simple valence isomer, BOT*+, and another one leading to an unprecedented other valence isomer, the anti form of the bicyclo[3.3.0]octa-2,6-diene-4,8-diyl radical cation (anti-BOD*+). The latter product undergoes a very facile H-shift to yield the radical cation of 1,3a-dihydropentalene (1,3a-DHP*+) which ultimately rearrranges by a further H-shift to the observed product, 1,4-DHP*+.
环丁二烯的抗二聚体(抗
三环[4.2.0.0(2.5)] octa-3,7-二烯,TOD)通过在
氟利昂基质中的γ辐射,在烃基质中的脉冲辐射分解以及在解。通过光学和ESR光谱(固相)以及CIDNP光谱(溶液)探测所得物质。从而发现,抗TOD的电离总是导致自发衰变为两种产物,即双环[4.2.0] octa-2,4,7-
三烯(BOT)和1,4-二氢
戊烯(1,4-
DHP),其相对产量在很大程度上取决于实验条件。通过B3LYP / 6-31G *密度泛函方法对
C8H8 * +势能面的探索导致了所观察到的重排的机理假说,其中涉及导致简单化合价异构体BOT * +的途径与另一种途径之间的分歧。导致前所未有的其他化合价异构体,即反式双环[3.3.0] octa-2,6-diene-4,8-diyl自由基阳离子(anti-BOD * +)。后者产物非常容易地发生H位移,从而生成1,3a-二氢
戊烯(1,3a-
DHP