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Metathesis polymerization of substituted acetylenes by Mo(NO)2(O2CR)2–Lewis acid catalysts

✍ Scribed by A Keller; R Matusiak

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
89 KB
Volume
142
Category
Article
ISSN
1381-1169

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✦ Synopsis

Ž . Ž . Ž Mo NO O CR -Lewis acid catalysts Lewis acid s TiCl , SnCl , EtAlCl ; R s phenyl, methylvaleric, ethylhex-2 2 2 4 4 2

. Ž . anoic induce monosubstituted acetylenes phenylacetylene, tert-butylacetylene to polymerize. The catalytic ability of these catalyst strongly depends on the Lewis acid and solvent. The system with SnCl in benzene is almost selective in 4 Ž . polymerization of phenylacetylene conversion: 60%, yield of polymer 56% while in toluene cyclotrimers are the main Ž . products conversion: 70%, yield of cyclotrimers: 69% . However, the TiCl system trimerized phenylacetylene in PhCl 4 Ž . solution conversion: 76%, yield of cyclotrimers: 66.5% . The structure of obtained polymers and mechanisms of polymerization and cyclotrimerization reactions were determined.

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