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O- and m-Benzenedicarbaldehyde.

Doyle Britton1

  • 1Department of Chemistry, University of Minnesota, Minneapolis, MN 55455-0431, USA. britton@chem.umn.edu

Acta Crystallographica. Section C, Crystal Structure Communications
|November 5, 2002
PubMed
Summary

This study investigates the crystal structures of o-benzenedicarbaldehyde and m-benzenedicarbaldehyde. Findings reveal intramolecular hydrogen bonding in the ortho isomer and intermolecular C-H.O contacts in both isomers.

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Area of Science:

  • Organic Chemistry
  • Crystallography
  • Supramolecular Chemistry

Background:

  • Benzenedicarbaldehydes are aromatic organic compounds with two aldehyde functional groups attached to a benzene ring.
  • Understanding their solid-state structures is crucial for predicting their reactivity and physical properties.

Purpose of the Study:

  • To elucidate the crystal structures of o-benzenedicarbaldehyde and m-benzenedicarbaldehyde.
  • To identify and characterize intermolecular and intramolecular interactions within their crystal lattices.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the molecular and crystal structures.
  • Analysis of bond distances, angles, and non-covalent interactions was performed.

Main Results:

  • o-Benzenedicarbaldehyde exhibits a weak intramolecular hydrogen bond between adjacent aldehyde groups (C-O distance of 2.852 Å).
  • m-Benzenedicarbaldehyde crystallizes in two distinct isomorphs.
  • Both isomers display intermolecular C-H···O contacts involving aldehyde and ring hydrogen atoms.

Conclusions:

  • The presence of intramolecular hydrogen bonding influences the conformation of o-benzenedicarbaldehyde.
  • Intermolecular interactions play a significant role in the packing and stability of both benzenedicarbaldehyde isomers in the solid state.

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