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Related Experiment Videos

Fluorene-1-carboxylic acid

A C Blackburn1, A J Dobson, R E Gerkin

  • 1Department of Chemistry, Ohio State University, Columbus 43210, USA.

Acta Crystallographica. Section C, Crystal Structure Communications
|April 15, 1996
PubMed
Summary
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This study examines fluorene-1-carboxylic acid, revealing a cyclic dimer hydrogen bond and an ordered carboxyl hydrogen atom. Structural analysis shows fluorene core distances similar to fluorene, but a larger dihedral angle.

Area of Science:

  • Organic Chemistry
  • Crystallography
  • Molecular Structure

Background:

  • Fluorene derivatives are important in materials science and medicinal chemistry.
  • Understanding the hydrogen bonding and structural characteristics of fluorene-1-carboxylic acid is crucial for predicting its physical and chemical properties.

Purpose of the Study:

  • To elucidate the crystal structure and hydrogen bonding of fluorene-1-carboxylic acid.
  • To compare the structural parameters of fluorene-1-carboxylic acid with those of fluorene.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
  • Analysis of hydrogen bonding interactions and bond distances within the fluorene core.

Main Results:

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  • Fluorene-1-carboxylic acid forms cyclic dimers through hydrogen bonding around a center of symmetry.
  • The carboxyl hydrogen atom is found to be ordered in the crystal structure.
  • Distances within the fluorene core are comparable to those in fluorene.
  • A larger dihedral angle of the fluorene core was observed compared to fluorene.

Conclusions:

  • The crystal structure of fluorene-1-carboxylic acid is characterized by specific hydrogen bonding and an ordered carboxyl group.
  • The observed structural differences, particularly the larger dihedral angle, may influence the compound's properties and reactivity.