N,N-Dihexyl-4-[2-(4-nitro-phen-yl)vin-yl]aniline

Area of Science:

• Organic Chemistry
• Crystallography
• Materials Science

Background:

• The synthesis of novel organic compounds is crucial for developing new materials with tailored electronic properties.
• Understanding molecular conformation and electronic coupling is key to predicting and controlling material behavior.

Purpose of the Study:

• To synthesize and characterize a new organic compound with potential electronic applications.
• To investigate the crystal structure, focusing on molecular geometry, hexyl chain conformations, and electronic coupling.

Main Methods:

• Synthesis via Horner olefination reaction between p-dihexyl-amino-benzaldehyde and diethyl p-nitro-benzyl-phospho-nate.
• X-ray crystallography to determine the crystal structure and analyze molecular conformations and bond lengths.
• Analysis of torsion angles and planarity to assess electronic coupling through the stilbene unit.

Main Results:

• The compound crystallizes with two independent molecules (A and B) in the asymmetric unit, both exhibiting similar π-system geometries.
• Significant variations in hexyl chain conformations were observed between and within molecules, including all-anti, gauche-anti-gauche-anti, and anti-anti-gauche-anti arrangements.
• High molecular planarity and short aniline C-N bonds (1.385(3) Å and 1.378(3) Å) indicate strong electronic coupling via the stilbene unit. One methylene group shows disorder.

Conclusions:

• The synthesized compound displays complex conformational flexibility in its alkyl chains despite a highly planar core structure.
• The observed planarity and short C-N bonds strongly suggest efficient electronic communication across the molecule.
• This structural insight is valuable for designing organic materials with specific electronic and photophysical properties.