...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Half-sandwich rhodium and iridium complexes containing homochiral imidazolyl-imine ligands: Synthesis, characterization and catalytic applications
【24h】

Half-sandwich rhodium and iridium complexes containing homochiral imidazolyl-imine ligands: Synthesis, characterization and catalytic applications

机译：含同手性咪唑基亚胺亚胺配体的半三明治铑和铱配合物：合成，表征和催化应用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Condensation of homochiral primary amines with 1-methyl-1H-imidazole-2- carbaldehyde affords the corresponding imidazolyl-imine compounds (L _1-L_3) which have been employed as ligands for the preparation of half-sandwich rhodium and iridium complexes of the formula [(η~5-C_5Me_5)MClL_n][SbF _6]. Treatment of these chloride compounds with AgSbF_6 renders dicationic aqua-complexes [(η~5-C_5Me _5)ML_n(H_2O)] [SbF_6]_2 which act as catalysts for the Diels-Alder reaction between methacrolein and cyclopentadiene. Catalysis occurs with good exo:endo selectivity and poor enantioselectivity. All the compounds have been completely characterized by analytical and spectroscopic methods. Characterization includes the molecular structure determination of the complexes [(η~5-C _5Me_5)MClL_n][SbF_6] (L_n = L_1, M = Rh, (1) Ir (4); L_n = L_3, M = Ir (6)) and [(η~5-C_5Me_5)ML_1(H _2O)][SbF_6]_2 (M = Rh (7), Ir (10)) using X-ray diffraction. From the stereochemical properties of the organometallic precursors the catalytic outcome is discussed.
机译：将同手性伯胺与1-甲基-1H-咪唑-2-甲醛缩合，得到相应的咪唑基-亚胺化合物（L _1-L_3），已将其用作配体，用于制备下式的半三明治铑和铱配合物[（η〜5-C_5Me_5）MClL_n] [SbF _6]。用AgSbF_6处理这些氯化物可得到呈水状的络合物[（η〜5-C_5Me _5）ML_n（H_2O）] [SbF_6] _2，它们可作为甲基丙烯醛和环戊二烯之间Diels-Alder反应的催化剂。催化反应具有良好的内外选择性和对映选择性差。所有化合物均已通过分析和光谱方法进行了完全鉴定。表征包括对配合物[（η〜5-C _5Me_5）MClL_n] [SbF_6]（L_n = L_1，M = Rh，（1）Ir（4）; L_n = L_3，M = Ir（6）的分子结构测定）和[（η〜5-C_5Me_5）ML_1（H _2O）] [SbF_6] _2（M = Rh（7），Ir（10））使用X射线衍射。从有机金属前体的立体化学性质讨论催化结果。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号