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The Preparation and Isolation of 4-Methyl-1,3-pentadiene 1,2

✍ Scribed by Bachman, G. Bryant; Goebel, Charles G.

Book ID
126223128
Publisher
American Chemical Society
Year
1942
Tongue
English
Weight
443 KB
Volume
64
Category
Article
ISSN
0002-7863

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πŸ“œ SIMILAR VOLUMES

Structural characterization of syndiotac
Structural characterization of syndiotactic 1,2-poly(4-methyl-1,3-pentadiene)
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## Abstract 4‐Methyl‐1,3‐pentadiene was polymerized with the MAO/CpTiCl~3~ (MAO: methyl‐aluminoxane, Cp: Cyclopentadienyl) system to yield a highly stereoregular syndiotactic 1,2‐polymer. Fiber diffraction patterns indicate two crystalline modifications: a major one with a repeat of 11.73 Γ… and min

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Different crystallization conditions were investigated for syndiotactic poly-l,2-(4-methyl-l,3-pentadiene) (P4MPD). The thermal crystallization is a slow process. At 60Β°C long times are needed to induce the structural rearrangements. Much shorter times are necessary for oriented samples, so that str

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R~amg--On a d~termin~ par spectrographie i.r. et RMN la microstructure des poly(m6thyl-4 pentadi~ne-l,3) et poly(m&hyl-2 pentadi~ne-l,3 trans) obtenus /t l'aide de butyl-lithium en milieu hydrocarbonS. Le poly(m~thyl-2 pentadi~ne-l,3) pr~sente une structure mixte (1,4 cis ~ 60 pour cent; 1,4 trans ~