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카르보닐 탄소원자의 친핵성 치환반응 (제7보). 물-에탄올 및 물-아세톤 혼합용매속에서 2-염화테노일의 가용매 분해반응
손진언,윤상기,이익춘,Sohn, Jin Eon,Yoon, Sang Kee,Lee, Ik Choon 대한화학회 1976 대한화학회지 Vol.20 No.5
여러가지 조성의 물-아세톤 및 물-에탄올 혼합용매 속에서 2-염화테노일의 가용매 분해반응속도를 20 ∼ $40^{circ}C$에서 측정하여 활성화 파라미터를 계산하고 Winstein 그림표의 기울기와 혼합용매조성에 따른 속도 상수 상수의 변화를 검토하였다. 실험결과 혼합용매의 물함량이 증가할 수록 $S_N1$ 반응성이 강하게 나타남을 보았다. 그러나 염화벤조일의 가용매 분해반응속도 보다는 느림을 알았다. The rates of solvolysis for 2-thenoyl chloride have been measured in aqueous acetone and aqueous ethanol at various temperatures ranging from 20 to $40^{circ}C$. The activation parameters and the Grundwald-Winstein's slope are determined by the analysis of solvolysis rates. The results indicated that the reaction rates of solvolysis are considerably slower than those of the reaction for benzoyl chloride due to the electron donating effect of thiophene nucleus. The results also showed that the reaction proceeds with the $S_N1$ mechanism in water-rich solvents whereas the $S_N2$ character increases with the decrease of water content, and overall reaction is subject to entropy control.
활성탄에 의한 헤테로고리화합물의 흡착에 미치는 관능기의 영향
김달한,손진언,이성식 ( Dal Han Kim,Jin Eon Sohn,Sung Sik Lee ) 한국화학공학회 1995 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.33 No.6
The isotherm of heterocyclic compound in aqueous solution onto activated carbon was correlated with Freundlich type equation, and Freundlich constant product [k·n] appeared linear relationship with boiling point(T_b). Saturated adsorbed amount(q_s) decreased with hammett constant(σ), inductive constant (σ^*) and polar constant(F). Surface diffusion was considered to be dominant. Relationship between surface diffusivity(D_s) and equilibrium adsorbed amount(q_e) was D_s=D_(so)·exp[a·q_e]. Kinetic parameter D_(so) and a was shown Table 5 for kind and position of functional groups.