Syntheses and crystal structures of three [M(acac)2(TMEDA)] complexes (M = Mn, Fe and Zn).

The complexes bis-(acetyl-acetonato-κ2 O,O')(N,N,N',N'-tetra-methyl-ethylenedi-amine-κ2 N,N')manganese(II), [Mn(C5H7O2)2(C6H16N2)], bis-(acetyl-acetonato-κ2 O,O')(N,N,N',N'-tetra-methyl-ethylenedi-amine-κ2 N,N')iron(II), [Fe(C5H7O2)2(C6H16N2)], and bis-(acetyl-acetonato-κ2 O,O')(N,N,N',N'-tetra-methyl-ethylenedi-amine-κ2 N,N')zinc(II), [Zn(C5H7O2)2(C6H16N2)], were synthesized from the reaction of the corresponding metal acetyl-acetonates [M(acac)2(H2O)2] with N,N,N',N'-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 N2O4 coordination set. Despite the chemical similarity of the complex units, the packing patterns for compounds 1-3 are different and thus the crystal structures are not isotypic.