MOLECULAR AND CRYSTAL STRUCTURE OF IRON(III) AND NICKEL(II) COMPLEXES WITH 1¢-PHTHALAZINYLHYDRAZONES OF HETEROCYCLIC CARBONYL COMPOUNDS
The structures of iron(III) and nickel(II) complexes with the composition [FeL <sub>2</sub>]Cl×H <sub>2</sub>O ( <b>1</b>) and [Ni(HL <sub>2</sub>')]×DMSO×0.5H <sub>2</sub>O ( <b>2</b>), where L and HL' are monodeprotonated residues of 1'-phthalazinylhydrazones of 2-acetyl benzimidazole and 1-phenyl-3-methyl-4-formyl-5-hydroxypyrazole respectively, are determined using single crystal X-ray diffraction analysis. Both compounds crystallize in the monoclinic symmetry. The Fe(III) and Ni(II) ions in the complexes have octahedral N <sub>6</sub> and N <sub>4</sub>O <sub>2</sub> donor environments respectively. Due to intermolecular hydrogen bonds, the molecules of the complexes form corrugated (complex <b>1</b>) and linear (complex <b>2</b>) molecular chains in the crystal.