Untersuchung der grignard-wurtz-reaktion von partiell hydrobromiertem 1,4-polybutadien und partiell α-bromiertem polyoctenylen durch metathese-abbau der polymere und identifizierung der niedermolekularen produkte
✍ Scribed by Hummel, Klaus ;Wedam, Othmar A.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1981
- Weight
- 487 KB
- Volume
- 182
- Category
- Article
- ISSN
- 0025-116X
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✦ Synopsis
Abstract
Partially hydrobrominated 1,4‐polybutadiene and α‐brominated polyoctenylene were treated with pentyl, isopropyl, cyclohexyl, benzyl, 4‐methylbenzyl, phenyl, 4‐methylphenyl, 4‐ethylphenyl, 3,4‐dimethylphenyl, 2,4,6‐trimethylphenyl, 4‐chlorophenyl, 4‐fluorophenyl, 4‐methoxyphenyl, 3,4‐dimethoxyphenyl, and 2‐thienyl magnesium bromide. In addition partially hydrobrominated 1,4‐polybutadiene was treated with 2‐methylbenzyl, 3‐methylbenzyl and 4‐isopropylphenyl magnesium bromide. Polymers were degraded by metathesis with 4‐octene using WCl~6~/(CH~3~)~4~Sn as a catalyst. The low molecular products were separated by gas chromatography and identified by mass spectrometry. Mass spectra of products with 4‐alkyl(aryl)octanediylidene units (from modified polybutadiene) and 2‐alkyl(aryl)octanediylidene units (from polyoctenylene) were compared.