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6-Amino-nicotinamide.

Lerato P Ntsala1, Andreas Lemmerer

  • 1Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag 3, PO WITS 2050, Johannesburg, South Africa.

Acta Crystallographica. Section E, Structure Reports Online
|August 21, 2012
PubMed
Summary
This summary is machine-generated.

This study details the crystal structure of 6-aminonicotinamide, revealing specific molecular orientations and hydrogen bonding patterns. These interactions form ribbons and a 3D arrangement, crucial for understanding its solid-state properties.

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Area of Science:

  • Crystallography
  • Chemical Physics
  • Materials Science

Background:

  • Understanding the solid-state structure of organic molecules is essential for predicting their physical and chemical properties.
  • 6-aminonicotinamide is a derivative of nicotinamide with potential biological and material applications.

Purpose of the Study:

  • To elucidate the detailed crystal structure of 6-aminonicotinamide.
  • To analyze the intermolecular interactions, specifically hydrogen bonding, that govern its crystal packing.

Main Methods:

  • Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
  • Analysis of bond lengths, bond angles, and torsion angles provided insights into molecular conformation.
  • Hydrogen bond analysis identified the types and geometries of intermolecular interactions.

Main Results:

  • The amide group exhibits a specific syn orientation relative to the pyridine nitrogen atom (torsion angle of -23.55°).
  • Four hydrogen bonds (N-H⋯N and N-H⋯O) mediate crystal packing.
  • Centrosymmetric rings are formed, leading to a ribbon-like arrangement of 6-aminonicotinamide molecules via amide and amine groups.
  • A three-dimensional packing network is established through the remaining hydrogen bonds.

Conclusions:

  • The crystal structure of 6-aminonicotinamide is characterized by a specific amide group conformation and extensive hydrogen bonding.
  • These interactions dictate a unique ribbon and 3D packing arrangement, influencing the compound's solid-state behavior.
  • The findings provide a structural basis for further investigations into the properties and applications of 6-aminonicotinamide.