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Related Experiment Videos

Glycinium oxalate.

M Subha Nandhini1, R V Krishnakumar, S Natarajan

  • 1Department of Physics, Madurai Kamaraj University, Madurai 625 021, India.

Acta Crystallographica. Section C, Crystal Structure Communications
|February 15, 2001
PubMed
Summary
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This study reveals that in the crystal structure of glycinium hydrogen oxalate, glycine forms a cation and oxalic acid forms a mono-ionized anion. These ions arrange in alternating columns, stabilized by a robust hydrogen bonding network.

Area of Science:

  • Crystallography
  • Supramolecular Chemistry
  • Chemical Physics

Background:

  • Glycine and oxalic acid are fundamental organic molecules with diverse applications.
  • Understanding the solid-state behavior of their ionic co-crystals is crucial for materials science.
  • Hydrogen bonding plays a key role in molecular self-assembly and crystal engineering.

Purpose of the Study:

  • To elucidate the crystal structure of the title compound, C2H6NO2+.C2HO4-.
  • To determine the ionic states of glycine and oxalic acid within the crystal lattice.
  • To investigate the intermolecular interactions, particularly hydrogen bonding, that stabilize the structure.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the precise atomic arrangement.

Related Experiment Videos

  • Analysis of bond lengths and angles provided insights into molecular geometry and ionic states.
  • Intermolecular interaction analysis, including hydrogen bond network assessment, was performed.

    • Main Results:

    • The glycine molecule exists as a glycinium cation (C2H6NO2+).
    • The oxalic acid molecule is present as a mono-ionized semi-oxalate anion (C2HO4-).
    • The crystal structure features alternating columns of glycinium and semi-oxalate ions, stabilized by an extensive hydrogen bond network.

    Conclusions:

    • The title compound is a co-crystal formed between glycinium and semi-oxalate ions.
    • The observed crystal packing is dictated by a significant network of hydrogen bonds.
    • This structural characterization provides fundamental insights into the supramolecular assembly of amino acid-oxalate systems.