Self-Assembly Reactions between the Cis<i>-</i>Protected Metal Corners (N−N)M<sup>II</sup> (N−N = Ethylenediamine, 4,4‘-Substituted 2,2‘-Bipyridine; M = Pd, Pt) and the Fluorinated Edge 1,4-Bis(4-pyridyl)tetrafluorobenzene
作者:Montserrat Ferrer、Albert Gutiérrez、Mounia Mounir、Oriol Rossell、Eliseo Ruiz、Alexander Rang、Marianne Engeser
DOI:10.1021/ic062373s
日期:2007.4.1
nitrogen-protected palladium(II) and platinum(II) complexes have been investigated. While dynamic equilibria between molecular triangles and squares were observed when the diimine compounds 4,4'-R2bipy (bipy = 2,2'-bipyridine; R = H, Me, t-Bu) were employed as ancillary ligands, only square species were obtained from ethylenediamine (en) derivatives. Characterization of the obtained metallomacrocycles was accomplished
研究了氟化的对位配体1,4-双(4-吡啶基)四氟苯(A)与不同的氮保护钯(II)和铂(II)配合物之间的自组装反应。当使用二亚胺化合物4,4'-R2bipy(bipy = 2,2'-联吡啶; R = H,Me,t-Bu)作为辅助配体时,观察到分子三角形和正方形之间的动态平衡。从乙二胺(en)衍生物获得。通过1H和19F NMR光谱结合电喷雾电离傅立叶变换离子回旋共振质谱(ESI-FT-ICR)对获得的金属大环化合物进行表征。已经执行了分子动力学模拟(UFF)来解释氟化环对方形/三角形相对稳定性的影响。使用GIAO方法的密度函数计算已用于解释化学位移分配。对这些化合物充当富电子芳族客体的主体的能力的研究表明,乙二胺钯方剂能够仅在水性介质中建立这种类型的分子间相互作用。主客体的化学计量和缔合常数已通过1 H NMR光谱法确定。