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A structural study of 2,4-di-methyl-aniline derivatives.

Samuel C Penner1, Maryam Kalvandi1, Jamie S Ritch1

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This study presents the first crystallographic characterization of two nitrogen-containing small molecules. Findings reveal unique hydrogen-bonded chains and halogen-halogen interactions in these compounds.

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Area of Science:

  • Crystallography
  • Organic Chemistry
  • Materials Science

Background:

  • Crystallographic studies of nitrogen-containing small molecules are crucial for understanding structure-activity relationships.
  • Elucidating aggregation modes provides insights into molecular interactions and material properties.

Purpose of the Study:

  • To perform the first-time crystallographic characterization of two previously synthesized nitrogen-containing small molecules.
  • To investigate the intermolecular interactions and crystal packing of these compounds.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the molecular structures.
  • Synthesis of target molecules involved reactions of 2,4-dimethyl-aniline with specific reagents.

Main Results:

  • 2-bromo-4,6-dimethyl-aniline (1) forms crystals with hydrogen-bonded chains and Type I halogen-halogen interactions.
  • N,N'-bis-(2,4-dimethyl-phenyl)piperazine (2) was successfully synthesized and crystallographically characterized.
  • A mixture including N,N'-bis-(2,4-dimethyl-phenyl)ethylenediamine (3) was also obtained from the alkylation reaction.

Conclusions:

  • The crystallographic data provide detailed structural information on the studied molecules.
  • The identified interactions (hydrogen bonding, halogen-halogen) are key to understanding their solid-state behavior.
  • This work expands the structural database of nitrogen-containing organic compounds.