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Previous issue date: 2016-01-27 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Foram sintetizados neste trabalho em solu??o aquosa os seguintes compostos de coordena??o: [Ni(LDP)(H2O)2Cl2].2H2O, [Co(LDP)Cl2].3H2O, [Ni(CDP)Cl2].4H2O, [Co(CDP)Cl2].4H2O, [Ni(BDZ)2Cl2].4H2O e [Co(BDZ)2Cl2].(H2O). Esses complexos foram sintetizados por adi??o estequiom?trica do ligante nas respectivas solu??es de cloretos do metal. A precipita??o ocorreu ap?s a secagem dos solventes sob temperatura ambiente. A caracteriza??o e proposta das estruturas foram realizadas utilizando-se de m?todos convencionais de an?lise tais como: an?lise elementar (CHN), espectroscopia de absor??o na regi?o do infravermelho com transformada de Fourier (FTIR), difratometria de raios X pelo m?todo do p? e as t?cnicas termoanal?ticas TG/DTG (termogravimetria/termogravimetria derivada) e DSC (calorimetria explorat?ria diferencial). Estas t?cnicas forneceram informa??es sobre desidrata??o, modos de coordena??o, comportamento t?rmico, composi??o e estrutura dos compostos sintetizados. Com os resultados das curvas TG, p?de-se estabelecer a f?rmula geral de cada composto sintetizado. Pela an?lise dos difratogramas de raios X foi observado que quatro dos complexos sintetizados apresentam estrutura n?o cristalina que foram os complexos obtidos a partir da L-dopa e Carbidopa e para os complexos obtidos a partir do benzimidazol obteve-se estruturas cristalinas. As observa??es dos espectros na regi?o do infravermelho sugeriram uma coordena??o monodentada do ligante aos respectivos centros met?licos atrav?s do grupo amina para todos os complexos. As curvas TG-DTG e DSC forneceram informa??es e importantes sobre o comportamento e a decomposi??o t?rmica dos compostos sintetizados. Os dados de condutividade molar apontaram que as solu??es dos complexos formados se comportam como um n?o-eletr?lito, o que implica dizer que o cloro est? coordenado ao ?tomo central nos complexos. / Were synthesized in this work in the following aqueous solution coordination
compounds: [Ni(LDP)(H2O)2Cl2].2H2O, [Co(LDP)Cl2].3H2O, [Ni(CDP)Cl2].4H2O,
[Co(CDP)Cl2].4H2O, [Ni(BDZ)2Cl2].4H2O and [Co(BDZ)2Cl2(H2O)2]. These
complexes were synthesized by stoichiometric addition of the binder in the respective
metal chloride solutions. Precipitation occurred after drying the solvent at room
temperature. The characterization and proposed structures were made using
conventional analysis methods such as elemental analysis (CHN), absorption
spectroscopy in the infrared Fourier transform spectroscopy (FTIR), X-ray diffraction
by the powder method and Technical thermoanalytical TG / DTG (thermogravimetry /
derivative thermogravimetry) and DSC (differential scanning calorimetry). These
techniques provided information on dehydration, coordination modes, thermal
performance, composition and structure of the synthesized compounds. The results of
the TG curve, it was possible to establish the general formula of each compound
synthesized. The analysis of X-ray diffraction was observed that four of the synthesized
complex crystal structure which does not exhibit the complex was obtained from Ldopa
and carbidopa and the complex obtained from benzimidazole was obtained crystal
structures. The observations of the spectra in the infrared region suggested a
monodentate ligand coordination to metal centers through its amine group for all
complexes. The TG-DTG and DSC curves provide important information and on the
behavior and thermal decomposition of the synthesized compounds. The molar
conductivity data indicated that the solutions of the complexes formed behave as a nonelectrolyte,
which implies that chlorine is coordinated to the central atom in the
complex.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/21134 |
| Date | 27 January 2016 |
| Creators | Ara?jo, Antonio Marcos Urbano de |
| Contributors | 31482015404, Borges, Filipe Martel de Magalh?es, 83724427468, Martins, Daniel Freitas Freire, 05305550424, Santos, Klecia Morais dos, 00836353439, Oliveira, ?tom Anselmo de, Moura, Maria de F?tima Vit?ria de |
| Publisher | Universidade Federal do Rio Grande do Norte, PROGRAMA DE P?S-GRADUA??O EM QU?MICA, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/doctoralThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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