| 886578-35-4

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 咪唑并嘧啶类
• CAS: 886578-35-4
• 化学式: C₁₃H₂₀I₂N₄Pd
• 分子量: 592.558
• InChiKey: XVPYBPJFFAQYIE-UHFFFAOYSA-L

反应信息

• 作为反应物：
  描述：

  以 乙腈 为溶剂， 生成 (1,1’-di(i-Pr)-3,3’-methylenediimidazolin-2,2’-diylidene)palladium dibromide
  参考文献：
  名称：

  Synthesis and structural analysis of palladium biscarbene complexes derived from bisimidazolium ligand precursors

  摘要：

  The palladation of potentially chelating bisimidazolium ligand precursors with palladium acetate gives bridging bimetallic, chelating monometallic, and homoleptic tetracarbene complexes. The coordination mode of the biscarbene ligand has been identified by spectroscopic analysis and crystallographic characterization of representative complexes, including the first example of a biscarbene A-frame structure. Substantial concentrations of free acetate favor the formation of tetracarbene over biscarbene palladium complexes, while in the absence of a base, the concentration of reactants influences the selectivity for bridging bimetallic versus chelating monometallic species. Preliminary kinetic and mechanistic studies indicate that chelating biscarbene palladium acetate complexes are intermediates in the formation of the homoleptic tetracarbene complexes. Probably due to the high trans effect of the biscarbene ligand, such complexes are more efficient palladating agents for bisimidazolium salts than palladium acetate. (c) 2005 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.ica.2005.10.045
• 作为产物：
  描述：

  palladium diacetate 、 1,1'-di-isopropyl-3,3'-methylene-diimidazolium diiodide 以 二甲基亚砜 为溶剂， 以77%的产率得到
  参考文献：
  名称：

  Synthesis and structural analysis of palladium biscarbene complexes derived from bisimidazolium ligand precursors

  摘要：

  The palladation of potentially chelating bisimidazolium ligand precursors with palladium acetate gives bridging bimetallic, chelating monometallic, and homoleptic tetracarbene complexes. The coordination mode of the biscarbene ligand has been identified by spectroscopic analysis and crystallographic characterization of representative complexes, including the first example of a biscarbene A-frame structure. Substantial concentrations of free acetate favor the formation of tetracarbene over biscarbene palladium complexes, while in the absence of a base, the concentration of reactants influences the selectivity for bridging bimetallic versus chelating monometallic species. Preliminary kinetic and mechanistic studies indicate that chelating biscarbene palladium acetate complexes are intermediates in the formation of the homoleptic tetracarbene complexes. Probably due to the high trans effect of the biscarbene ligand, such complexes are more efficient palladating agents for bisimidazolium salts than palladium acetate. (c) 2005 Elsevier B.V. All rights reserved.

  DOI：

  10.1016/j.ica.2005.10.045