Studies on nickel(II) and palladium(II) complexes with some tetraazamacrocycles containing tellurium

Abstract

The synthesis of 10-membered and 12-membered tellurium-containing tetraazamacrocyclic complexes of divalent nickel and palladium by template condensation of diaryltellurium dichlorides, (aryl = p-hydroxyphenyl, 4-hydroxy-3-methyl-phenyl, p-methoxyphenyl) with 1,2-diaminoethane and 1,3-diaminopropane in the presence of metal dichloride is reported. The resulting complexes were subjected to elemental analyses, magnetic measurements, and electronic absorption, infrared, and proton magnetic resonance spectral studies. The formation of the proposed macrocyclic skeletons and their donor sites were identified based on the spectral studies. A distorted octahedral structure for the nickel complexes and a square-planar structure for the palladium complexes in the solid state are suggested. © 2012 Copyright (CC) SCS.