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Related Experiment Videos

Hexaaquanickel(II) bis(hypophosphite).

Natalia V Kuratieva1, Marina I Naumova, Dmitry Yu Naumov

  • 1Institute of Inorganic Chemistry, SB Russian Academy of Sciences, Academition Lavrentiev Avenue 3, Novosibirsk 90, 630090 Russia. n.v.kuratieva@mill.solid.nsc.ru

Acta Crystallographica. Section C, Crystal Structure Communications
|December 31, 2002
PubMed
Summary

The crystal structure of hexaaquanickel(II) bis(hypophosphite) was determined, revealing a pseudo-face-centered cubic cell for nickel(II) cations. This structure shares atomic packing similarities with related cobalt and mixed cobalt-nickel compounds.

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Area of Science:

  • Inorganic Chemistry
  • Crystallography
  • Coordination Chemistry

Background:

  • Hexaaquanickel(II) bis(hypophosphite) is a coordination compound with potential applications in materials science.
  • Understanding the crystal structure of such compounds is crucial for predicting their physical and chemical properties.
  • Previous studies have investigated related cobalt and mixed cobalt-nickel analogues, providing a basis for comparison.

Purpose of the Study:

  • To determine the precise crystal structure of hexaaquanickel(II) bis(hypophosphite), [Ni(H(2)O)(6)](H(2)PO(2))(2).
  • To compare the atomic packing and coordination environment with previously studied isostructural or similar compounds.
  • To elucidate the geometric characteristics of the hypophosphite anion and its interactions within the crystal lattice.

Main Methods:

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  • Single-crystal X-ray diffraction was employed to determine the atomic arrangement.
  • Analysis of crystallographic data, including cell parameters and atomic positions.
  • Identification of coordination spheres, symmetry elements, and intermolecular interactions (hydrogen bonding).

Main Results:

  • The crystal structure of [Ni(H(2)O)(6)](H(2)PO(2))(2) was successfully determined, exhibiting prismatic crystals.
  • The packing of nickel (Ni) and phosphorus (P) atoms mirrors that found in [Co(H(2)O)(6)](H(2)PO(2))(2) and [Co(0.5)Ni(0.5)(H(2)O)(6)](H(2)PO(2))(2).
  • Ni(II) cations adopt a pseudo-face-centered cubic arrangement with a cell parameter of approximately 10.216 Å, featuring tetrahedral cavities occupied by P atoms. The Ni(II) cation exhibits twofold symmetry with an octahedral coordination of six water molecules, and hypophosphite anions are hydrogen-bonded to these water molecules.

Conclusions:

  • The crystal structure of hexaaquanickel(II) bis(hypophosphite) is confirmed and characterized.
  • The observed structural similarity in atomic packing highlights a common motif in these related metal hypophosphite complexes.
  • The study provides detailed insights into the coordination geometry of Ni(II) and the hydrogen bonding network involving hypophosphite anions.