Solid-state 13 C NMR spectra and ab initio calculations of 13 C NMR chemical shifts show that poly(ethylene oxide) (PEO) carbons in complex with LiCF 3 SO 3 (both in crystalline and amorphous phase) are more shielded in comparison with neat PEO, due to the coordination to the Li + cation. The result
Thermodynamic stability of indazole studied by NMR–NQR spectroscopy and ab initio calculations
✍ Scribed by J. N. Latosińska
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 135 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0749-1581
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✦ Synopsis
The aim of this study was to verify whether NQR can be the method of identification as to which of the tautomeric forms 1H or 2H of indazole occurs in a given solid-state substance. For this purpose, the enthalpy of formation and parameters characterizing the NQR spectra were calculated and compared with experimental data. The results prove that the calculations allow unambiguous identification of the two tautomeric forms.
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