Ethyl-enediaminium hemioxalate thio-cyanate

Area of Science:

• Crystallography
• Chemical Physics
• Materials Science

Background:

• Ethylenediamine derivatives are crucial in coordination chemistry and materials science.
• Understanding hydrogen bonding networks is key to predicting crystal structures and properties.
• Oxalate and thiocyanate anions offer diverse coordination possibilities.

Purpose of the Study:

• To elucidate the crystal structure of ethylenediaminium oxalate thiocyanate.
• To characterize the conformation of the ethylenediaminium dication.
• To investigate the hydrogen bonding interactions within the crystal lattice.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
• Analysis of N-C-C-N torsion angles characterized the dication's conformation.
• Intermolecular interactions, including hydrogen bonds (N-H⋯N, N-H⋯O, C-H⋯S), were identified.

Main Results:

• The ethylenediaminium dication adopts a (+)-synclinal conformation with a specific N-C-C-N torsion angle (62.64°).
• The oxalate dianion was found to be situated across an inversion center.
• A robust three-dimensional network was formed through extensive hydrogen bonding.

Conclusions:

• The crystal structure provides fundamental insights into the packing and interactions of organic cations with inorganic anions.
• The observed hydrogen bonding pattern dictates the overall network architecture.
• This structural information is vital for potential applications in crystal engineering and materials design.