Some metal-ion complexes with ligands formed by reaction of amines with aliphatic carbonyl compounds. Part I. Nickel(II) and copper(II) complexes formed by the diaminoethane–acetone reaction

Abstract

Reaction of acetone with bis(diaminoethane)nickel(II) yields the bis-complex of the β-amino-ketone NH₂CH₂CH₂NHC(CH₃)₂CH₂COCH₃, which acts as tridentate ligand. With bis(diaminoethane)copper(II), the complex of the linear pentadentate ligand NH₂CH₂CH₂NHC(CH₃)₂CH₂C(CH₃):NCH₂CH₂NHC(CH₃)₂CH₂COCH₃ is formed. Observations on the reaction between the tris(diaminoethane) complexes and acetone, which yield isomeric macrocyclic complexes, and on the reaction between diaminoethane and acetone are reported.