DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Shim, Sang-Chul | - |
dc.contributor.advisor | 심상철 | - |
dc.contributor.author | Kim, Sung-Sik | - |
dc.contributor.author | 김성식 | - |
dc.date.accessioned | 2011-12-13T04:54:39Z | - |
dc.date.available | 2011-12-13T04:54:39Z | - |
dc.date.issued | 1982 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=63262&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/32312 | - |
dc.description | 학위논문(석사) - 한국과학기술원 : 화학과, 1982.2, [ ii, 59 p. ] | - |
dc.description.abstract | Thermochemistry and photochemistry of picolyl chlorides were studied. The thermal reaction in benzene solution of 2-picolyl chloride afforded intermolecular condensation product, i.e., a quaternary salts. 2-Picolyl halide is known to give a self-condensation product. In the case of 3-picolyl chloride, polymers were obtained. The highly molecular weight polymer was not soluble in almost all the solvents. A cyclic hexamer was not formed because of the steric strain and the low reactivity. Thermolysis of 4-picolyl chloride gave not only a polymer but also a cyclic hexamer. The properties of the polymer was similar to that of the poly-3-chloromethyl pyridine, i.e., a highly molecular weight polymer. Absorption spectrum of a cyclic hexamer which was identified by NMR spectrum showed $\lambda_{\max}$ at 460 nm. This absorption data was similar to Berlin``s experiment(480 nm) in which the cyclic structure had not been proposed. The cyclic hexamer was cloven to the linear structure. It was soluble in water and methanol. Photolysis of 2-picolyl chloride at 253.7 nm gave a para-isomer followed by polymerization. Because chloromethyl group of 2-picolyl chloride has not a double bond character, it can not play a part in activating the hydrogens of the chloromethyl moiety. So aniline can not be produced via a Dewar pyridine. It is reasonable that the photoisomerization product is obtained by way of a prismane intermediate. The product favored the polymerization. 2-Methyl pyridines substituted $CH_3O$, iso-PrO, or EtO for H of the $CH_3$ group did not photoisomerized to the corresponding anilines or para-substituted pyridines within the range of the time used for 2-picolyl chloride. Thermolysis of picolyl chlorides in an acidic methanol solution did not afford any product. | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.title | Photochemistry and thermochemistry of picolyl chlorides | - |
dc.title.alternative | 피콜릴클로라이드의 광반응과 열반응 | - |
dc.type | Thesis(Master) | - |
dc.identifier.CNRN | 63262/325007 | - |
dc.description.department | 한국과학기술원 : 화학과, | - |
dc.identifier.uid | 000801045 | - |
dc.contributor.localauthor | Shim, Sang-Chul | - |
dc.contributor.localauthor | 심상철 | - |
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