摘要：

Acetylacetone bis -benzoylhydrazone (PhCONHN=CMe) 2 CH 2 (LH 2 ) and acetylacetone bis -isonicotinoylhydrazone (NC 5 H 4 CONHN=CMe) 2 CH 2 (L′H 2 ) complexes of the types [ML] and [ML′] (M = Co II , Ni II , Cu II or Zn II ) have been prepared and characterized. All the complexes are non-electrolytes and the cobalt(II) complexes are lowspin, the nickel(II) complexes are diamagnetic and the copper(II) complexes are paramagnetic. The ligands chelate via two C=N groups and two deprotonated enolate groups. The e.s.r. spectra of the copper(II) complexes indicate a tetragonally distorted dimeric structure. The X-ray diffraction parameters for [CoL] and [NiL′] correspond to a tetragonal crystal lattice.

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