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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, Komensk√Ĺ University, Bratislava


Abstract: By the spectrophotometric method, kinetics of substitution reactions of the thiocyanate in trans-[Cr(SCN)2en2]SCN in CH3COO-, NO2-, N3-, 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)

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