The oxidation mechanism of polypropylene: contribution of 13C-NMR spectroscopy
β Scribed by D. Vaillant; J. Lacoste; G. Dauphin
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 361 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0141-3910
No coin nor oath required. For personal study only.
π SIMILAR VOLUMES
A&met-The previously proposed electrochemical oxidation mechanism of the L-ascorbic and D araboascorbic acids in basic medium must be rejcckd because of the variation in the carbon chemical shifts and coupling constants with the pH, which shows that the supposed rupture of the furanose rings at pH -
Be 1 g i u m biaceae), and of six common acyl substituents of naturally occurring phorbol esters were recorded and the signals assigned. The spectral data for this series of model compounds appeared to be important tools for the identification and the structure elucidation of naturally occurring and
## Abstract ^13^C shifts are reported for diastereomers with halogen, oxygen and amino substituents which are mainly at vicinal chiral centres. The conformer populations underlying the ^13^C shift analysis can be verified by chemical means, such as change of temperature, solvent polarity (with diha