Thiophene-NPN Ligand Supported Rare-Earth Metal Bis(alkyl) Complexes. Synthesis and Catalysis toward Highly trans-1,4 Selective Polymerization of Butadiene
文献类型：期刊论文
| 作者 | Wang, Dun1,2; Li, Shihui1,2; Liu, Xinli1; Gao, Wei1,3; Cui, Dongmei1 |
| 刊名 | ORGANOMETALLICS
 |
| 出版日期 | 2008-12-22 |
| 卷号 | 27期号:24页码:6531-6538 |
| ISSN号 | 0276-7333 |
| DOI | 10.1021/om800660j |
| 英文摘要 | A series of new rare-earth metal bis(alkyl) complexes [L(1-3)Ln(CH(2)SiMe(3))(2)(THF)(n)] (L(1) = MeC(4)H(2)SCH(2)NC(6)H(4)(Ph)(2)P=NC(6)H(2)Me(3)-2,4,6: Ln = Sc, n = 1 (1a); Ln = Lu, n = 1 (1b); L(2) = MeC(4)H(2)SCH(2)NC(6)H(4)(Ph)(2)P=NC(6)H(3)Et(2)-2,6: Ln = Sc, n = 1 (2a); Ln = Lu, n = 1 (2b); Ln = Y, n = 1 (2c); L(3) = MeC(4)H(2)SCH(2)NC(6)H(4)(Ph)(2)P=NC(6)H(3)(i)Pr(2)-2,6: Ln = Sc, n = 0 (3a)) and L(4)Sc(CH(2)SiMe(3))(2()THF) (4a) (L(4) = C(6)H(5)CH(2)NC(6)H(4)(Ph)(2)P=NC(6)H(3)Et(2)-2,6) have been prepared by reaction of rare-earth metal tris(alkyl)s with the corresponding HL(1-4) ligands via alkane elimination. Complexes 1a, 1b, 2a-2c, and 4a are monomeric with a coordinating THF molecule. Each metal ion is coordinated by a NPN ligand, two trans-located atkyl groups, and a THF molecule, forming a distorted trigonal-bipyramidal geometry. Complex 3a is THF-free, adopting a distorted tetrahedron geometry. In combination with AlR(3) and borate, these complexes have shown medium activity and good trans-1,4 selectivity for the polymerization of butadiene. The resultant polymer has moderate molecular weight (M(n) = 10 000- 18 000) with narrow molecular weight distribution (M(w)/M(n) < 1.6) and trans-1,4 regularity varying from 49.2% up to 91.3%. The catalyst performances are strongly dependent on the ortho substituent of the N-aryl ring and the presence of the thiophene moiety of the ligands and the type of aluminum alkyls and the lanthanide metal used. The scandium complex 2a displays the highest trans-1,4 selectivity. |
| 语种 | 英语 |
| WOS记录号 | WOS:000261510000023 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/64197]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Cui, Dongmei |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Jilin Univ, Dept Chem, Changchun 130023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Dun,Li, Shihui,Liu, Xinli,et al. Thiophene-NPN Ligand Supported Rare-Earth Metal Bis(alkyl) Complexes. Synthesis and Catalysis toward Highly trans-1,4 Selective Polymerization of Butadiene[J]. ORGANOMETALLICS,2008,27(24):6531-6538. |
| APA | Wang, Dun,Li, Shihui,Liu, Xinli,Gao, Wei,&Cui, Dongmei.(2008).Thiophene-NPN Ligand Supported Rare-Earth Metal Bis(alkyl) Complexes. Synthesis and Catalysis toward Highly trans-1,4 Selective Polymerization of Butadiene.ORGANOMETALLICS,27(24),6531-6538. |
| MLA | Wang, Dun,et al."Thiophene-NPN Ligand Supported Rare-Earth Metal Bis(alkyl) Complexes. Synthesis and Catalysis toward Highly trans-1,4 Selective Polymerization of Butadiene".ORGANOMETALLICS 27.24(2008):6531-6538. |
入库方式： OAI收割
来源：化学研究所
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