Tautomerism of azine derivatives. 11.14N-NMR and17O-NMR investigation of intrachelate tautomerism of acylmethylpyridines
β Scribed by V. V. Lapachev; S. A. Stekhova; I. Ya. Mainagashev; M. A. Fedotov; V. E. Khall; V. P. Mamaev
- Book ID
- 112377195
- Publisher
- Springer US
- Year
- 1986
- Tongue
- English
- Weight
- 748 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0009-3122
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13C and 17O NMR spectra are reported for three series of Schi β bases : 2-(aminomethylene)cyclohexanones (1), salicylideneamines (2) and N-(2-hydroxy-1-naphthalenylmethylene)amines (3). The 13C and 17O NMR data show that Schi β bases 1 exist in ketoenamine form, 2 in enolimine form and 3 as an equil
## Abstract Nitrogen chemical shifts are shown to provide a means of estimating equilibrium compositions of tautomeric systems of mercaptoβ and aminoβderivatives of pyridine. Carbon chemical shifts can afford only qualitative information about such equilibria.
where R is the gas constant and F the Faraday constant. The origin of the factor of 114 is the equation (b),