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새로운 메탈로센 촉매의 개발과 이를 이용한 올레핀 중합
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | 이분열 | - |
| dc.contributor.author | 조대준 | - |
| dc.date.accessioned | 2018-11-08T07:42:03Z | - |
| dc.date.available | 2018-11-08T07:42:03Z | - |
| dc.date.issued | 2006-02 | - |
| dc.identifier.other | 1028 | - |
| dc.identifier.uri | https://dspace.ajou.ac.kr/handle/2018.oak/7197 | - |
| dc.description | 학위논문(석사)--아주대학교 일반대학원 :분자과학기술학과,2006. 2 | - |
| dc.description.tableofcontents | CHAPTER 1. Syntheses and Structures of 1,2,3-Substituted Cyclopentadienyl Titanium(IV) Complexes 1. Introduction 2. Result and Discussion 2.1. Synthesis and Charaterizations 2.2. X-ray Crystallographic Studies 2.3. Conclusion ∙ 3. Experimental Section 4. References|CHAPTER 2. Phenylene-Bridged Cp/Sulfonamido Titanium Complexes for Ethylene/1-Octene Copolymerization 1. Introduction 2. Result and Discussion 2.1. Synthesis and Charaterizations 2.2. X-ray Crystallographic Studies 2.3. Polymerization Studies 3. Experimental Section 4. References|CHAPTER 3. Ortho-Phenylene-Bridged Cp/Amido Titanium Complexes for Ethylene/1-Octene Copolymerization 1. Introduction 2. Result and Discussion 2.1. Synthesis and Charaterizations 2.2. X-ray Crystallographic Studies 2.3. Polymerization Studies (conducting by LG Chem. LTD) 3. Experimental Section 4. References | - |
| dc.language.iso | eng | - |
| dc.publisher | The Graduate School, Ajou University | - |
| dc.rights | 아주대학교 논문은 저작권에 의해 보호받습니다. | - |
| dc.title | 새로운 메탈로센 촉매의 개발과 이를 이용한 올레핀 중합 | - |
| dc.title.alternative | Dae June Joe | - |
| dc.type | Thesis | - |
| dc.contributor.affiliation | 아주대학교 일반대학원 | - |
| dc.contributor.alternativeName | Dae June Joe | - |
| dc.contributor.department | 일반대학원 분자과학기술학과 | - |
| dc.date.awarded | 2006. 2 | - |
| dc.description.degree | Master | - |
| dc.identifier.localId | 565022 | - |
| dc.identifier.url | http://dcoll.ajou.ac.kr:9080/dcollection/jsp/common/DcLoOrgPer.jsp?sItemId=000000001028 | - |
| dc.description.alternativeAbstract | 2, 3. Advantages of the CGC (constrained geometry catalyst) over the conventional biscyclopentadienyl metallocene catalysts are thermal stability, high comonomer incorporation, and high molecular weight of the obtained polymers in the ethylene/-olefin copolymerizations, which enables its use in a commercial high temperature solution process.1 Various successful modifications over the standard CGC, [Me2Si(5-Me4Cp)(NtBu)]TiCl2 have been achieved by replacement of the Me4Cp unit with other -donor ligands, but modifications on the bridge unit have not been so successful. Erker reported preparation of alkylidene (R1R2C) or vinylidene (H2C=C) bridged Cp/amido complexes but their activity for ethylene polymerization is significantly lower than the standard CGC.2 Ethylene-bridged complex, [(5-Me4Cp)CH2CH2(NtBu)]TiCl2 was reported to show much reduced incorporation of comonomer. Herein, we present a novel preparation method for ortho-phenylene-bridged Cp/sulfonamido and Cp/amido titanium complexes. Conventionally, aryl-substituted cyclopentadienyl ligands have been prepared by nucleophilic attack of aryl lithium to 2-cyclopentenone derivatives and subsequent acid-catalyzed H2O-elimination. Attempts to prepare the targeted ortho-phenylene-bridged Cp/amide ligand system by the same strategy using 2-LiC6H4N(R)Li was unsuccessful. A new synthetic route was devised by using the Suzuki-coupling. The key starting material in this route, boronic acid 1 can be prepared in 30g-scale. The boronic acid is excellent substrates for the Suzuki-coupling reaction and the cyclopentenone compounds 2 are afforded in excellent yields. The cyclopentenone compounds can be easily transformed to the cyclopentadiene compounds 3 from which various ortho-phenylene-bridged Cp/sulfonamido and Cp/amido titanium complexes are prepared. Several complexes were characterized by X-ray crystallography and some of them show higher activity, higher incorporation of 1-octene, and higher molecular weights than the standard CGC [(5-Me4Cp)CH2CH2(NtBu)]TiCl2. | - |
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