Oxalsäurederivate durch oxidative kupplung von kohlenmonoxid an nickel
作者:Heinz Hoberg、F. Javier Fañanás、Hans Josef RiegeI
DOI:10.1016/s0022-328x(00)99113-7
日期:1983.9
Carbon monoxide is oxidatively coupled by ligand nickel(II) compounds with secondary, primary amines and with alkali alkoxides to give oxalic acid derivatives. In the case of secondary amines the CO coupling can be run catalytically by adding oxidants like copper(II) salts. The yield of oxalic esters depends on the types of ligands and anions.
Complexes have been prepared between pyridine, α-, β- and γ-picoline, 2,6-lutidine, and s-collidine and nickel (II) chloride, bromide, and iodide. The thermaldecomposition of these complexes has been studied. Diffuse reflectance spectra have been measured for all complexes and have been used to determine the environment about the nickel atoms.