1-Cyclo-pentyl-idene-2-(2,4-dinitro-phenyl)-hydrazine

Area of Science:

• Organic Chemistry
• Crystallography

Background:

• The synthesis of novel organic compounds is crucial for advancing materials science and medicinal chemistry.
• Understanding molecular structure and intermolecular forces is key to predicting material properties.

Purpose of the Study:

• To synthesize and characterize a new chemical entity derived from (2,4-dinitrophenyl)hydrazine and cyclopentanone.
• To elucidate the crystal structure and identify key intermolecular interactions of the synthesized compound.

Main Methods:

• Chemical synthesis involving the reaction of (2,4-dinitrophenyl)hydrazine with cyclopentanone.
• Single-crystal X-ray diffraction to determine the molecular and crystal structure.
• Analysis of crystallographic data to identify hydrogen bonding and π-π interactions.

Main Results:

• Successful synthesis of the target compound with chemical formula C(11)H(12)N(4)O(4).
• The crystal structure exhibits disorder in the cyclopentyl fragment over two positions (0.63:0.37 occupancy).
• An intramolecular N-H⋯O hydrogen bond was observed, contributing to conformational stability.
• Intermolecular π-π stacking interactions between benzene rings were identified, with a centroid-to-centroid distance of 3.589 Å.

Conclusions:

• The study reports the synthesis and detailed structural characterization of a novel dinitrophenylhydrazine derivative.
• The crystal packing is influenced by both intramolecular hydrogen bonding and significant intermolecular π-π interactions.
• The observed molecular disorder provides insights into the conformational flexibility of the cyclopentyl moiety.