| Budget Amount *help |
¥4,150,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥450,000)
Fiscal Year 2007: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2006: ¥2,200,000 (Direct Cost: ¥2,200,000)
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| Research Abstract |
Cationic ring-opening polymerizations of [3.3.1] propellane derivatives, 1, 3-dehydroadamantane (1), 5-butyl-1, 3-dehydroadamantane (2), and 6-butyl-6-methyl-1, 3-dehydroadamantane (3) were carried out with CF_3SO_3H in CH_2 Cl_2 at 0℃ for 6-42 h. The central a-bonds in 1-3 were exclusively opened to afford novel poly ([3.3.1]propellane)s, poly(1, 3-adamantane)s, in good to quantitative yields. The resulting poly (2) and poly (3) possessing flexible butyl substituents were soluble in chloroform, THF, and 1, 2-dichlorobenzene, and the degree of polymerization was estimated to be greater than 30, while the poly (1) was hardly soluble in the common organic solvents. All aliphatic poly (1, 3-adamantane) s showed high thermal stability, whose 10% weight loss temperatures were over 430℃. 1, 3-Dehydroadamantanes underwent the spontaneous copolymerization with acrylonitrile or methyl acrylate to afford the alternating copolymer, indicating the high electron-density.
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