3-(4-Acetylphenyl)-1-(4-nitrophenyl)triazene

Area of Science:

• Crystallography
• Organic Chemistry
• Molecular Structure

Background:

• Understanding molecular geometry and electronic properties is crucial in organic chemistry.
• Crystal structure analysis provides detailed insights into intermolecular interactions and electron distribution.
• Diazoamine compounds exhibit unique electronic characteristics relevant to materials science.

Purpose of the Study:

• To elucidate the crystal structure of the compound C(14)H(12)N(4)O(3).
• To investigate the stereochemistry, planarity, and intermolecular interactions within the crystal lattice.
• To analyze the electronic properties, specifically pi electron delocalization, in the diazoamine moiety and its substituents.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the three-dimensional atomic arrangement.
• Analysis of bond lengths, bond angles, and torsion angles to assess molecular geometry.
• Identification and analysis of intermolecular interactions, including hydrogen bonds and pi-pi stacking.

Main Results:

• The crystal structure reveals a trans stereochemistry about the N=N double bond in the N=N-N(H) group.
• The molecule is nearly planar, with phenyl rings exhibiting small interplanar angles (0.7(1)° between themselves and up to 11.5(2)° with the nitro group).
• Intermolecular N-H···O interactions form chains along specific crystallographic directions, further stabilized by N···O pi-pi interactions.

Conclusions:

• The crystal structure confirms the trans configuration and near planarity of the molecule.
• Observed intermolecular interactions dictate the packing in the solid state, forming extended chains.
• Evidence of pi electron delocalization over the diazoamine group and aryl substituents suggests unique electronic behavior.