Caffeine-N-phthaloyl-β-alanine (1/1)

Area of Science:

• Crystallography
• Materials Science
• Supramolecular Chemistry

Background:

• Co-crystals are crystalline solids composed of two or more different molecules in a defined stoichiometric ratio.
• Caffeine, a widely consumed stimulant, and N-phthaloyl-β-alanine are molecules with potential for co-crystal formation due to their functional groups.

Purpose of the Study:

• To synthesize and characterize a novel co-crystal of N-phthaloyl-β-alanine and caffeine.
• To elucidate the crystal structure and intermolecular interactions within this co-crystal.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
• Analysis of intermolecular interactions, including hydrogen bonding and van der Waals forces, was performed.

Main Results:

• A 1:1 co-crystal of N-phthaloyl-β-alanine and caffeine was successfully synthesized and characterized.
• The crystal structure exhibits planar phthalimide and purine rings, with molecules linked by an O-H⋯N hydrogen bond.
• C-H⋯O interactions further stabilize the crystal lattice, and caffeine methyl groups show disorder.

Conclusions:

• The formation of the N-phthaloyl-β-alanine-caffeine co-crystal is driven by specific hydrogen bonding and other intermolecular forces.
• Understanding these interactions is crucial for designing new co-crystals with tailored properties.