N,N'-[Oxybis(benzene-4,1-di-yl)]diacetamide

Area of Science:

• Crystallography
• Organic Chemistry
• Molecular Structure

Background:

• Understanding the three-dimensional arrangement of atoms in organic molecules is crucial for predicting their properties and reactivity.
• The specific conformational preferences of substituents on aromatic rings can significantly influence molecular packing and intermolecular interactions.

Purpose of the Study:

• To elucidate the detailed crystal structure of the title compound (C16H16N2O3).
• To analyze the conformational characteristics of the phenyl and acetamide groups within the crystal lattice.
• To investigate the intermolecular interactions, specifically hydrogen bonding, that dictate the solid-state structure.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
• Analysis of bond lengths, bond angles, dihedral angles, and intermolecular contacts was performed.
• Identification and analysis of hydrogen bonding networks and crystal packing motifs.

Main Results:

• The crystal structure reveals significant twisting between the phenyl groups (dihedral angle of 59.49°).
• The acetamide substituents exhibit distinct conformational differences, with C-C-N-C torsion angles of 21.0° and 76.4°.
• Intermolecular N-H⋯O hydrogen bonds link acetamide groups, forming characteristic ladder-like chains along the [101] direction.
• Disordered methyl group hydrogen atoms and crystal twinning were also observed.

Conclusions:

• The compound adopts a non-planar conformation due to the twisted phenyl rings.
• The observed hydrogen bonding pattern is a key factor in the formation of one-dimensional supramolecular chains.
• The structural findings provide insights into the solid-state behavior and potential intermolecular interactions of this class of organic compounds.