Pd(II) and Rh(I) chelate complexes of the bidentate phosphino–thiourea ligand PhNHC(S)NHCH2CH2PPh2: structural properties and activity in homogeneous and hybrid catalysis
作者:D Cauzzi
DOI:10.1016/s0022-328x(99)00615-4
日期:2000.1.15
functions, and its Pd(II) and Rh(I) complexes were prepared. Ptu behaves as a bidentate ligand forming seven-membered chelation rings in a boat-like conformation. In the case of palladium, this was ascertained by the X-ray determination of the structure of the complexes [Pd(Ptu)2]Cl2·6CHCl3 (1), [Pd(Ptu)2Cl]Cl·EtOH (2) and [Pd(Ptu)2][CoCl4].CHCl3·2EtOH (3). In complexes 1 and 3, the two ligands are related
制备了具有硫脲和膦功能的新型双功能配体PhNHC(S)NHCH 2 CH 2 PPh 2(Ptu),及其Pd(II)和Rh(I)配合物。Ptu表现为二齿配体,形成船形构象的七元螯合环。在钯的情况下,这是通过X射线确定配合物[Pd(Ptu)2 ] Cl 2 ·6CHCl 3(1),[Pd(Ptu)2 Cl] Cl·EtOH(2)和[Pd(Ptu)2 ] [CoCl 4 ] 。CHCl 3 •2EtOH(3)。在复杂在图1和图3中,两个配体是中心对称地相关的,而在图2中,它们以伞状排列被同一侧折叠。Rh(I)配合物[Rh(cod)(Ptu)] X(X = Cl或PF 6; cod = 1,5-环辛二烯)和[Rh(cod)(Ptu)] 2 [CoCl 4 ]的特征在于31 P-NMR和FT-IR光谱。在PD的均相氢化和加氢甲酰化反应的Rh(I)的催化活性(II)和复合物是依赖于反阴离子,作为在氯