Bis(triethano-lamine)nickel(II) sulfate.

Area of Science:

• Coordination Chemistry
• Crystal Engineering
• Supramolecular Chemistry

Background:

• Nickel(II) complexes are of interest due to their diverse coordination geometries and applications.
• Triethanolamine (TEA) is a versatile ligand capable of coordinating through nitrogen and oxygen atoms.
• Understanding supramolecular assembly in metal-organic compounds is crucial for materials science.

Purpose of the Study:

• To elucidate the crystal structure of the [Ni(triethanolamine)2]SO4 complex.
• To investigate the coordination modes of triethanolamine ligands.
• To characterize the supramolecular architecture formed by hydrogen bonding.

Main Methods:

• Single-crystal X-ray diffraction analysis was performed.
• The coordination environment around the Ni(II) center was determined.
• Hydrogen bonding interactions and network formation were analyzed.

Main Results:

• The crystal structure revealed two triethanolamine ligands coordinated to a central Ni(II) ion.
• Each TEA ligand coordinated via its nitrogen atom and two oxygen atoms, with the third hydroxyl group oriented outwards.
• Sulfate anions formed a 2D supramolecular network through hydrogen bonds with both coordinated and free hydroxyl groups.

Conclusions:

• The study successfully characterized a novel nickel(II)-triethanolamine sulfate complex.
• The coordination behavior of TEA and the formation of a 2D hydrogen-bonded network were confirmed.
• This work contributes to the understanding of crystal engineering in coordination compounds.