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Diammonium diaqua-bis(methyl-enediphospho-nato-κO,O')cobaltate(II)
K A Van der Merwe1, Hendrik G Visser, J A Venter
1Department of Chemistry, University of the Free State, PO Box 339, Bloemfontein, 9330, South Africa.
Summary
This study details the crystal structure of a cobalt(II) salt featuring methyl-ene-diphospho-nate ligands. The research highlights the formation of a 3D network through hydrogen bonding interactions.
Area of Science:
- Inorganic Chemistry
- Crystal Engineering
- Coordination Chemistry
Background:
- Methyl-ene-diphospho-nate ligands are versatile in coordination chemistry.
- Cobalt(II) complexes exhibit diverse coordination geometries.
- Hydrogen bonding plays a crucial role in crystal lattice formation.
Purpose of the Study:
- To elucidate the crystal structure of the ammonium cobalt(II) methyl-ene-diphospho-nate salt.
- To investigate the coordination behavior of the methyl-ene-diphospho-nate ligand with Cobalt(II).
- To analyze the hydrogen bonding network within the crystal structure.
Main Methods:
- Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
- Coordination geometry around the Cobalt(II) ion was analyzed.
- Hydrogen bonding interactions (O-H⋯O and N-H⋯O) were identified and characterized.
Main Results:
- The salt (NH(4))(2)[Co(CH(4)O(6)P(2))(2)(H(2)O)(2)] was synthesized and characterized.
- The methyl-ene-diphospho-nate ligand acts as a bidentate ligand, coordinating through oxygen atoms.
- The Cobalt(II) ion adopts an octahedral CoO(6) coordination geometry.
- A 3D network is formed via O-H⋯O and N-H⋯O hydrogen bonds between ammonium cations and cobalt-diphosphonate anions.
Conclusions:
- The bidentate coordination of methyl-ene-diphospho-nate and octahedral Co(II) geometry are confirmed.
- The crystal structure is stabilized by an extensive hydrogen bond network.
- This study contributes to understanding the supramolecular assembly of metal-organic compounds.
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