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, ZnC₃₄H₅₀N₂O₁₄ and CuC₃₄H₅₄O₁₀ for the zinc(II) and copper(II) complexes are proposed.



KEY WORDS: Zinc(II) complex, Copper(II) complex, Embelin


Bull. Chem. Soc. Ethiop. 2005, 19(2), 295-299.