Nickel(II) Complex with a Flexidentate Ligand Derived from Acetohydrazide: Synthesis, Structural Characterization and...

Area of Science:

• Coordination Chemistry
• Inorganic Synthesis
• Crystallography

Background:

• Nickel(II) complexes are crucial in catalysis and materials science.
• Understanding ligand behavior in metal complex formation is key.
• Pyrazole ligands offer versatile coordination modes.

Purpose of the Study:

• To synthesize and characterize a novel mononuclear Nickel(II) complex.
• To elucidate the coordination environment and geometry of the Nickel(II) center.
• To investigate intermolecular interactions within the crystal structure.

Main Methods:

• Synthesis of the Nickel(II) complex via reaction of a pyrazole precursor with NiCl2·6H2O.
• Structure determination using single-crystal X-ray crystallography.
• Analysis of intermolecular contacts using Hirshfeld surface analysis.

Main Results:

• Formation of the mononuclear complex [Ni(Lp)2(CH3OH)2]Cl2.
• The Ni(II) ion exhibits a six-coordinate, distorted octahedral geometry.
• Pyrazole ligands act as bidentate neutral ligands.
• Hirshfeld surface analysis identified H/H and Cl/H as dominant intermolecular interactions.

Conclusions:

• The study successfully synthesized and structurally characterized a novel Nickel(II) complex.
• The coordination chemistry and crystal packing of the complex were elucidated.
• Hirshfeld surface analysis provided insights into the nature of intermolecular forces governing crystal structure.