Journal of the Korean Chemical Society (대한화학회지)

Korean Chemical Society (대한화학회)
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Rate and Mechanism for Substitution of Chloropentaamminecobalt(III) in Aqueous $Hg^{2+}$ Solution

$Hg^{2+}$이온 水溶液 內에서의 Chloropentaamminecobalt(III)의 置換反應速度와 메카니즘 (제 1 보)

  • 박병각 (영남대학교 이과대학 화학과) ;
  • 이재원 (영남대학교 이과대학 화학과) ;
  • 임주상 (영남대학교 이과대학 화학과)
  • Published : 1986.06.20
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Abstract

Kinetic studies were carried out for the substitution of $H-2$O for $Cl^-$ ligand of chloropentaamminecobalt(III) in the presence of $Hg^{2+}$ catalyst by UV spectrophotometer. It has been found that $Hg^{2+}$ ion appears first order dependence and the overall reaction is second order. The reaction system can be believed to occur via $S_N2$ reaction, because the calculated rate equation for our presumed $S_N2$ mechanism is in agreement with the observed one.

Chloropentaamminecobalt(III)의 $Cl^-$리간드와 물 分子의 置換反應에서 H$g^{2+}$ 이온 觸媒의 역할을 알기 위하여 UV分光法으로 速度論的 硏究를 하였다. 觸媒촉매가 一次일차 反應반응形式형식으로 反應반응에 관여함을 알았으며, 觸媒촉매를 考慮 했을때의 速度常數 $k_{obs}$는 3.366$l{\cdot}mol^{-1}sec^{-1}$의 값을 얻었다. 아울러 總括反應은 二次反應 임을 알았으며, $S_N2$ 反應機構로 進行되는 反應 메카니즘을 提案하였다.

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