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

Kinetics study of substitution reactions of chromium(III) complexes. Kinetics substitution reactions of trans-thiocyanatobis(ethylenediamine)chromium(III) ions in methanol. I

V. Holba

Faculty of Natural Sciences, Komenský University, Bratislava

Abstract: By the spectrophotometric method, kinetics of substitution reactions of the thiocyanate in trans-[Cr(SCN)₂en₂]SCN in CH₃COO^-, NO₂^-, N^3-, and CN^- medium with MeOH as a solvent was described. The reactions were detd. by measuring the changes of the absorbance at 314 mμ wavelength with 10-4 concn. of the complex salt and at 50°. The speed of the liberation of the thiocyanate depends on the strength of the acid and it is increased with weak acids and decreased with stronger acids (Cl^-, Br^-, NO₃^-). The results of the measurements can be interpreted on the basis of a dissocn. mechanism with the conjugated base as an intermediate.

Full paper in Portable Document Format: 188a561.pdf (in Slovak)

Chemical Papers 18 (8) 561–571 (1964)