Four-coordinate nickel(II) and copper(II) complexes of 7-amino-4-methyl-5-aza-3-heptene-2-one (original) (raw)

Abstract

The condensation of acetylacetone with ethylenediamine yields 7-amino-4-methyl-5-aza-3-heptene-2-one (AEH). This terdentate (N20) Schiff base forms various types of ternary complexes, depending on the nature of the second ligand. Examples of five-and six-coordination have been previously reported. The present paper points to the possibility of preparing a less common type of complex, i.e. [Mn(AE)Py] ยง (M = Ni or Cu) in which the use of a monodentate ligand (pyridine) favours a square planar geometry.

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