Eletrophilic Reactions
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Energética e mecanismos de processos iônicos em fase gasosa / Energetics and mechanisms of gas-phase ionic processes
The study of ionic reactivity in the gas-phase has been widely explored with mass spectrometry techniques. This thesis reports experimental and theoretical results in three different areas of gas-phase ion chemistry. The ionic processes were experimentally studied by Fourier transform mass spectrometry (FTMS or FT-ICR), a high resolution method that allows f
Publicado em: 2007
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2. Novos aspectos e aplicações da química de teluranas e de teluretos orgânicos / New aspects and applications of the chemistry of organotelluranes and organic tellurides
The first part of this thesis deals with the study of the reactivity of electrophilic tellurium compounds, mainly tellurium tetrachloride and aromatic tellurium trichlorides. New aspects of the reactivity of TeCl4 towards alkynes and some acetophenones were disclosed. A mechanistic rationale for each of the processes studied was possible by the determination
Publicado em: 2005
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3. Estudo da reatividade de ions e moleculas por colisões dissociativas e reações ion-molecula em fase gasosa via espectrometria de massas pentaquadeupolar
To study the gas phase chemistry of ions and molecules, some enaminones, two heterocumulene C2NO2 isomers and several isomers of pyridinium, pyrimidinium, furanyl and thiophenyl ions were chosen as systems of interest. Enaminones, were chosen because they have been extensively studied in solution by our research group. Firstly, the eletrophilic addition of m
Publicado em: 1998
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4. Estudo das reações da monotosil-hidrazona de furila e compostos analogos na presença de alumina basica
The reactions of benzi1 monotosylhydrazone in basic medium and of 2-diazo-1,2-diphenyl-1-ethanone in neutral mediun with the nucleophiles hydrazineand benzoylhydrazine yielded the products (Ph2)CHCO-NH-NH-COR (48, R = -CH(Ph)2 e 49, R = -Ph) which result from the reaction of the nucleophile with the intermediate diphenylketene formed by the Wolff rearrangeme
Publicado em: 1989
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5. Reatividade de diazirinas e diaziridinas com compostos de paladio (II) em solventes proticos e aproticos
In this work, 3,3-pentamethylenediaziridine, N-methyl-3,3-pentamethylenediaziridine and N-cyclohexyl-3,3-pentamethylene diaziridine were prepared, as described in the literature. The coordination of these diaziridines with palladium(II) compounds was studied; these heterocycles react with bis-benzoni-trile-dichloropalladium(II), yielding air stable complexes
Publicado em: 1988