Anionic ring opening polymerization of octamethyltetrasilacyclopentane

Chemistry Letters

Volumn , Issue 11, 1997, Pages 1121-1122

  Sanji, Takanobu ^a   Hanao, Hiroyuki ^a   Sakurai, Hideki ^a  

^a TOKYO UNIVERSITY OF SCIENCE   (Japan)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0031319461     PISSN: 03667022     EISSN: None     Source Type: Journal    
DOI: 10.1246/cl.1997.1121     Document Type: Article

References (16)

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6. Preliminary results were presented at the 43rd Symposium on Organometallic Chemistry, Osakajapan, T. Sanji, H. Hanao, and H. Sakurai, PA 121 (1996). Very recently, an NTT group reported that the syntheses and properties of poly(1 ,1,2,2,3,3,4,4-octamethyltetrasilanylenemethylene) and related polymers by sodium coupling method: a) H. Isaka, H. Taramae, M. Fujiki, and N. Matsumoto, Macromolecules, 28, 4733 (1995);
7. b) H. Isaka, Macromolecules, 30, 344 (1997).
8. +, 100), 231 (15.3).
9. In a 50 ml two-necked flask, equipped with a magnetic stirring bar, a rubber septum, and a three-way stopcock, were placed 1 (960 mg, 3.9 mmol), THF (5 ml), and HMPA (0.1 ml) under dry argon. A hexane solution of n-butyllithium (0.78 mmol) was added to the solution at -78°C. The mixture was stirring at -78°C for 9 h, a few drops of ethanol were added to the mixture. After removal of the solvent, the residual mass was dissolved in benzene and polymer was precipitated by pouring the solution into methanol. The second cycle of dissolving-precipitation followed by freeze-drying gave polymer as a white powder (610 mg, 64%).
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13. -1).
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