Mixed complexes of nickel(II) with N-donor ligands

Abstract

High-spin mixed complexes of the type [Ni(dpt)(L)]X₂(where: L = ethylenediamine or propane-1,3-diamine; dpt = 1,5,9-triazanonane; X = Cl, Br, I, and ClO₄) and [Ni(dpt)(L)(NCS)](CNS) have been studied by i.r. and electronic spectroscopy and magnetic techniques. In these complexes the metal probably has a square-pyramidal stereochemistry with exception of the solid [Ni(dpt)(tn)]l₂ complex, which seems to have an intermediate configuration between trigonal bipyramidal and square pyramidal. The [Ni(dpt)(L)(NCS)](CNS) complexes have a high-spin six-co-ordinate stereochemistry.