Nitrocarbon acids

Many pK values for nitrocarbon acids are in the compilations of Palm and colleagues182. A comprehensive study of the ionization of many carbon acids in DMSO has been made by Bordwell and colleagues and many of them are nitro compounds183. 

Recent studies of kinetic acidity involving nitrocarbon acids have included the following benzoate ion-promoted deprotonation of (3- or 4-nitrophenyl)nitromethane and (3,5-dinitrophenyl)nitromethane187 the deprotonation by various bases of a series of... 

In the determination of benzene, interfering effects of dinitrotoluene and dinitroxylenes originating from toluene and xylenes are removed by oxidation of methyl groups with a chromic acid solution. Dinitrobenzene is stable during this oxidation process. After adding pyridine and alkalization of the diluted nitration mixture, the two layers are separated from each other. Sodium salts of nitrocarbonic acids formed by the oxidation remain in the aqueous layer, whereas m-dinitrobenzene passes into the pyridine layer. The pyridine layer is separated, methyl ethyl ketone is added and the red-violet colour is evaluated by photometry [18]. 

Various types of reaction of carbon acids are believed to proceed via dehydronation (commonly referred to as deprotonation)notably halogenation in the presence of bases, and the rates of such processes are a measure of the kinetic acidities of the carbon acids. Extensive data of this nature exist, including some for nitrocarbon acids. In recent years kinetic acidity has also been studied through the detritiation of appropriately triti-ated compounds. The existence also of equilibrium acidity data under the same conditions permits rate-equilibrium correlations of the Brdnsted type , as well as Hammett treatments in appropriate cases. Studies of the rates of reaction of a given substrate with a series of bases also generate Brdnsted correlations, and in appropriate cases also Hammett correlations. 

Acids, alkalis, oxidizing agents. More readily attacked by solvents than UPVC. Attacked by solvents such as tetrahydrofu-ran, cyclohexanone, methyl ethyl ketone (MEK), dimethyl-formanide. Plasticized PVC is also readily swollen aromatic and chlorinated hydrocarbons, nitrocarbons, acetic anhydride, aniline and acetone. 

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