| Item type |
デフォルトアイテムタイプ_（フル）(1) |
| 公開日 |
2023-03-18 |
| タイトル |
|
|
タイトル |
Stereospecific polymerization of propylene with group 4 ansa-fluorenylamidodimethyl complexes |
|
言語 |
en |
| 作成者 |
Nishii, Kei
Hagihara, Hideaki
Ikeda, Tomiki
Akita, Munetaka
Shiono, Takeshi
|
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 権利情報 |
|
|
権利情報 |
Copyright (c) 2005 Elsevier B.V |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Atactic |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Metallocene catalysts |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Polypropylene |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
Syndiotactic |
| 主題 |
|
|
主題Scheme |
NDC |
|
主題 |
430 |
| 内容記述 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
Group 4 [η1:η3-tert- butyl(dimethylfluorenylsilyl)amido]dimethyl complexes [t-BuNSiMe 2Flu]MMe2 (M = Ti, 1; Zr, 2; Hf, 3) were synthesized in a one-pot synthesis starting from the ligand, MeLi and MCl4 (M = Ti, Zr, Hf), respectively. The structures of these complexes were determined by X-ray crystallography and the results obtained revealed that the fluorenyl ligand coordinates to center metal in a η3-manner irrespective of center metal employed. Propylene polymerization was conducted at 0 or 20 °C in toluene by 1-3 combined with dried methylaluminoxane (MAO), which was prepared from the toluene solutions of MAO by removing free trialkylaluminiums, and HNMe2PhB(C6F5)4 in the presence of triisobutylaluminium. The 1-dried MAO system gave the polymer with syndiotactic triad (rr) of 63 0x1.e2fc8p-891t 0 °C, whereas 2 and 3 did not give any polymer in the same conditions. The 2-dried MAO system gave the polymer with the highest syndiotacticity (rr = 97%) at 20 °C, although the activity was low. The 3-dried MAO system did not give any polymer even at 20 °C. When HNMe2PhB(C6F5)4 was used in place of dried MAO at 20 °C, 1 gave almost atactic polymer, while 2 and 3 gave highly syndiotactic one (rr > 90%). These results indicate that the catalytic performance strongly depended on the center metal of the ansa- fluorenylamidodimethyl complexes as well as cocatalysts employed. |
| 出版者 |
|
|
出版者 |
Elsevier |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| 出版タイプ |
|
|
出版タイプ |
AO |
|
出版タイプResource |
http://purl.org/coar/version/c_b1a7d7d4d402bcce |
| 関連情報 |
|
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
10.1016/j.jorganchem.2005.08.027 |
| 関連情報 |
|
|
関連タイプ |
isVersionOf |
|
|
識別子タイプ |
DOI |
|
|
関連識別子 |
http://dx.doi.org/10.1016/j.jorganchem.2005.08.027 |
| 収録物識別子 |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0022-328X |
| 開始ページ |
|
|
開始ページ |
193 |
| 書誌情報 |
Journal of Organometallic Chemistry
Journal of Organometallic Chemistry
巻 691,
号 1-2,
p. 193-201,
発行日 2006-01
|
| 旧ID |
14676 |
JOrganometChem691_193.pdf (300.2 KB)
