Ethylxanthates and isopropylxanthates of nickel with triphenylphosphine as mixed π-acceptor ligand
作者:Richard Pastorek、Zdenĕk Trávníc̆ek、Zdenĕk S̆indelár̆、Roman Klic̆ka、Frantis̆ek Br̆ezina、Jaromír Marek
DOI:10.1016/0277-5387(94)00433-f
日期:1995.6
Nickel(II)xanthates with triphenylphosphine as mixed pi-acceptor ligand of the composition [NiX(RXa)(PPh(3))] (X = Cl, Pr, I, NCS; R = Et, i-Pr; Xa = S2CO- have been prepared. All of these complexes have been characterized by elemental analysis, infrared and electronic absorption spectroscopy, magnetochemical measurements, thermal analysis and conductivity measurements. The [NiI(RXa)(PPh(3))] complexes have been one-electron irreversibly oxidized which was determined by cyclic voltammetry. A distorted square-planar arrangement of the coordination sphere with chromophore NiS2ClP has been proved by the X-ray structural analysis of the model [NiCl(i-PrXa)(PPh(3))] complex.
Effect of diverse solvents on the composition and structure of mixed-ligand nickel(II) dithiocarbamates: [NiX(ndtc)(PPh3)]
and by single-crystal X-ray analysis (for complex 1). The solution behaviour study of selected representatives (1, 4, 5 and 8) in various solvents (acetone, acetonitrile, methanol (MeOH), N,N′-dimethylformamide (DMF), chloroform, nitromethane, dimethylsulfoxide (DMSO), MeOH/water mixture (1:1 v/v)) by a combination of NMR and UV–Vis spectroscopy, mass spectrometry and single-crystal X-ray analysis
摘要一系列由[NiX(ndtc)(PPh3)]组成的方形平面镍(II)苄基哌嗪-二硫代氨基甲酸酯(bpdtc; 1-4)和硫吗啉-二硫代氨基甲酸酯(tmdtc; 5-8)配合物(X表示Cl为Cl 1和5,制备2和6的Br,3和7的I,4和8的NCS),并通过元素分析,UV-Vis,IR和NMR光谱,质谱,摩尔电导率和磁化学测量进行彻底表征,并通过单晶X射线分析(对于配合物1)。选定代表(1、4、5和8)在各种溶剂(丙酮,乙腈,甲醇(MeOH),N,N'-二甲基甲酰胺(DMF),氯仿,硝基甲烷,二甲基亚砜(DMSO),甲醇中的溶液行为研究/水混合物(1:1 v / v))结合使用NMR和UV-Vis光谱,
Correlation between crystal symmetry and the splitting of d orbital in the thiocyanate nickel(II) complexes
作者:J.G. Małecki、A. Świtlicka、T. Groń、M. Bałanda
DOI:10.1016/j.poly.2010.08.030
日期:2010.11
ligands of complexes (1) and (3) were indicated as rather strong π-acceptors while that of complex (4) one has some π-donor properties. When the aliphatic chain (CH2) elongates in the sequence: (1), (3) and (4), an increase in the orbital contribution to the magnetic moment and a decrease in the 10Dq value of the dorbital splitting are related to the change of the point group symmetry from D2h, via