| Lanthanide Complexes for Oligomerization of Phenyl Isocyanate |
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| 作者姓名： | 邓明宇 姚英明 周玉芳 张丽芬 沈琪 |
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| 作者单位： | Department of Chemistry and Chemical Engineering，Suzhou University，Suzhou，Jiangsu 215006，China，Department of Chemistry and Chemical Engineering，Suzhou University，Suzhou，Jiangsu 215006，China，Department of Chemistry and Chemical Engineering，Suzhou University，Suzhou，Jiangsu 215006，China，Department of Chemistry and Chemical Engineering，Suzhou University，Suzhou，Jiangsu 215006，China，Department of Chemistry and Chemical Engineering，Suzhou University，Suzhou，Jiangsu 215006，China |
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| 基金项目： | ProjectsupportedbytheNationalNaturalScienceFoundationofChina (Nos .2 9872 0 3 1and 2 9672 0 2 6) |
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| 摘 要： | IntroductionThestudyonthereactivitiesoflanthanidecomplexesto wardisocyanateshasattractedmuchattention .Ithasbeenre portedthatlanthanidealkoxides,1anddivalentdiaza pentadi enyllanthanidecomplexes2 canbeusedasthesinglecompo nentinitiatorsforisocyanatespolymerization .Recentlyourre searchgrouphasalsofoundthatlanthanoceneamide ,3diva lentaryloxideofsamarium4 ,5anddivalentsamarocene6 areallactivefortheoligomerizationofphenylisocyanate,andtheactivespeciesforthesethreesystemswereallsuccessfullyisolat…
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| 关 键 词： | 稀土 配合物 齐聚反应 苯基异氰酸盐 苯基异氰酸酯 催化活性 |
Lanthanide Complexes for Oligomerization of Phenyl Isocyanate |
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| Deng Ming‐Yu,Yao Ying‐Ming,Zhou Yu‐Fang,Zhang Li‐Fen,Shen Qi.Lanthanide Complexes for Oligomerization of Phenyl Isocyanate[J].Chinese Journal of Chemistry,2003,21(5):574-576. |
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| Authors: | Deng Ming‐Yu Yao Ying‐Ming Zhou Yu‐Fang Zhang Li‐Fen Shen Qi |
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| Abstract: | A series of lanthanide complexes including (Ind)3Sm(THF) (1), (MeCp)2Sm(μ‐SPh)(THF)]2(2), (MeCp)2Y(μ‐O‐i‐Pr)]2 (3), (MeCp)3Sm·θF (4), Sm(SPh)3(hmpa)3(5), (MeCp)2Y‐(μ‐OCH2CF3)]2(6) and (OF3CH2O)3 Y(THF)3 (7) were synthesized and they have good activity for the oligomerization of phenyl isocyanate. Among them 5 shows the highest activity. The conversion is as high as 96.2%, with 1/2500 of the molar ratio of cat./ PhNCO. The main components in oligomer were characterized to be a cyclodimer and a cyclotrimer. The ratio of cyclodimer to cyclotrimer depends on the lanthanide complexes used. 7 gave 85.2% cyclotrimer with 1/300 of the molar ratio of cat./PhNCO at 40 °C for 0.5 h, while 5 gave 77.6% cyclodimer with 1/300 of the molar ratio of cat./PhNCO at 40 °C for 4 h. |
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| Keywords: | phenyl isocyanate lanthanide complexes cyclotrimer cyclodimer oligomerization alkoxide |
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