2-Cyano-quinolin-1-ium hydrogen sulfate

Area of Science:

• Crystallography
• Supramolecular Chemistry
• Organic Chemistry

Background:

• 2-cyano-quinoline is a heterocyclic aromatic organic compound.
• Sulfuric acid is a strong mineral acid.
• Proton transfer reactions are fundamental in acid-base chemistry.

Purpose of the Study:

• To synthesize and characterize the title salt formed from 2-cyano-quinoline and sulfuric acid.
• To investigate the crystal structure and intermolecular interactions of the title salt.

Main Methods:

• Crystallization of 2-cyano-quinoline with sulfuric acid.
• X-ray diffraction analysis to determine the crystal structure.
• Analysis of hydrogen bonding networks.

Main Results:

• The title salt, C(10)H(7)N(2) (+)·HSO(4) (-), was successfully formed via proton transfer.
• The quinoline ring system exhibits near planarity.
• A layered network structure was observed, stabilized by N-H⋯O, O-H⋯O, and C-H⋯O hydrogen bonds between cations and anions.

Conclusions:

• The crystallization process leads to the formation of a well-defined salt structure.
• Hydrogen bonding plays a crucial role in organizing the crystal lattice.
• The study provides insights into the solid-state behavior of 2-cyano-quinoline in the presence of a strong acid.