학술논문
Studies on the Ruthenium Complexes. IX. Kinetic Studies on the Deaquation-anation Reaction of Aquapentaammineruthenium(III) Complexes
Document Type
Article
Source
Bulletin of the Chemical Society of Japan; January 1975, Vol. 48 Issue: 1 p262-265, 4p
Subject
Language
ISSN
00092673; 13480634
Abstract
The deaquation-anation reaction of [Ru(OH2)(NH3)5]X3-type complexes in the solid state, as shown by the [Ru(OH2)(NH3)5]X3(s)→[RuX(NH3)5]X2(s)+H2O(g) equation, where X is Cl, Br, I, and NO3respectively, was kinetically studied by means of thermogravimetry (TG) along with differential thermal analysis (DTA). The activation energy and entropy in the reaction process (Eakcal/mol, ΔS\eweqe.u.) are, respectively, found by isothermal kinetic study to be (22.7, −7.1) for the chloride, (23.4, −5.2) for the bromide, (26.7, 5.8) for the iodide, and (19.3, −15.9) for the nitrate. The reaction seems to proceed through the following two steps, except in the case of the iodide: [Ru(OH2)(NH3)5]X3→[RuX(OH2)(NH3)5]X2→[RuX(NH3)5]X2+H2O. The first step is regarded as the rate-determining one.