Alrstraet--~3C-NMR spectroscopy has been used for examination of 2-cyano-2-propyl end-groups in copolymers of styrene (STY) with methacrylonitrile (MAN) and with vinyl acetate (VAC) prepared at 10@' using as initiator 2-cyano-2-propylazoformamide enriched in its methyl groups with carbon-13. It is d
Relative Reactivities of Substituted Anthracenes towards the Addition of 2-Cyano-2-propyl Radicals
β Scribed by FARENHORST, E.; KOOYMAN, E. C.
- Book ID
- 118673700
- Publisher
- Nature Publishing Group
- Year
- 1955
- Tongue
- English
- Weight
- 226 KB
- Volume
- 175
- Category
- Article
- ISSN
- 0028-0836
- DOI
- 10.1038/175598a0
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## Abstract Copolymerizations of styrene (S) with methyl methacrylate (MMA) and methacrylonitrile (MAN) at 60Β°C were performed with azoisobutyronitrile as initiator, enriched in its methyl groups with ^13^C. From the NMR spectrum of a copolymer it is possible to compare the numbers of initiator fra
Absolute rate constants for the addition of the 2-cyano-2-propyl radical to 26 alkenes CH2 = CXY at 315 K were determined in solution by time-resolved electron-spin-resonance spectroscopy. They vary with the alkene substituents from 30 M-' s-l to 7'010 M-' s-'. For styrene the temperature dependence