2-Acetyl-pyrazine 4-methyl-thio-semi-carbazone
Jing Zhou1, Yu-Xia Wang, Chun-Ling Chen
1Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475001, People's Republic of China.
Acta Crystallographica. Section E, Structure Reports Online
|January 5, 2011
Summary
Researchers synthesized a novel compound, C(8)H(11)N(5)S, using 2-acetyl-pyrazine and 4-methyl-3-thio-semicarbazide. The study reveals its thione form, E configuration, and intermolecular hydrogen bonding interactions.
Area of Science:
- Organic Chemistry
- Crystallography
- Chemical Synthesis
Background:
- Pyrazine derivatives are important in medicinal chemistry.
- Thio-semicarbazides are versatile building blocks for heterocyclic compounds.
- Understanding molecular interactions is key to drug design.
Purpose of the Study:
- To synthesize and characterize a novel pyrazine derivative.
- To elucidate the structural and conformational properties of the title compound.
- To investigate intermolecular interactions in the solid state.
Main Methods:
- Chemical synthesis involving the reaction of 2-acetyl-pyrazine with 4-methyl-3-thio-semicarbazide.
- Structural analysis using X-ray crystallography.
- Spectroscopic characterization (e.g., NMR, IR).
Main Results:
- Successful synthesis of the target compound with molecular formula C(8)H(11)N(5)S.
- The compound exists predominantly in the thione tautomeric form.
- X-ray diffraction analysis confirmed the E-configuration and revealed extensive intermolecular N-H⋯N and N-H⋯S hydrogen bonding networks.
Conclusions:
- The novel pyrazine derivative was efficiently synthesized and structurally characterized.
- The observed thione form and E-configuration are stable in the solid state.
- Intermolecular hydrogen bonds play a crucial role in the crystal packing and stability of the molecule.
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