3,4-Diamino-pyridinium hydrogen succinate

Area of Science:

• Crystallography
• Supramolecular Chemistry
• Organic Chemistry

Background:

• 3,4-diaminopyridine is a molecule with potential applications in various chemical fields.
• Succinic acid is a dicarboxylic acid commonly used in chemical synthesis and as a buffering agent.
• Understanding the solid-state structure of molecular salts is crucial for predicting their properties.

Purpose of the Study:

• To elucidate the crystal structure of the 3,4-diaminopyridine succinate salt.
• To identify and characterize the hydrogen bonding network within the crystal lattice.
• To understand the intermolecular interactions governing the stability of the salt.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
• Analysis of hydrogen bonding interactions (N-H···O, O-H···O, C-H···O) was performed.
• The protonation state of the 3,4-diaminopyridine molecule was confirmed.

Main Results:

• The crystal structure reveals a salt formed between protonated 3,4-diaminopyridine and a singly deprotonated succinate anion.
• The pyridine nitrogen atom of 3,4-diaminopyridine is protonated and acts as a hydrogen bond donor.
• Extensive hydrogen bonding, including N-H···O, O-H···O, and C-H···O interactions, stabilizes the crystal structure.

Conclusions:

• The crystal structure of 3,4-diaminopyridine succinate is characterized by a robust hydrogen bonding network.
• The specific arrangement of hydrogen bonds dictates the overall stability and packing of the crystal.
• This detailed structural information provides a foundation for further studies on the properties and potential applications of this compound.