Hydrogen bonding and pi-pi stacking in 6-hydroxybiochanin A monohydrate

Area of Science:

• Crystallography
• Supramolecular Chemistry
• Organic Chemistry

Background:

• Isoflavones are a class of compounds with diverse biological activities.
• Understanding the crystal packing of organic molecules is crucial for predicting their properties.

Purpose of the Study:

• To elucidate the crystal structure and intermolecular interactions of 5,6,7-trihydroxy-4 '-methoxyisoflavone monohydrate.
• To describe the self-assembly of isoflavone molecules in the solid state.

Main Methods:

• Single-crystal X-ray diffraction analysis.
• Analysis of hydrogen bonding and other non-covalent interactions.

Main Results:

• The crystal structure of 5,6,7-trihydroxy-4 '-methoxyisoflavone monohydrate (C16H12O6.H2O) was determined.
• Isoflavone molecules are organized into chains via R(4)3(17) motifs involving O-H...O and C-H...O hydrogen bonds.
• Chains are further assembled into sheets by centrosymmetric R(4)2(14) motifs.
• A three-dimensional network is formed through hydrogen bonding and aromatic pi-pi stacking interactions.

Conclusions:

• The study provides detailed insights into the supramolecular architecture of this isoflavone derivative.
• The observed network structure is a result of specific hydrogen bonding patterns and pi-pi stacking.
• This structural information can be valuable for the design of novel materials and understanding structure-property relationships.