37Z No. of bitstreams: 1 2013_SergioMacedoSoares.pdf: 3457137 bytes, checksum: 4982241e41052e0306857169b637074f (MD5) / Approved for entry into archive by Guimaraes Jacqueline(jacqueline.guimaraes@bce.unb.br) on 2014-06-05T14:34:11Z (GMT) No. of bitstreams: 1 2013_SergioMacedoSoares.pdf: 3457137 bytes, checksum: 4982241e41052e0306857169b637074f (MD5) / Made available in DSpace on 2014-06-05T14:34:12Z (GMT). No. of bitstreams: 1 2013_SergioMacedoSoares.pdf: 3457137 bytes, checksum: 4982241e41052e0306857169b637074f (MD5) / Neste trabalho está retratado a síntese e a caracterização de complexos de rênio(I) com ligantes escorpionatos derivados de tiobases e bases de Schiff derivadas da condensação de beta-aminoácidos (β-alanina, ácido 2-minobutírico e β-fenilalanina) com três aldeídos (2-hidróxi-1-salicilaldeído, 2-hidróxi-1-naftaldeído e 2-hidróxi-1-piperonal). Foram sintetizadas sete bases de Schiff (três inéditas) e dois ligantes escorpionatos (inéditos), dos quais quatro foram mais eficazes na complexação do fragmento fac-{Re(CO)3}+. Os complexos foram obtidos na proporção 1:1 (metal: ligante) e as estruturas cristalinas e moleculares dos complexos [fac-{Re(bala2hnH)(CO)3}2], (H3O)[Re(fac-bphala2hn)(CO)3]?CHCl3 ?H2O, K[fac-Re(bphala2hn)(CO)3]?⅓CHCl3?2H2O e fac-[Re{κ3-HB(btz)3)}(CO)3] foram determinadas por difração de raios X em monocristal que revelou que o íon ReI está hexacoordenado conferindo aos complexos geometria octaédrica distorcida. Os complexos obtidos foram caracterizados ainda por análise do ponto de fusão (P.F.), análise elementar (C, H, N), termogravimetria, espectroscopia de absorção no infravermelho e espectroscopia de ressonância magnética nuclear de 1H, 13C e 11B. Devido a baixa solubilidade e da reatividade dos ligantes escorpionatos, as análises de espectroscopia de ressonância magnética nuclear de 11B foram fundamentais na determinação da formação dos ligantes escorpionatos bem como dos complexos de rênio(I) com esses ligantes. _______________________________________________________________________________________ ABSTRACT / This work describes the synthesis of complexes of rhenium (I) with derivatives of escorpionate tiobases ligands. It also shows the synthesis and characterization of Schiff bases derived from the condensation of beta-amino acids (β-alanine, 2-β-phenylalanine and minobutírico acid) with three aldehydes (2-hydroxy-1-salicylaldehyde, 2-hydroxy-1-naphthaldehyde and 2 -hydroxy-1-piperonal). Seven Schiff bases (three new) and two “escorpionatos” binders (unpublished) were synthesized, four of which were more effective in complexing the fragment fac-{Re(CO)3}+. The complexes were obtained in the ratio 1:1 (metal: ligand). The crystal and molecular structures of the complexes [fac-{Re(bala2hnH)(CO)3}2], (H3O)[Re(fac-bphala2hn)(CO)3]?CHCl3?H2O, K[fac-Re(bphala2hn)(CO)3]?⅓CHCl3? 2H2O e fac-[Re{κ3-HB(btz)3)}(CO)3] were determined by X-ray diffraction crystallography. Analyses revealed that the ion ReI is hexacoordenate resulting in distorted octahedral complexes. The complexes were further characterized by analysis of melting point (mp); elemental analysis (C, H, N); thermogravimetry; infrared absorption spectroscopy and proton nuclear magnetic resonance of 1H, 13C and 11B. As “escorpianatos” ligands had low solubility and reactivity, analysis of nuclear magnetic resonance spectroscopy of 11B was essential in determining the escorpionates ligands and complexes of rhenium (I) with these binders.
16

Pharmacological properties of Schiff bases of N-hexylamine and amphetamine /

Sorer, Heinz January 1963 (has links)
No description available.
17

Formation and reactions of salicylaldehyde-Schiff bases and zinc complexes: equilibrium and kinetic study of vitamin B₆ model systems /

McQuate, Robert Samuel January 1973 (has links)
No description available.
18

Formation and transamination of pyridoxal-5'-phosphate Schiff bases and their copper(II) complexes : studies of a vitamin B₆ model system /

Hershey, Stephen Alan January 1976 (has links)
No description available.
19

Part I. Rates of transimination of vitamin B₆?Schiff bases.; Part II. Equilibria and rates of transfer of iron between various ligands and transferrin /

Weng, Shu-Huan January 1979 (has links)
No description available.
20

Asymmetric reactions catalyzed by transition metal complexes containing binaphthyl schiff bases and chiral porphyrinato ligands

周向葛, Zhou, Xiangge. January 1999 (has links)
published_or_final_version / Chemistry / Doctoral / Doctor of Philosophy

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