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Related Experiment Videos

Two nickel complexes stabilized by nitrate counter-ions.

Eleonora Freire1, Sergio Baggio, Juan Carlos Muñoz

  • 1Universidad Nacional de la Patagonia, Sede Puerto Madryn, and CenPat, CONICET, 9120 Puerto Madryn, Chubut, Argentina.

Acta Crystallographica. Section C, Crystal Structure Communications
|April 5, 2002
PubMed
Summary

Two novel nickel nitrate compounds were synthesized and structurally characterized. These new nickel complexes exhibit octahedral coordination and are stabilized by hydrogen bonding.

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Area of Science:

  • Coordination Chemistry
  • Inorganic Chemistry
  • Crystallography

Background:

  • Nickel nitrates are important in coordination chemistry, with their structures influencing properties.
  • Phenanthroline and triazine ligands offer diverse coordination possibilities for metal ions.
  • Understanding hydrogen bonding is crucial for predicting and controlling crystal packing and stability.

Purpose of the Study:

  • To synthesize and characterize two new nickel nitrate complexes.
  • To elucidate the coordination environment and structural features of the novel compounds.
  • To investigate the role of hydrogen bonding in stabilizing the crystal structures.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the molecular and crystal structures.

Related Experiment Videos

  • Synthesis of nickel nitrate complexes with 3,4,7,8-tetramethyl-1,10-phenanthroline (tmp) and 2,4,6-tris(2-pyridyl)-1,3,5-triazine (tpt) ligands.
  • Analysis of coordination geometry and intermolecular interactions, particularly hydrogen bonding.

    • Main Results:

    • Two new nickel nitrate compounds were successfully synthesized and their structures determined: diaquabis(3,4,7,8-tetramethyl-1,10-phenanthroline)nickel(II) dinitrate methanol solvate and triaqua[2,4,6-tris(2-pyridyl)-1,3,5-triazine]nickel(II) dinitrate trihydrate.
    • In both compounds, the nickel(II) ion adopts an octahedral coordination geometry.
    • Extensive hydrogen-bonding networks involving coordinated water molecules and nitrate anions stabilize both crystal structures.

    Conclusions:

    • The study reports the successful synthesis and structural characterization of two novel nickel nitrate complexes.
    • The coordination environment around the nickel ion is octahedral, facilitated by bidentate phenanthroline and tridentate triazine ligands, along with water molecules.
    • Hydrogen bonding plays a significant role in the crystal lattice stabilization of these nickel nitrate compounds.