|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)
Dispiro[188.8.131.52]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[184.108.40.206]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[220.127.116.11]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.