| Budget Amount *help |
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 1992: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1991: ¥2,500,000 (Direct Cost: ¥2,500,000)
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| Research Abstract |
Dispiro[2.2.2.2]deca-4,9-diene was subjected to vapor phase pyrolysis above 450ﾟC, and the pyrolyzed gas was condensed on a glass surface at 20ﾟC to give poly(1,4-phenylene-1,2-dimethylethylene) as a colorless transparent film in 10-20% yield. The pyrolyzed product of dispiro[2.2.2.2]deca-4,9-diene was absorbed in hexane at -78ﾟC, and the solution was reacted with chlorine at -78ﾟC to yield 1,4-bis(1-chloroethyl) benzene, supporting the diradical intermediate, 2,2'-(1,4-phenylene) diethyl diradical, generated in the vapor phase pyrolysis of dispiro[2.2.2.2]deca-4,9-diene is subject to isomerization to give 7,8-dimethyl-1,4-benzoquinodimethane which, when condensed, polymerized spontaneously to give the film of poly(1,4-phenylene-1,2-dimethylethylene). This result was thought to be the first case for ring-opening and isomerization polymerization of dispiropropane compound.
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