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Dichloridobis(pyrazine-2-carboxamide-κN(4))zinc(II)
Sadif A Shirvan1, Sara Haydari Dezfuli
1Department of Chemistry, Omidieh Branch, Islamic Azad University, Omidieh, Iran.
Summary
This study details the crystal structure of a zinc compound with pyrazine-2-carboxamide ligands. The molecule exhibits distorted tetrahedral geometry, with hydrogen bonds stabilizing its crystal packing.
Area of Science:
- Inorganic Chemistry
- Crystallography
- Coordination Chemistry
Background:
- Pyrazine-2-carboxamide is a nitrogen-containing heterocyclic compound with potential applications in coordination chemistry.
- Zinc(II) complexes are widely studied for their diverse structural motifs and potential catalytic or biological activities.
Purpose of the Study:
- To synthesize and characterize the crystal structure of a novel zinc(II) coordination compound with pyrazine-2-carboxamide.
- To investigate the coordination geometry and intermolecular interactions within the crystal lattice.
Main Methods:
- Single-crystal X-ray diffraction was employed to determine the molecular and crystal structure.
- Structural analysis included bond length, bond angle, and dihedral angle calculations.
- Identification of intermolecular interactions such as hydrogen bonds and C-H⋯O interactions.
Main Results:
- The title compound, [ZnCl(2)(C(5)H(5)N(3)O)(2)], crystallizes with m symmetry.
- The zinc(II) cation adopts a distorted tetrahedral geometry, coordinated by two chloride anions and two pyrazine-2-carboxamide ligands (ZnCl2N2).
- The pyrazine rings of the ligands are nearly perpendicular (dihedral angle = 86.61°), and crystal packing is stabilized by intermolecular N-H⋯O, N-H⋯N hydrogen bonds, and weak C-H⋯O interactions.
Conclusions:
- The study successfully elucidated the crystal structure of the zinc(II)-pyrazine-2-carboxamide complex.
- The findings provide insights into the coordination behavior of pyrazine-2-carboxamide and the structural characteristics of its zinc(II) complexes.
- The identified intermolecular interactions are crucial for understanding the solid-state properties and potential supramolecular assembly of the compound.
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