Showing papers on "Potassium iodate published in 1973"
TL;DR: An iodatometric method for the determination of organoisothiocyanates is described in this article, where the isothio-yanates are quantitatively converted with n-butyl-amine in dimethyl-formamide medium into the corresponding symmetrical NN-disubstituted thioureas, which are titrated visually or potentiometrically in acidic medium with potassium iodate solution.
Abstract: An iodatometric method for the determination of organoisothiocyanates is described The isothiocyanates are quantitatively converted with n-butyl-amine in dimethylformamide medium into the corresponding symmetrical NN-disubstituted thioureas, which are titrated visually or potentiometrically in acidic medium with potassium iodate solution Methods have also been developed for the analysis of isothiocyanate-isocyanate and isothiocyanate-thiourea mixtures on the same sample solution A known excess of the standard n-butylamine solution added to the mixture in dimethyl-formamide converts the isothiocyanate and isocyanate into the corresponding disubstituted thiourea and urea, respectively Acidimetric titration of the excess of amine, and iodatometric titration of the thiourea present and formed, enable the particular mixture to be analysed for both constituents The end-points can be detected both visually and potentiometrically The methods described are simple, accurate, reliable and widely applicable
7 citations
Patent•
23 Jan 1973
TL;DR: In this paper, the authors present a comparison for sterilizing water consisting of: (1) 1 to 5 PARTS by WEIGHT of an OXIDIZING AGENT SELECTED from the group consisting of PotASSIUM DICHROMATE, POTASSIUM IODIDE and MIXTURES THEREOF; (2) 10 TO 50 PARTS By WEIGHT Of At Least One ACID SELECTED From the Group Consisting of TARTIARIC, CITRIC and ADIPIC ACIDS; (3
Abstract: 1 A COMPOSITION FOR STERILIZING WATER CONSISTING ESSENTIALLY OF: (A) 1 TO 5 PARTS BY WEIGHT OF AN OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OFPOTASSIUM DICHROMATE, POTASSIUM PERMANGANATE AND MIXTURES THEREOF; (B) 10 TO 50 PARTS BY WEIGHT OF AT LEAST ONE ACID SELECTED FROM THE GROUP CONSISTING OF TARTIARIC, CITRIC AND ADIPIC ACIDS; (C) 10 TO 50 PARTS BY WEIGHT OF AN ODIDE CHOSEN FROM THE GROUP CONSISTING OF SODUIM IODIDE, POTASSIUM IODIDE AND MIXTURES THEREOF; (D) 10 TO 50 PARTS BY WEIGHT OF AN IODATE CHOSEN FROM THE GROUP CONSISTING OF SODIUM IODATE, POTASSIUM IODATE AND MIXTURES THEREOF
6 citations
TL;DR: In the presence of bromide or in 0,4 n HCl the enamines 1 and 3a are halogenated to 2b, 2c or 4c.
Abstract: Wasser verhindert die Entalkylierung von 3-Trialkylammoniumphenolen in alkoholischer Kalilauge. Oxidation von 3-Dimethyl-aminophenol mit Kaliumjodat fuhrt zu den Chinonen 1, 3a und den Jodaminophenolen 5a – 7a. Bei Gegenwart von Bromid oder in 0,4 n HCl werden die Enamine 1 und 3a zu 2b bzw. 2c und 4c halogeniert.
Reactions of Neostigmin and Similar Products with Potassium Iodate
Water hinders the dealkylation of 3-trialkylammonium phenols in alcoholic potassium hydroxide. Oxidation of 3-dimethylaminophenol with potassium iodate leads to the quinones 1, 3a and the iodoaminophenols 5a – 7a. In the presence of bromide or in 0,4 n HCl the enamines 1 and 3a are halogenated to 2b, 2c or 4c.
4 citations
TL;DR: In this article, the influence of the condition of reaction of iodine and the oxidation potentials of the aminophenols are discussed and the Einflus der Reaktionsbedingungen, die Storung durch Jod und die Oxidationspotentiale der Aminophenole werden diskutiert.
Abstract: Bei der Oxidation von 3-Aminophenol mit Kaliumjodat zu 2a und 4a wird Jod in p-Stellung zur Aminogruppe bereits in das Aminophenol, Jod in o-Stellung dagegen in die Enamine 1a und 3a eingefuhrt. Aus 3-Acetaminophenol entstehen die desaktivierten Enamine 1b und 3b. Der Einflus der Reaktionsbedingungen, die Storung durch Jod und die Oxidationspotentiale der Aminophenole werden diskutiert.
Reaction of 3-Aminophenol with Potassium Iodate
During the oxidation of 3-aminophenol with potassium iodate to 2a and 4a iodination in the position p to the amino group takes place in the aminophenol, in the o-position in the enamines 1a and 3a. Oxidation of 3-acetaminophenol leads to the deactivated enamines 1b and 3b. The influence of the condition of reaction of iodine and the oxidation potentials of the aminophenols are discussed.
3 citations
TL;DR: In the presence of bromide or in 0,4 n HCl the enamines 1 and 3a are halogenated to 2b, 2c or 4c.
Abstract: Wasser verhindert die Entalkylierung von 3-Trialkylammoniumphenolen in alkoholischer Kalilauge. Oxidation von 3-Dimethyl-aminophenol mit Kaliumjodat fuhrt zu den Chinonen 1, 3a und den Jodaminophenolen 5a – 7a. Bei Gegenwart von Bromid oder in 0,4 n HCl werden die Enamine 1 und 3a zu 2b bzw. 2c und 4c halogeniert.
Reactions of Neostigmin and Similar Products with Potassium Iodate
Water hinders the dealkylation of 3-trialkylammonium phenols in alcoholic potassium hydroxide. Oxidation of 3-dimethylaminophenol with potassium iodate leads to the quinones 1, 3a and the iodoaminophenols 5a – 7a. In the presence of bromide or in 0,4 n HCl the enamines 1 and 3a are halogenated to 2b, 2c or 4c.