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N,N-Bis(4-meth-oxy-benzyl-idene)-3,3'-dimethyl-benzidine.

Juangang Wang1, Peipei Yang, Jin Yang

  • 1College of Chemistry and Material Science, Huaibei Normal University, Xiangshan, Huaibei 235000, People's Republic of China.

Acta Crystallographica. Section E, Structure Reports Online
|August 13, 2011
PubMed
Summary
This summary is machine-generated.

This study details the crystal structure of a novel Schiff base, C(30)H(28)N(2)O(2), synthesized from 4-methoxy-benzaldehyde and 3,3'-dimethyl-benzidine. The molecule exhibits twisted aromatic rings and is stabilized by intermolecular hydrogen bonds in its crystal packing.

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Area of Science:

  • Crystallography
  • Organic Chemistry
  • Materials Science

Background:

  • Schiff bases are versatile organic compounds with diverse applications.
  • Understanding the crystal structure of novel Schiff bases is crucial for predicting their properties and potential uses.

Purpose of the Study:

  • To elucidate the crystal structure of a Schiff base synthesized from 4-methoxy-benzaldehyde and 3,3 '-dimethyl-benzidine.
  • To analyze the molecular geometry, including aromatic ring twists and dihedral angles.
  • To investigate the intermolecular interactions stabilizing the crystal lattice.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
  • The synthesis involved a condensation reaction between the specified aldehyde and diamine precursors.
  • Crystal structure analysis included bond lengths, bond angles, and intermolecular interactions.

Main Results:

  • The title compound, C(30)H(28)N(2)O(2), crystallizes with a crystallographic twofold rotation axis.
  • The asymmetric unit contains half a molecule, with biphenyl rings twisted by 13.49(7)°.
  • Significant dihedral angles between aromatic rings were observed (49.95(12)° and 50.06(12)°).
  • Weak intermolecular C-H⋯O hydrogen bonds were identified as key stabilizing forces in the crystal packing.

Conclusions:

  • The crystal structure of the novel Schiff base was successfully determined.
  • The molecular geometry reveals significant torsional strain within the biphenyl unit.
  • Intermolecular hydrogen bonding plays a vital role in the crystal packing and stability of this Schiff base.