Characterization of σ and π Donation of Solvents by ^31P NMR Chemical Shifts of Trigonal-Bipyramidal Palladium(II) Complexes with Tris(2-diphenylphosphinoethyl)phosphine
Characterization of σ and π Donation of Solvents by ^31P NMR Chemical Shifts of Trigonal-Bipyramidal Palladium(II) Complexes with Tris(2-diphenylphosphinoethyl)phosphine
复制标题
通过 ^31P NMR 表征溶剂的 σ 和 π 供体 三方双锥钯 (II) 配合物与三(2-二苯基膦乙基)膦的化学位移
DOI：
10.2116/analsci.12.27
复制
发表时间：
1996
期刊：
影响因子：
--
通讯作者：
S. Funahashi
中科院分区：
文献类型：
--
作者：
S. Aizawa;S. Funahashi
~(31)P核磁共振谱证实了三(2-二苯基膦乙基)膦(Pp_3)与一个溶剂分子[Pd(Pp_3)(溶剂)]^2+(溶剂=乙腈、吡啶、二甲基亚砜、N，N-二甲基甲酰胺、三甲基亚磷酸酯)形成了三方双锥钯(II)络合物。在这些配合物中，PP_3配体中的中心磷原子与溶剂分子在轴向配位，而PP_3配体中的末端磷原子在赤道平面上。轴向和赤道磷原子的~(31)P核磁共振化学位移对轴向配位的溶剂非常敏感。用~(31)P核磁共振化学位移表征了溶剂的σ和π捐献。
The formation of the trigonal-bipyramidal palladium(II) complexes with tris(2-diphenylphosphinoethyl)phosphine (pp_3) and one solvent molecule, [Pd(pp_3)(solvent)]^2+ (solvent=acetonitrile, pyridine, dimethyl sulfoxide, N,N -dimethyl-formamide, trimethylphosphite), is confirmed by the ^31P NMR spectroscopy. In these complexes, the central phosphorus atom in the pp_3 ligand and the solvent molecule are coordinated in the axial position, and the terminal phosphorus atoms in the pp_3 ligand are in the equatorial plane. The ^31P NMR chemical shifts of the axial and equatorial phosphorus atoms are quite sensitive to the axially coordinated solvent. The σ and π donations of the solvents were characterized by using the ^31P NMR chemical shifts.