IDENTIFICATION OF AMMONIUM HEXAFLUOROSILICATES USING CHEMICAL METHODS OF ANALYSIS
DOI:
https://doi.org/10.32782/2226-2008-2023-4-18Keywords:
ammonium hexafluorosilicates, anti-caries agents, identificationAbstract
Research goal. The aim of the work is to investigate the possibilities of chemical analysis methods for the identification of potential anti-caries agents – 3-hydroxymethyl-, 4-hydroxymethylpyridinium, 2-carboxymethylpyridinium and octenidinium hexafluorosilicates (I-IV, respectively). Materials and methods. Compounds I-IV were synthesized earlier. It involved general alkaloid precipitation reagents, benzidine, 2,4-dinitrochlorobenzene, tropeolin 00, 000, iron (III) chloride, nickel (II) chloride, cobalt (II) nitrate – commercial preparations. Results and discussion. The analysis procedures included the identification of the pyridine ring, hydroxymethyl and carboxyl groups, hexafluorosilicate anion in I-IV. 1% aqueous and methanolic solutions of I-IV were used. It was established that the reaction of the opening of the pyridine ring can be used for the identification of I-IV, followed by the confirmation of the formation of the derivative glutaconaldehyde and the reaction with general alkaloid precipitation reagents. Identification of the SiF6 2– anion was carried out following standard reactions on the fluoride ion, taking into account its hydrolysis in dilute aqueous solutions with the formation of fluoride ions. Some characteristic reactions of identification of salts were revealed, in particular reactions of the formation of ionic associates with azo dyes tropeolins, which are extracted with chloroform.
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