Non-aqueous Titration of Phenols. I
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چکیده
منابع مشابه
Coulometric titration of acids in non-aqueous solvents.
Coulometric titrations of mineral acids, sulphonic acids, carboxylic acids, enols, imides and phenols have been carried out in t-butanol or in acetone with electrically generated tetrabutylammonium hydroxide. Either a potentiometric titration or a visual indicator end-point may be used. The amount of acid titrated ranges from 10 to 60 muequiv, and the precision and accuracy of the method are ex...
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Nitration of phenol and various 4-substituted phenols with Cu(NO3)2.3H2O, Cu(NO3)2.3H2O/SiO2, 9H2O and Cr(NO3)2. 9H2O in different anhydrous organic solvents are investigated. High selectivity ratio of para vs ortho isomers has been observed. Mono- and dinitro compounds f...
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Alpha-hydroxylic acids are widely used in the treatment and control of skin disorders. Azelaic acid is a naturally occuring Alpha-hydroxy acid that can be formed endogenously from long-chain dicardoxylic acids, metabolism of oleic acid or omega oxidation of mono carboxylic acids. It shows bacteriostatic and bactericidal activities against aerobic and anaerobic micro-organisms present on acne-be...
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An inexpensive, simple, precise and rapid method for the determination of fluoroquinolone gatifloxacin in tablets is described. The procedure is based on the use of volumetric dosage in a non-aqueous medium in glacial acetic acid with 0.1 M perchloric acid. The method validation yielded good results and included the precision, recovery and accuracy. It was also found that the excipients in the ...
متن کاملa reinvestigation of nitration of phenols with metal nitrates under non-aqueous and aprotic conditions
nitration of phenol and various 4-substituted phenols with cu(no3)2.3h2o, cu(no3)2.3h2o/sio2, 9h2o and cr(no3)2. 9h2o in different anhydrous organic solvents are investigated. high selectivity ratio of para vs ortho isomers has been observed. mono- and dinitro compounds from phenol and 4-substituted phenols by choosing the proper solvents and reaction conditions, are also obtained with high sel...
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ژورنال
عنوان ژورنال: YAKUGAKU ZASSHI
سال: 1954
ISSN: 0031-6903,1347-5231
DOI: 10.1248/yakushi1947.74.9_971