Abstract
The tautomerism of 1-phenyl-1,2-dihydro-3H-pyrazol-3-One was investigated. An X-ray crystal structure anal. exhibits dimers of 1-phenyl-1H-pyrazol-3-ol units. Comparison of NMR (NMR) spectra in liq. state (1H, 13C, 15N) with those of "fixed" derivs., as well as with the corresponding solid state NMR spectra reveal this compd. to exist predominantly as 1H-pyrazol-3-ol mol. pairs in nonpolar solvents like CDCl3 or C6D6, whereas in DMSO-d6 the corresponding monomers are at hand. Moreover, the NMR data of different related 1H-pyrazol-3-ol derivs. are presented.
Original language | English |
---|---|
Pages (from-to) | 1287-1292 |
Number of pages | 6 |
Journal | Beilstein Journal of Organic Chemistry |
Volume | 14 |
DOIs | |
Publication status | Published - 4 Jun 2018 |
Austrian Fields of Science 2012
- 104015 Organic chemistry
Keywords
- dimerization
- NMR (H-1; C-13; N-15)
- pyrazolones
- X-ray structure analysis
- thionyl chloride
- PHOTOCHEMICAL OXIDATION
- MULTICOMPONENT REACTION
- BIOLOGICAL-ACTIVITIES
- HETEROCYCLIC-ANALOGS
- PYRAZOLE
- CHEMISTRY
- 13C
- Thionyl chloride
- 15N)
- Pyrazolones
- NMR (1H
- Dimerization