ETHYLXANTHATES AND ISOPROPYLXANTHATES OF NICKEL WITH TRIPHENYLPHOSPHINE AS MIXED PI-ACCEPTOR LIGAND

摘要

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. [References: 22]