3-Meth-oxy-2-[(E)-(4-meth-oxy-phen-yl)imino-meth-yl]phenol

Area of Science:

• Organic Chemistry
• Crystallography
• Molecular Structure

Background:

• Understanding tautomerism is crucial in organic chemistry.
• Molecular conformation dictates chemical properties and interactions.
• Crystal packing influences bulk material properties.

Purpose of the Study:

• To determine the tautomeric form of the title compound, C(15)H(15)NO(3).
• To analyze the molecular geometry and conformation.
• To investigate intermolecular interactions in the crystalline state.

Main Methods:

• Single-crystal X-ray diffraction was employed to elucidate the structure.
• Analysis of bond lengths, angles, and dihedral angles.
• Identification of hydrogen bonding and other non-covalent interactions.

Main Results:

• The compound exists in the enol-imine tautomeric form.
• A significant dihedral angle of 44.08° between the two rings was observed.
• An intramolecular O-H⋯N hydrogen bond was identified, contributing to the near-planarity of a key functional group.
• Intermolecular C-H⋯O hydrogen bonds and C-H⋯π interactions were found to form sheet-like structures in the crystal.

Conclusions:

• The enol-imine tautomer is the predominant form in the solid state.
• The observed molecular conformation is stabilized by intramolecular hydrogen bonding.
• Crystal packing is governed by a combination of hydrogen bonds and weaker C-H⋯π interactions.