Bis(2,3-diamino-pyridinium) succinate trihydrate

Area of Science:

• Crystallography
• Supramolecular Chemistry
• Materials Science

Background:

• Understanding the crystal structure of organic salts is crucial for predicting their physical and chemical properties.
• 2,3-diaminopyridine derivatives are of interest due to their potential applications in various fields.
• Succinate anions are common components in organic salts, influencing crystal packing and stability.

Purpose of the Study:

• To elucidate the crystal structure of the title salt, 2,3-diaminopyridinium succinate trihydrate.
• To investigate the intermolecular interactions, including hydrogen bonding, within the crystal lattice.
• To characterize the role of water molecules in the crystal structure and their potential disorder.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the crystal structure.
• The asymmetric unit was analyzed to identify the protonated cation, succinate anion, and water molecules.
• Hydrogen bonding networks and potential disorder in water molecules were investigated.

Main Results:

• The crystal structure consists of protonated 2,3-diaminopyridinium cations, succinate dianions, and water molecules.
• A specific hydrogen bonding motif (R(2)(2)(8)) was observed between the cation and anion.
• One water molecule exhibits positional disorder, while another has a partial occupancy.

Conclusions:

• The crystal structure of 2,3-diaminopyridinium succinate trihydrate has been successfully determined.
• The identified hydrogen bonding interactions play a significant role in stabilizing the crystal structure.
• The observed disorder in water molecules provides insights into the dynamic nature of the crystal lattice.