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Glycine sodium nitrate.

R V Krishnakumar1, M Subha Nandhini, S Natarajan

  • 1Department of Physics, Thiagarajar College, Madurai 625 009, India.

Acta Crystallographica. Section C, Crystal Structure Communications
|October 16, 2001
PubMed
Summary
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This study reveals that glycine in sodium nitrate adopts a zwitterionic form. These glycine molecules form hydrogen bonds, creating layers sandwiched between sodium nitrate.

Area of Science:

  • Crystallography
  • Solid-state chemistry
  • Molecular structure

Background:

  • Glycine is a fundamental amino acid with diverse chemical properties.
  • Sodium nitrate is an inorganic salt with various industrial applications.
  • Understanding the interaction between organic molecules and inorganic salts is crucial for materials science.

Purpose of the Study:

  • To elucidate the structural characteristics of the compound formed between sodium nitrate and glycine.
  • To investigate the coordination environment of sodium ions within the crystal structure.
  • To analyze the hydrogen bonding network and molecular arrangement.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the crystal structure.
  • Analysis of bond lengths, angles, and coordination polyhedra.

Related Experiment Videos

  • Hydrogen bond analysis to identify intermolecular interactions.

    • Main Results:

    • The glycine molecule exists in its zwitterionic form (NH3+CH2COO-).
    • The sodium ion (Na+) displays eightfold coordination, forming a distorted hexagonal bipyramid.
    • Glycine molecules are linked via head-to-tail hydrogen bonds, forming layers intercalated with Na(NO3) units.

    Conclusions:

    • The crystal structure demonstrates a unique arrangement of zwitterionic glycine and sodium nitrate.
    • The observed hydrogen bonding pattern dictates the layered structure and molecular packing.
    • This finding contributes to the understanding of organic-inorganic hybrid materials.