Aromaticity in heterocyclic systems III. The structure and proton magnetic resonance spectra of certain imidazo[1,2-a]pyridines
β Scribed by John P. Paolini; Roland K. Robins
- Book ID
- 112121278
- Publisher
- Journal of Heterocyclic Chemistry
- Year
- 1965
- Tongue
- English
- Weight
- 594 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0022-152X
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## Abstract The ^1^H NMR spectra of imidazo [1,2β__a__]pyrimidine derivatives have been analysed to study the aromatic character and protonation behaviour of this system. By employing the βring currentnβ model and calculations based on the coupled HartreeβFock method it can be deduced that a large
## Abstract Solvent effects on the ^1^H NMR parameters of perhydroβoxazolo[3,4β__a__]pyridine, perhydropyrido[1,2β__c__]β[1,3]oxazine and perhydrothiazolo[3,4β__a__]pyridine derivatives are described. Particularly marked are changes in the protonβproton geminal coupling constants of the NCH~2~O and