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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 32, Number 2
JKCSEZ 32(2)
April 20, 1988

Title	Kinetic Studies on the Aquation of Tetrahedral Copper (Ⅱ) and Cobalt (Ⅱ) Complexes 정사면체 구조를 갖는 Cu (Ⅱ) 및 Co (Ⅱ) 착화물들의 아쿠오화반응에 관한 연구
Author	Young-Inn Kim, Sung-Nak Choi, Jung-Sook Kim, Hae-Kyung Kim 김영인, 최성락, 김정숙, 김해경
Keywords
Abstract	Co(sp)X2P(sp=sparteine, C15H26N2, X=Cl, Br)과 Cu(sp)X2의 아쿠오화반응이 메카니즘을 규명하기 위하여 pH∼5인 조건에서 속도론적 연구를 실시하였다. Cu(sp)Cl2 및 Cu(sp)Br2는 halide 이온들에 의해 촉매 효과를 나타내지 않았으며 Cu(sp)Cl2 및 Cu(sp)Br2에 비해 매우 빠르게 아쿠오화가 진행되었다. Cu(sp)Cl2 및 Cu(sp)Br2는 halide cyanide의 존재에 의해 반응속도가 크게 증가하였으며 pH = 2∼5인 범위에서 pH가 증가함에 따라 반응속도가 증가하였다. 본 연구에서 얻어진 실험결과, Co(sp)X2의 아쿠오화반응이 D-메카니즘으로 진행되는 반면 Cu(sp)X2의 경우는 Id 메카니즘으로 진행되는 것으로 믿어진다. The rates of aquation of sparteine cobalt(Ⅱ) halide and sparteine copper(Ⅱ) halide were investigated in the citrate buffer solutions. The aquation of cobalt(Ⅱ) complexes proceeds via D-mechanism and the catalytic effect of halide ions is not observed. The aquation of copper(Ⅱ) complexes proceeds via Id-mechanism and is catalyzed by the presence of cyanide and halide ions, and the aquation rate is pH dependent. The different mechanistic behavior of cobalt(Ⅱ) complexes from corresponding copper(Ⅱ) complexes seems to be attributed to the weakness of Co-N bond in the coordination sphere.
Page	122 - 129
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