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Evidence for General Base Catalysis by Protic Solvent and Solvolysis of 1-(Phenylmethoxycarbonyl)pyridinium Ion

등록일
2009년 8월 21일 15시 55분 25초
접수번호
1546
발표코드
37P311포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅲ>
발표형식
포스터
발표분야
유기화학
저자 및
공동저자
최송희, 성미혜, 경진범, Dennis N. Kevill1
한양대학교 응용화학과, Korea
1Department of Chemistry, Northern Illinois University, United States
The kinetics of nucleophilic substitution reactions of 1-(phenylmethoxycarbonyl)pyridinium ion, prepared with the essentially non-nucleophilic/non-basic trifluoromethanesulfonate as the counterion, have been studied increasing concentration of methanol in acetonitrile as a solvent. Experimental second-order rate coefficients(k2exp) and calculated second-order(k2) and third-order(k3) rate coefficients were observed. A Grunwald-Winstein equation treatment of the specific rate of solvolysis for the 1-(phenylmethoxycarbonyl)pyridinium ion could be carried out in terms of variations in solvent nucleophilicity, and an appreciable sensitivity to changes in solvent nucleohilicity was found. log(k/k0)=lNT+mYCl+c , log(k/k0)=lNT+c

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