• 대한화학회지
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• 제17권5호
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• pp.363-370
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• 1973

$\alpha$-Cyano-$\beta$-piperonylacrylic acid에 대한 n-Propylmercaptan의 친핵성 첨가반응 속도 상수를 측정하여 넓은 pH 범위에서 잘 맞는 반응속도식을 구하였다. 이 식에 의하면 넓은 pH 범위에서 일어나는 복잡한 반응메카니즘을 정량적으로 잘 설명할 수 있었다. 즉 pH4.5이하에서는 $\alpha$-Cyano-$\beta$-piperonylacrylic acid에 mercaptan이 직접 첨가되며 pH 4.5∼6.5 사이에서는 주로 $\alpha$-Cyano-$\beta$-piperonylacrylic ion에 mercaptan 분자가 첨가되고 pH 7.5 부터는 $\alpha$-Cyano-$\beta$-piperonylacrylic ion에 mercaptan 분자와 mercaptide ion의 첨가가 경쟁적으로 일어나며 pH 10이상에서는 $\alpha$-Cyano-$\beta$-piperonylacrylic anion에 mercaptide ion의 첨가만이 일어남을 알 수 있었다.

• Bulletin of the Korean Chemical Society
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• 제34권3호
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• pp.777-782
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• 2013

In order to further reduce the sulfur content in liquid hydrocarbon fuels, a desulfurization process by adsorption for removing dimethyl sulfide (DMS) and propylmercaptan (PM) was investigated. Bentonite adsorbents modified by $CuCl_2$ for the desulfurization of model oil was investigated. The results indicated that the modified bentonite adsorbents were effective for adsorption of DMS and PM. The bentonite adsorbents were characterized by X-ray diffraction (XRD) and thermal analysis (TGA). The acidity was measured by FT-IR spectroscopy. Several factors that influence the desulfurization capability, including loading and calcination temperature, were studied. The maximum sulfur adsorption capacity was obtained at a Cu(II) loading of 15 wt %, and the optimum calcination temperature was $150^{\circ}C$. Spectral shifts of the ${\nu}$(C-S) and ${\nu}$(Cu-S) vibrations of the complex compound obtained by the reaction of $CuCl_2$ and DMS were measured with the Raman spectrum. On the basis of complex adsorption reaction and hybrid orbital theory, the adsorption on modified bentonite occurred via multilayer intermolecular forces and S-M (${\sigma}$) bonds.

• 대한화학회지
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• 제12권4호
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• pp.177-183
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• 1968

親核性 添加反應性에 있어서의 mucleophile의 反應性을 정량적으로 연구하고자 前報에 이어 여러 pH에서 3,4-methylenedioxy-$\beta$-nitrostyrene에 n-propyl- 과 tert-butylmercaptan을 첨가시켜 그의 添加反應速度常數를 측정한 결과 n-propylmercaptide ion과 tert-butylmercaptide ion에 대해 각각 $1.26{\times}10^8$과 $3.98{\times}10^6\;M^{-2},\;sec^{-1}$를 얻었으며, 또 n-propyl 및 tert-butylmercaptan 분자의 添加反應速度常數로서 $7.07{\times}10^{-3}$과 $1.5{\times}10^3\;M^{-1},\;sec^{-1}$을 각각 얻었다. 한편 염기성 뿐만 아니라 산성용매 속에서도 그의 應速 메카니즘을 잘 설명할 수 있는 全體應速度式을 구하였다.