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Polymerization of cyclohexene oxide with aluminum complex/silanol catalyst. VI. Oligomer and polymer effects

✍ Scribed by Hayase, Shuzi ;Onishi, Yasunobu ;Suzuki, Shuichi ;Wada, Moriyasu

Book ID
105334498
Publisher
John Wiley and Sons
Year
1983
Weight
574 KB
Volume
21
Category
Article
ISSN
0360-6376

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✦ Synopsis

Abstract

The activity of an aluminum complex/polysilanol polymerization catalyst was examined in order to confirm the dependence of catalytic activation on silanol chain length. Tris (acetylacetonato)–aluminum/silanol increased when silanols with an intramolecular hydrogen bond such as the trimer of diphenylsilanediol, polydiphenyl(4‐vinylphenyl)silanol, and polymeric silanol of silicone were used. However, when tris(ethylacetoacetato)aluminum or tris(salicylaldehydato)aluminum was used, the product obtained from the reaction of a part of the aluminum complex with the polysilanols had to be considered in any explanation of the catalytic activation. The active catalyst with such aluminum complexes was obtained when the silanols that had intramolecular hydrogen bonds and gave the appropriate ratio of the reaction between the aluminum complex and silanol were used.

📜 SIMILAR VOLUMES

Polymerization of cyclohexene oxide with
Polymerization of cyclohexene oxide with aluminum complex/silanol catalysts. V. A catalytic activity dependence on the aluminum chelate structure
✍ Hayase, S. ;Onishi, Y. ;Yoshikiyo, K. ;Suzuki, S. ;Wada, M. 📂 Article 📅 1982 🏛 John Wiley and Sons ⚖ 603 KB

## Abstract The catalytic activity of an aluminum complex/silanol system was found to vary with the aluminum ligand as follows: β‐diketonate < β‐ketoester anion < ortho‐carbonylphenolate. Aluminum complexes with electron donating groups conjugated with a carbonyl group had higher catalytic activity