N,N'-Bis(8-quinol-yl)pyridine-2,6-dicarboxamide

Area of Science:

• Organic Chemistry
• Crystallography
• Molecular Structure

Background:

• Understanding the three-dimensional arrangement of atoms in organic molecules is crucial for predicting their properties and reactivity.
• Quinolyl and pyridyl systems are common scaffolds in medicinal chemistry and materials science.

Purpose of the Study:

• To elucidate the precise molecular geometry and intermolecular interactions of the title compound, C(25)H(17)N(5)O(2).
• To investigate the conformational preferences dictated by the relative orientation of the quinolyl and pyridyl ring systems.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the molecular structure.
• Analysis of dihedral angles and hydrogen bonding patterns provided insights into the molecule's conformation.

Main Results:

• The pyridyl ring exhibits distinct dihedral angles (8.90(3)° and 28.67(4)°) relative to the two quinolyl ring systems.
• Intramolecular N-H⋯N hydrogen bonds were identified, leading to the formation of four planar five-membered rings.
• Two of these five-membered rings are nearly coplanar with the adjacent quinolyl ring systems, indicating significant intra-molecular stabilization.

Conclusions:

• The crystal structure of C(25)H(17)N(5)O(2) reveals a specific non-planar conformation driven by steric and electronic factors.
• The observed hydrogen bonding network plays a key role in defining the molecule's overall architecture and rigidity.