Electrochemical studies of nickel complexes containing phoshprus(III) ligands and their related Ziegler catalysts
作者:A.A. Pozdeeva、U.M. Dzhemilev、N.R. Popod'ko、R.I. Khusnutdinov、S.I. Zhdanov、G.A. Tolstikov
DOI:10.1016/0022-328x(89)87220-1
日期:1989.5
with the ligand, thus changing the ligand's environment and configuration of the complex, the degree of alkylation and the degree of stabilization of the catalytically active complexes. In the case of the NiL42+ complexes, the ligand-to-metal charge transfer energies permitted the estimation of the affinity to the nickel electron inherent to the nickel LUMO energy level in the given complex, that energy
通过涉及汞电极,分光光度法和电导法的电化学方法获得的所有数据均表明,中性σ-供体-受体五配位NiX 2 -L 3和阳离子四配位NiL 4 2+的逐步形成与酸的转移有关。由于配位体中含有Ni二元系统的解决方案过度集中解离协调平衡II化合物配位酸配体(X =氯- ,无3 -,ACAC)和三价磷配位体(L = PBU 3,PPH 3,P(OEt)3,P(Oi-Pr)3,P(Os-Bu)3,P(OC 6 H 11),P(OPh 3)。首次为所研究的所有膦和亚磷酸酯制备了配合物。发现Ni(acac)2通过乙腈中的膦和亚磷酸酯增强配位作用。向负电位小的半波电位偏移值(ΔE 12,V)取决于金属内部配位球中存在的配体数量,对于NiX 2 L ,发现为200–300和800–1300 mV。2和NiL 4 2+。NiL 4 2+的电化学还原络合物可转变为零价镍同构络合物,其值类似于镍形式势Ni 2+ / Ni