Structure and stability of polyamine complexes. Crystal and molecular structures of bis[di-(3-aminopropyl) amine]nickel(II) perchlorate and bis[di(2-aminoethyl)amine]nickel(II) chloride monohydrate

Abstract

The crystal structures of bis[di-(3-aminopropyl)amine]nickel(II) perchlorate and of bis[di-(2-aminoethyl)amine]-nickel(II) chloride monohydrate have been determined by three-dimensional X-ray structure analysis. The ligand molecules co-ordinate in the equatorial planes of an octahedron and the cation geometry is close to C₂. The bond distances and angles and chelated ring conformation are discussed in relation to the relative stabilities of the complex cations.