Synthesis and characterization of zinc(II) and copper(II) complexes of embelin

Abstract

The synthesis and characterization of zinc(II) and copper(II) complexes of embelin (1), C17H26O4, are described. Zinc(II) and copper(II) ions reacted with (1) (an orange compound) in a 1:2 ratio to yield purple and green complexes, respectively. IR analysis of the two complexes showed that the metal ions were co-ordinated through the carbonyl and the hydroxyl oxygen atoms. Elemental analyses (AAS and C, H, N) of the complexes gave values that are consistent with six co-ordinate octahedral geometry about the metal ions. Molecular formulae, ZnC34H50N 2O14 and CuC34H54O10 for the zinc(II) and copper(II) complexes are proposed. © 2005 Chemical Society of Ethiopia.