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

Polarographic Study of the Reactions of cis- and írans-Dicyanochromium(III) Complexes with Hg²⁺ Ions

M. Rievaj, J. Mocák, and D. Bustin

Department of Analytical Chemistry, Faculty of Chemical Technology, Slovak University of Technology, SK-812 37 Bratislava

E-mail: rievaj@cvt.stuba.sk

Abstract: Potentiometry and polarography were used to study the reactions of some cis- and trans-dicyanochromium(III) complexes with Hg(ClO₄)₂. Potentiometric investigation revealed the different stoichiometry of the reactions of cis and trans complexes. The results of polarographic study were consistent with the potentiometric investigations of the reaction stoichiometry and enabled to propose the course of the reaction and the structure of the reaction products. It was found that the configuration of the cyano groups cis or trans of the chromium(III) complex plays a crucial role in the structure of oligonuclear compounds. It is supposed that cis-dicyano complexes may associate either through single or double bridges. The latter circumstance is not incurred with trans-dicyano complexes obviously because of the unfavourable cyano groups position.

Full paper in Portable Document Format: 552a104.pdf

Chemical Papers 55 (2) 104–109 (2001)