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  • 09월 12일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제110회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Further Kinetic Studies of Solvolytic Reactions of Isobutyl chloroformate in solvents of high Ionizing Power under Conductmetric conditions

등록일
2012년 9월 5일 14시 59분 33초
접수번호
1705
발표코드
PHYS.P-382 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
10월 17일 (수요일) 16:00~19:00
발표형식
포스터
발표분야
물리화학
저자 및
공동저자
류준하, 김문무
동의대학교 화학과, Korea
Abstract Solvolyses of isobutyl chloroformate (4) in 43 binary solvent mixtures including highly aqueous media, water, D2O, CH3OD, 2,2,2-trifluoethanol (TFE) as well as aqueous 1,1,1,3,3,3-hexafluoro-isopropanol (HFIP) solvents were performed at 45oC, in order to further investigate the recent results of D`Souza, M,J1.et. al. (2011. Beilstein J. Org. Chem.); solvolyses of 4 are found to be consistent with the proposed mechanism (AdE). The variety of solvent systems was extended to comprise highly ionizing power solvent media (YCl > 2.7 excepted for aqueous fluorinated solvents and pure TFE solvent) to investigate whether a mechanistic change occurs as solvent compositions are varied. However, in case of 18-solvent ranges having aqueous fluorinated solvent systems (TFE-H2O and HFIP-H2O) excepted as well as YCl > 2.7 solvent systems, the solvent effect on reactivity for those of 4 are evaluated by the multiple regression analysis as competition with SN2 - type mechanism. And in pure TFE and 97 w/w % HFIP solvents with high YCl and weak NT, these solvolyses are understood as reactions which proceed through an ionization (SN1) pathway.

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