DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Do, Young-Kyu | - |
dc.contributor.advisor | 도영규 | - |
dc.contributor.author | Lee, Min-Hyung | - |
dc.contributor.author | 이민형 | - |
dc.date.accessioned | 2015-04-23T02:22:37Z | - |
dc.date.available | 2015-04-23T02:22:37Z | - |
dc.date.issued | 2001 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=165649&flag=dissertation | - |
dc.identifier.uri | http://hdl.handle.net/10203/196480 | - |
dc.description | 학위논문(박사)- 한국과학기술원: 화학과, 2001.2, [ xi, 195 p. ; ] | - |
dc.description.abstract | Abstract A novel ${\it C_s}$-symmetric yttrocene complex, {\it ansa}-Me$_2$Si($\eta^3$-Flu)( $\eta^5$-Cp’)YCl$_2$Li(OEt$_2$)$_2$ ({\bf 3}) (Flu = C$_13$H$_8$, fluorenyl; Cp’ = C$_5$Me$_4$) has been prepared via salt metathesis reaction from anhydrous YCl$_3$ and dilithium salt of the ligand {\it ansa}-Me$_2$Si(FluH)(Cp`H). Treatment of {\bf 3} with NaN(SiMe$_3$)$_2$ gave the corresponding bis(trimethylsilyl)amide derivative, {\it ansa}-Me$_2$Si(Flu)($\eta^5$-Cp’)YN(SiMe$_3$)$_2$ ({\bf 4}). The X-ray structure of {\bf 3} reveals unusual $\eta^3$-fluorenyl coordination to the Y$^{3+}$ ion. In {\bf 4}, the Y-Flu bonding being partially slipped toward $\eta^3$ from $\eta^5$, $\pi$-dative bonding nature in Y-N bond and a direct interaction of the Y atom with one methyl group of N(SiMe$_3$)$_2$ fragment are present. Both compounds constitute the first examples of structurally characterized fluorenyl {\it ansa}-yttrocenes. The neutral compound {\bf 4} is active for the polymerization of methyl methacrylate (MMA) in toluene, affording iso-rich poly(MMA)s. A series of novel ${\it C_1}$-symmetric group 4 {\it ansa}-metallocene complexes, Me$_2$Si(C$_5$Me$_4$)(R-Ind)MCl$_2$ (R = H, M = Ti ({\bf 5a}), Zr ({\bf 5b}); R = 2-Me, M = Ti ({\bf 6a}), Zr ({\bf 6b}); R = 3-Me, M = Ti ({\bf 7a}), Zr ({\bf 7b}); R = 3-{\it t}-Bu, M = Ti ({\bf 8a}), Zr ({\bf 8b})) were prepared from the reaction of dilithium salt of the corresponding ligands Me$_2$Si(C$_5$Me$_4$H)(R-IndH) (R = H ({\bf 5}), 2-Me ({\bf 6}), 3-Me ({\bf 7}), and 3-{\it t}-Bu ({\bf 8})) with appropriate group 4 metal halides. Crystal structures of {\bf 5a, 6a, 6b}, and {\bf 8b} have been determined by X-ray diffraction study, which showed chiral, ${\it C_1}$-symmetric nature of them irrespective of kinds of the metal and the ligand. The complexes {\bf 5a, 5b, 6a}, and {\bf 6b} were also tested for the polymerization of propylene in the presence of methylaluminoxane(MAO) under various reaction temperatures. All ... | eng |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Metallocene | - |
dc.subject | 폴리올레핀 | - |
dc.subject | 중합 | - |
dc.subject | 올레핀 | - |
dc.subject | 유기금속 촉매 | - |
dc.subject | 메탈로센 | - |
dc.subject | Organometallic Catalyst | - |
dc.subject | Olefin | - |
dc.subject | Polymerization | - |
dc.subject | Polyolefin | - |
dc.title | Single-site organometallic catalysts for olefin polymerization | - |
dc.title.alternative | 올레핀 중합용 단일자리 유기금속 촉매에 관한 연구 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 165649/325007 | - |
dc.description.department | 한국과학기술원:화학과, | - |
dc.identifier.uid | 000975259 | - |
dc.contributor.localauthor | Do, Young-Kyu | - |
dc.contributor.localauthor | 도영규 | - |
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