Some coordination compounds of cobalt(II) and manganese(II) and N,N-heterocyclic ligand phthalazine are described. Complexes were obtained by the interaction of o-phthalaldehyde (DF), isoniazid (INh) and Co(NCS)2·3H2O or Mn(CCl3COO)2 (1:2:1), are studied by elemental analysis and IR spectroscopy. The molecular structure of Mn(II) complex has been determined by single crystal X-ray diffracton analysis.
