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Polarographic investigation of water-soluble isothiocyanates. I. Sodium salts of 1-isothiocyanatonaphthalenesulfonic acids

E. Gono, M. Uher, and A. Beňo

Department of Analytical Chemistry, Faculty of Natural Sciences, Komenský University, Bratislava

 

Abstract: The following compounds were synthesized and submitted to Polarographie investigation: sodium l-isothiocyanate-4-naphthalene sulphonate, sodium l-isothiocyanate-5- -naphthalene sulphonate, sodium l-isothiocyanate-6-naphthalene sulphonate and sodium 1-isothiocyanate-7-naphthalene sulphonate. El/2 and the limiting currents were measured in dependence on pH. In the acid area, all four compounds under investigation are reduced and produce two waves, in the basic area they produce one wave. The number of the electrons which take part in the reduction of one molecule of the depolarisator are measured by millicoulometry. The results proved that the reduction process as it was suggested by H. Lund [5] was correct. Further it was found that the influence of the sulpho group on the reduction of the isothiocyanate group was very small.

Full paper in Portable Document Format: 221a68.pdf (in Slovak)

 

Chemical Papers 22 (1) 68–72 (1968)

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