| 氮杂环卡宾银碘化物[Ag(MEIm)2]+[AgI2]-的合成、结构与催化性能(MEIm=1-methyl-3-ethyl-imidazolyl)(英文) |
| Synthesis, Crystal Structure and Catalytic Behavior of Linear N-heterocyclic Carbene Silver [Ag(MEIm)2]+[AgI2]- (MEIm=1-methyl-3-ethyl-imidazolyl) |
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| 摘要: 常温下(MEIm)+I-(MEIm=1-methyl-3-ethyl-imidazolyl)与Ag2O按照物质的量比为1∶2在DMSO中反应成功的合成了线型氮杂环卡宾银碘化物[Ag(MEIm)2]+[AgI2]-，化合物通过了元素分析，1H NMR，X-ray 衍射表征。配合物属于单斜晶系，空间群为C2/m，a=1.592 5(4) nm，b=0.679 07(14) nm，c=0.927 1(2) nm，β=110.247(5)°，V=0.940 7(4) nm3，Mr=689.86，Z=8，Dc=2.436 g·cm-3，μ(Mo Kα)=5.36 mm-1，F(000)=640，R=0.036，wR=0.105。配合物由阴阳离子对构成，配阳离子中2个卡宾碳原子与银原子呈线型结构。目标化合物对L-lactide的聚合具有高的催化活性。 |
| 关键词: 氮杂环 卡宾 银 晶体结构 催化性能 |
| 基金项目: |
| Abstract: The title complex [Ag(MEIm)2]+[AgI2]- (MEIm=1-methyl-3-ethyl-imidazolyl) has been synthesized by the reaction of Ag2O with (MEIm)+I- in a 1∶2 molar ratio at room temperature in DMSO, and characterized by elemental analysis, 1H NMR and single-crystal X-ray diffraction analysis. It crystallizes in monoclinic system, space group C2/m with a=1.592 5(4) nm, b=0.679 07(14) nm, c=0.927 1(2) nm, β=110.247(5)°, V=0.940 7(4) nm3, Mr=689.86, Z=8, Dc=2.436 g·cm-3, μ(Mo Kα)=5.36 mm-1 and F(000)=640. The structure was refined to R=0.036 6 and wR=0.142 6 for 728 observed reflections with I>2σ(I). The cation has a typical linear conformation of [Ag(carbine)2]+ with a C-Ag-C angle of 180°. The catalytic behavior of the title complex has been investigated, the results indicate the title complex has a highly catalytic activation for L-lactide polymerization. CCDC: 843657. |
| Keywords: N-heterocyclic carbene carbene silver crystal structure catalytic behavior |
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| 王志国,边清泉,黄宝美,邓 毅,刘思曼.氮杂环卡宾银碘化物[Ag(MEIm)2]+[AgI2]-的合成、结构与催化性能(MEIm=1-methyl-3-ethyl-imidazolyl)(英文)[J].无机化学学报,2012,28(1):191-194. |
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