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Polymerisation von fulvenen, 4. Anionische polymerisation von 6,6-dimethylfulven

✍ Scribed by Kronig, Peter ;Slongo, Mario ;Neuenschwander, Markus

Publisher
Wiley (John Wiley & Sons)
Year
1982
Weight
744 KB
Volume
183
Category
Article
ISSN
0025-116X

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✦ Synopsis

Abstract

The reaction of 6,6‐dimethylfulvene (1) with small amounts of sodium cyclopentadienide (Na‐CPD) gives a mixture of oligomeric products, from which 1‐cyclopentadienyl‐1,3,3,‐trimethyltetrahydropentalene (7) was isolated with 67% yield. The structure of the main product 7 was proved by combination of spectrosopic methods as well as by NMR spectroscopy of its dianion. A reasonable reaction mechanism is presented and supported by isolation of other dimers 9 and 12 and trimers 10 as well as of side products 11 and 13. The product distribution is severely influenced by increasing the amount of Na‐CPD (favouring oligomers of type 11 and 13) as well as by addition of crown ether.

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