1,5-Bis(2-methyl-phen-yl)-3-nitro-formazan.

Area of Science:

• Organic Chemistry
• Crystallography

Background:

• Formazan compounds exhibit diverse chemical properties and structural motifs.
• Understanding tautomerism is crucial for predicting reactivity and physical characteristics.

Purpose of the Study:

• To elucidate the structural features and intermolecular interactions of a novel organic compound.
• To investigate the presence and nature of tautomerism within the formazan group.

Main Methods:

• Single-crystal X-ray diffraction was employed to determine the molecular structure.
• Analysis of bond distances and Fourier difference maps provided insights into tautomerism.
• Crystal packing was examined to identify intermolecular forces.

Main Results:

• The nitro group oxygen atoms exhibited disorder with a 0.75:0.25 occupancy ratio.
• Amine-imine tautomerism was confirmed through similar C-N bond lengths (1.319(2) and 1.332(3) Å) and proton distribution (0.53:0.47 ratio).
• Significant C-H⋯O and π-π interactions were identified in the crystal lattice.

Conclusions:

• The title compound displays amine-imine tautomerism, a key characteristic of the formazan moiety.
• Disorder in the nitro group and specific intermolecular interactions influence the crystal structure.
• This detailed structural analysis contributes to the understanding of formazan chemistry.