T. Londergan, Yujian You, M. Thompson
Apr 17, 1998
Citations
0
Influential Citations
33
Citations
Journal
Macromolecules
Abstract
Dihydridocarbonyltris(triphenylphosphine)ruthenium catalyzed copolymerization of acetophenone and 1,4-bis((trimethylsilyl)ethynyl)benzene yields a linear copolymercopoly[2-acetyl-1,3- phenylene/,-bis((trimethylsilyl)methylene)-1,4-xylenylene]. This reaction involves regioselective catalytic addition of the ortho CH bonds of acetophenone across the CC triple bonds of 1,4-bis((trimethylsilyl)ethynyl)benzene such that the hydrogen becomes bonded to the carbon which bears the trimethylsilyl group. A similar ruthenium catalyzed reaction between 1,4-bis((trimethylsilyl)ethynyl)benzene and 2-methylacetophenone has been used to prepare ,-1,4-bis-[-(trimethylsilyl)-2-acetyl-3-methylstyrenyl]benzene, a monomeric compound which possesses the same type of chromophore as the linear polymer. Analogous ruthenium catalyzed reaction of 4-((trimethylsilyl)ethynyl)acetophenone yields a hyperbranched material. All three of these cross-conjugated unsaturated materials have regularly alternating arylene and 1,1-vinylene units....