The fraction of the conformer with the boat ring C in the conformational equilibrium in N-methylangustifoline (7) in chloroform and benzene solutions was determined to be ca. 34% using coupling constant J7-13~3. In angustifoline (5) J7-131~ could not be determined directly from the spectra; a simula
The conformational equilibrium in piperidine: Evidence from deuteronation of model compounds
β Scribed by P.J. Crowley; G.A. Morris; M.J.T. Robinson
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- French
- Weight
- 237 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0040-4039
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π SIMILAR VOLUMES
The A value of deuterium in cyclohexane-d1 is shown to be 8.3 \_+ I .5 cal/mol by peak integration of the deuteron NMR spectrum at -95 "C; this is in disagreement with a previous measurement (22 f 5 cal/mol) by this method reported by Aydin and Gunther, but is close to the A value (6.3 + 1.5 cal/mol
## Abstract Coups have been used as a weapon to overthrow democratic governments in Fiji since 1987. The postβ1987 period has been one of the most volatile ones in Fiji's history, in that it has undergone 15 changes in government. In this paper, we analyse the long run economyβwide impact of the Ma