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Updated: Jun 1, 2026
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Palladium N-Heterocyclic Carbene Complexes: Synthesis from Benzimidazolium Salts and Catalytic Activity in Carbon-carbon Bond-forming Reactions
Published on: July 30, 2017
2-(Benzene-sulfonamido)pyridinium perchlorate
Summary
This study details the crystal structure of a novel pyridinium compound, highlighting the near-perpendicular arrangement of its benzene and pyridinium rings. It reveals crucial intra-molecular and inter-molecular hydrogen bonding interactions influencing its solid-state structure.
Area of Science:
- Crystallography
- Supramolecular Chemistry
- Organic Chemistry
Background:
- Understanding the three-dimensional arrangement of atoms in organic compounds is crucial for predicting their properties.
- Hydrogen bonding plays a significant role in molecular recognition and crystal engineering.
Purpose of the Study:
- To elucidate the crystal structure of the title compound, C(11)H(11)N(2)O(2)S(+)·ClO(4) (-).
- To investigate the intra-molecular and inter-molecular interactions within the crystal lattice.
Main Methods:
- Single-crystal X-ray diffraction analysis was employed to determine the molecular and crystal structure.
- Analysis of bond lengths, bond angles, and intermolecular contacts was performed.
Main Results:
- The dihedral angle between the benzene and pyridinium rings is 87.33(10)°, indicating a near-planar conformation.
- An intra-molecular hydrogen bond was observed between the N-H group and an S=O oxygen atom within the cation.
- The crystal structure is characterized by ion pairing, with N-H⋯O hydrogen bonds linking the cation and perchlorate anion.
- Weak C-H⋯O interactions involving the perchlorate anion contribute to the overall molecular packing.
Conclusions:
- The crystal structure reveals a unique spatial arrangement of the aromatic rings and significant hydrogen bonding networks.
- The findings provide insights into the factors governing the solid-state behavior of pyridinium salts and their potential applications in materials science.
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