Syntheses and crystal structures of three [(acac)(TMEDA)] complexes ( = Mn, Fe and Zn).

The complexes bis-(acetyl-acetonato-κ ,')(,,','-tetra-methyl-ethylenedi-amine-κ ,')manganese(II), [Mn(CHO)(CHN)], bis-(acetyl-acetonato-κ ,')(,,','-tetra-methyl-ethylenedi-amine-κ ,')iron(II), [Fe(CHO)(CHN)], and bis-(acetyl-acetonato-κ ,')(,,','-tetra-methyl-ethylenedi-amine-κ ,')zinc(II), [Zn(CHO)(CHN)], were synthesized from the reaction of the corresponding metal acetyl-acetonates [(acac)(HO)] with ,,','-tetra-methyl-ethylenedi-amine (TMEDA) in toluene. Each of the complexes displays a central metal atom which is nearly octa-hedrally surrounded by two chelating acac and one chelating TMEDA ligand, resulting in an NO coordination set. Despite the chemical similarity of the complex units, the packing patterns for compounds - are different and thus the crystal structures are not isotypic.