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Construction and Systematical Symmetric Studies of a Series of Supramolecular Clusters with Binary or Ternary Ammonium Triphenylacetates
Published on: February 15, 2016
The structure of ammonium pyrazolates in the solid state
Pilar Navarro1, Felipe Reviriego, Ibon Alkorta
1Instituto de Química Médica, Centro de Química Orgánica Manuel Lora-Tamayo, CSIC, Juan de la Cierva, 3, E-28006 Madrid, Spain.
Magnetic Resonance in Chemistry : MRC
|September 23, 2006
Summary
Researchers formed ammonium pyrazolate salts by combining diethyl 1H-pyrazole-3,5-dicarboxylate with phenethylamine or homoveratrylamine. Solid-state nuclear magnetic resonance (NMR) confirmed the salt formation.
Area of Science:
- Solid-state chemistry
- Organic chemistry
- Crystallography
Background:
- Diethyl 1H-pyrazole-3,5-dicarboxylate is a versatile organic compound.
- Primary amines like phenethylamine and homoveratrylamine are common building blocks in organic synthesis.
- Salt formation is a key reaction in organic chemistry, influencing compound properties.
Purpose of the Study:
- To investigate the reaction between diethyl 1H-pyrazole-3,5-dicarboxylate and specific primary amines.
- To characterize the crystalline products formed from these reactions.
- To confirm the structural nature of the resulting compounds.
Main Methods:
- Equimolar mixing of diethyl 1H-pyrazole-3,5-dicarboxylate with phenethylamine.
- Equimolar mixing of diethyl 1H-pyrazole-3,5-dicarboxylate with homoveratrylamine.
- Solid-state 13C and 15N Cross-Polarization Magic Angle Spinning Nuclear Magnetic Resonance (CPMAS NMR) spectroscopy for structural determination.
Main Results:
- Crystalline products were successfully obtained from both reaction mixtures.
- 13C and 15N CPMAS NMR data provided definitive evidence for salt formation.
- The resulting crystalline compounds were identified as ammonium pyrazolate salts.
Conclusions:
- The reaction between diethyl 1H-pyrazole-3,5-dicarboxylate and the studied primary amines yields ammonium pyrazolate salts.
- Solid-state NMR is a powerful technique for characterizing such salt structures.
- This study expands the understanding of pyrazole derivative chemistry and salt formation.
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