ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Polarographic studies of some keto-isonitroso derivatives of indan

I. Zelenský, S. Stankoviansky, Dagmar Zacharová-Kálavska, and A. Košturiak

Institut für analytische Chemie der NaturwissenschaftlicJien Fakultät an der Komenský-Universität, Bratislava 1

Abstract: Polarographic research of five keto-isonitroso derivatives of indan was performed. The relation between dissociation constants of the studied derivatives and the pertinent values of half-wave potentials of oxime group was established. The oxime group, whether it belongs to the protonized, non- -protonized or dissociated form of compound, yields only one four-electron wave over the whole range of pH. In case of 1,3-indandionedioxime, both oxime groups yield simultaneously one eight-electron wave. Dependence of the limiting current of this wave on pH has the shape of a dissociation curve. With regard to this it may be assumed that this least acidic derivative is polarographically active only in the protonized form. Carbonyl groups of 2-isonitroso-l,3-indandione yield in acid medium, similarly as carbonyl groups of indan-1,3-dione, two two-electron waves. In basic medium, in contrast to indan-1,3-dione, it yields one four-electron wave.

Full paper in Portable Document Format: 232a94.pdf (in German)

Chemical Papers 23 (2) 94–100 (1969)