Four-coordinate Pd(II) complexes containing non-symmetric phosphorus ylides: Synthesis, characterization, and catalytic behavior towards Suzuki reaction
作者:Seyyed Javad Sabounchei、Mohammad Panahimehr、Mohsen Ahmadi、Zahra Nasri、Hamid Reza Khavasi
DOI:10.1016/j.jorganchem.2012.10.004
日期:2013.1
by, elemental analysis and spectroscopic methods. The structure of complex 1 has been characterized crystallographically. This structure consists of five-membered ring formed by coordination of the ligand through the phosphine group and the ylidic carbon atom to the metal center. The coordination geometry around the Pd atoms in this complex can be defined as slightly distorted square planar. At a supramolecular
本文报道了Ph 2 PCH 2 PPh 2 CH C(O)R] PdCl 2 }(R = 4'-联苯(1),OCH 2 Ph(2),由二氯(1,5-环辛二烯)钯(II)与相关的二氯苯酚反应制得的4-甲基苯基(3),2-萘基(4),2,4-二氯苯基(5),3-硝基苯基(6))在温和条件下在二氯甲烷中溶解磷。这些化合物已通过元素分析和光谱法表征。配合物1的结构在结晶学上已经表征。该结构由五元环组成,该五元环是通过配体通过膦基和碳原子基团与金属中心的配位而形成的。在该络合物中,Pd原子周围的配位几何可以定义为略微扭曲的正方形平面。在超分子水平,C – H⋯Cl和C – H⋯π的分子间相互作用是造成晶体堆积的原因。已发现该络合物可作为铃木交叉偶联反应的有效催化剂。在空气中,在0.2mol%的催化剂存在下,将各种芳基溴化物与芳基硼酸在DMF中在空气下偶联,以良好至优异的产率提供相应的交联产物。