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Synthese, Struktur und Bindungseigenschaften neuer IonophoreFricke, Tom. January 1900 (has links) (PDF)
Regensburg, Univ., Diss., 2001. / Erscheinungsjahr an der Haupttitelstelle: 2001. Computerdatei im Fernzugriff.
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Synthese, Struktur und Bindungseigenschaften neuer IonophoreFricke, Tom. January 1900 (has links) (PDF)
Regensburg, Univ., Diss., 2001. / Erscheinungsjahr an der Haupttitelstelle: 2001. Computerdatei im Fernzugriff.
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Evaluation of Lewis acid catalysed and other nitration strategies for the selective nitration of cresolsVan Niekerk, Rudolf Jacob Francois January 2001 (has links)
The nitration of m- and p-cresol was investigated under mild reaction conditions in a number of solvents; the effects of certain nitration catalysts were also evaluated. These different reaction parameters were evaluated in terms of their effect on a number of important reaction responses. Other important factors that were investigated were the manipulation of the isomer ratios by changing reaction parameters, as well as important process chemistry information, such as product distribution, isolation and purification, identification of side products formed, and evaluation of the heat of reaction. Use was made of an experimental design system to evaluate the effect of reaction parameters on the chosen design responses. It was found that the ratio of para to ortho nitrocresol products could be influenced slightly by using low concentrations of nitric acid and low reaction temperatures. A different mechanism for the formation of 2-methyl-1,4-benzoquinone (from mcresol nitration) was proposed (compared with that previously reported), which could explain a “one mole nitric acid” pathway and the fact that only the pbenzoquinone isomer was observed. Reaction side products were identified and found to consist of dimers of cresol and nitrocresol, which were probably the result of oxidation of the cresol, subsequent formation of a quinomethide intermediate and reaction with either the product or the substrate. The heat of nitration was determined for various reaction systems and found to be governed by two factors, namely the actual nitration process and also an oxidation process, which is responsible for the formation of side products.
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Electrochemical modification of proteins for biosensorsKendall, Georgina January 2002 (has links)
No description available.
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A quantitative study of the nitration of the 1- and 2- methyl and methoxynaphthalenesAlcorn, P. G. E. Unknown Date (has links)
No description available.
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Vapor phase nitration of benzeneWilhelm, Richard Herman, January 1935 (has links)
Thesis (Ph. D.)--Columbia University, 1935. / Vita. Bibliography: p. 30.
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The nitration of nitrobenzenePounder, Frederick E. January 1935 (has links)
No description available.
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Aromatic nitration using aqueous nitric acidBelson, D. J. January 1989 (has links)
The rates of nitration of benzene, toluene, anisole, p-xylene and mesitylene in aqueous nitric acid have been determined for concentratians in the range 24-41 mol % HNO3 and at temperatures between 293 and 333K. Correlation of rate constants with values of acidity function confirms that the mechanism of nitration in aqueous nitric acid is similar to that in aqueous Sulphuric acid.
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Nitration of Thiophene Analogs of DDTButtram, Jack Rhea 02 1900 (has links)
Since thiophene very often yields compounds that are analogous to benzene derivatives in general physiological properties, it was decided to attempt to prepare the nitro and amino derivatives of 1,1,1-trichloro-2,2-bis-(2-thienyl)-ethane (V) as well as the nitro and amino derivatives of 2,2,3-trichloro-1,1-bis-(2-thienyl)-butane (VI).
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Optimisation de la nitration et de la dépolymérisation de la cellulosePetit, Fabien 15 December 2008 (has links)
Résumé / Abstract
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