Kinetic studies for cyclization of carbon-centered radicals to N-aziridinyl imino group탄소 중심 라디칼의 아지리디닐 이민에 대한 고리화 반응의 반응 속도론적 연구

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dc.contributor.advisorKim, Sung-Gak-
dc.contributor.advisor김성각-
dc.contributor.authorCheong, Jae-Ho-
dc.contributor.author정재호-
dc.date.accessioned2011-12-13T05:00:37Z-
dc.date.available2011-12-13T05:00:37Z-
dc.date.issued1995-
dc.identifier.urihttp://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=98760&flag=dissertation-
dc.identifier.urihttp://hdl.handle.net/10203/32716-
dc.description학위논문(석사) - 한국과학기술원 : 화학과, 1995.2, [ iii, 51 p. ]-
dc.description.abstractThe radical cyclization of N -aziridinyl imines has been known to provide a reliable method for generating 5- and 6-membered ring radicals from acyclic radical precursors. The kinetic studies for intramolecular addition of carbon-centered radicals to N-aziridinyl imino group were carried out. The kinetic data have been obtained by the relative ratio of the cyclized product and the direct reduction product in the presence of a large excess amount of tributyltin hydride. The cyclized products consisted of two products resulting from further cyclization of the intermediate radical via cyclopropyl rearrangement. The ratio of two products was analyzed by HPLC, from which the rate constant(k) was obtained. The value of rate constant$(k(C=N-Az)^6)$ was $7.3\times10^5s^{-1}$. This value was similar to the rate constant$(k(C=C)^5)$ value for the 5-exo radical cyclization of carcon-centered radical to a double bond. In addition, the rate constant $(k(C=N-Az)^5)$ value of 5-exo cyclization by carboncentered radical to N-aziridinyl imino group may be larger than $1\times10^8s^{-1}$, but the exact value was not obtained.eng
dc.languageeng-
dc.publisher한국과학기술원-
dc.titleKinetic studies for cyclization of carbon-centered radicals to N-aziridinyl imino group-
dc.title.alternative탄소 중심 라디칼의 아지리디닐 이민에 대한 고리화 반응의 반응 속도론적 연구-
dc.typeThesis(Master)-
dc.identifier.CNRN98760/325007-
dc.description.department한국과학기술원 : 화학과, -
dc.identifier.uid000933461-
dc.contributor.localauthorKim, Sung-Gak-
dc.contributor.localauthor김성각-
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CH-Theses_Master(석사논문)
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