Comparative 1H NMR and UV-visible studies of polyene polymer epoxidations catalyzed by iron(III), manganese(III) and chromium(III) porphyrins
✍ Scribed by E. M. Davoras; R. Diaper; A. Dervissi; M. J. Tornaritis; A. G. Coutsolelos
- Publisher
- John Wiley and Sons
- Year
- 1998
- Tongue
- English
- Weight
- 160 KB
- Volume
- 02
- Category
- Article
- ISSN
- 1088-4246
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✦ Synopsis
The catalytic epoxidation of cis-polybutadiene was studied in two-phase systems, CH 2 CI 2/ H 2 O and PhIO (solid)/ CH 2 Cl 2, using chlorochromium(III), chloromanganese(III) and chloroiron(III) tetraphenylporphyrin complexes as catalysts. Comparison of the catalytic activity of these three catalysts showed that the manganese porphyrin is the most suitable catalyst for this reaction. The results are based on reaction product ratios as determined by 1 H NMR . UV-Visible spectroscopy allowed monitoring of the metalloporphyrin evolution during the catalytic reaction.