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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 28, Number 2
JKCSEZ 28(2)
April 20, 1984 

 
Title
On the Aquation of Dichloro Bis-(Ethylenediamine)-Chromium (Ⅲ) Cation

Dichloro Bis-(Ethylenediamine)-Chromium (Ⅲ) 양이온의 수화반응
Author
Jung-Ui Hwang, Jong-Jae Chung, Soung-Oh Bek

황정의, 정종재, 백성오
Keywords
Abstract
cis - [Cr(en)2Cl2]+ 착물의 수화반응에 대한 연구를 전기전도도법에 의해. 온도는 15℃ ~ 30℃에서 압력은 1~2000bar의 범위에서 실시하였다. 반응속도는 온도가 증가함에 따라 증가하고, 압력이 증가하면 감소하였다. 활성화부피(ΔV≠)는 25℃, 1bar에서 1.82cm2/mole로 비교적 작은 양의 값을 나타내었으며, 이 값은 압력이 증가함에 따라 감소하고 온도 증가에 따라서는 증가하였다. 활성화엔트로피(ΔS≠)는 25℃, 1bar에서 -9.019 eu로 작은 음의 값을 나타내었다. 활성화파라미터의 값으로부터 수화반응의 메카니즘은 교환해리(Id)메카니즘인 것으로 밝혀졌다.

Aquation reaction kinetics of [Cr(en)2Cl2]+complex was carried by the electric conductivity method. Its temperature range was 15℃ to 30℃ and pressure was varied up to 2,000 bars. The reaction rate was increased with increasing temperature, but was reversed to increasing pressure. The activation volume(ΔV≠) was increased with increasing temperature and decreased with increasing pressure. At 25℃ and 1 bar it was fairly small positive value, 1.82cm2/mole. Activation entropy change(ΔS≠) was calculated as small negative value,-9.019 eu, at 25℃ and 1bar. Referring to the thermodynamic parameters, it was estimated that aquation reaction was proceeded by the interchange-dissociation(Id) mechanism.

Page
95 - 101
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