Flash Vacuum Thermolysis of Acenaphtho[1,2-a]acenaphthylene, Fluoranthene, Benzo[k]- and Benzo[j]fluoranthene – Homolytic Scission of Carbon-Carbon Single Bonds of Internally Fused Cyclopenta Moieties atT ≥ 1100 °C
作者:Martin Sarobe、Huibert C. Kwint、Theun Fleer、Remco W. A. Havenith、Leonardus W. Jenneskens、Edward J. Vlietstra、Joop H. van Lenthe、Jolanda Wesseling
DOI:10.1002/(sici)1099-0690(199905)1999:5<1191::aid-ejoc1191>3.0.co;2-w
日期:1999.5
undergoes homolytic scission of a five-membered ring's Carbon-Carbon single bond furnishing the transient diradical intermediate 7. Ring closure of 7to form 8 after rotation around the Carbon-Carbon single bond of the intact five-membered ring followed by hydrogen shifts will give 6. The latter can rearrange subsequently into 5by ring contraction/ring expansion. The structural assignment of 4 and 5 was supported
苊[1,2-a]苊(3,C22H12)的快速真空热解(FVT,1000°C ≥ T ≥ 1200°C)得到C22H12环戊基稠合多环芳烃(CP-PAH)苊[1,2 -e]苊(4)、环戊[cd]苝(5)和环戊[def]苯并[hi]芘(6)。虽然 4 的形成是通过 3 的环收缩/环膨胀重排来解释的,但 5 和 6 的识别表明 3 也经历了五元环碳-碳单键的均裂断裂,提供了瞬态双自由基中间体 7。围绕完整五元环的碳-碳单键旋转后,7 的闭合形成 8,然后发生氢位移,得到 6。后者可以通过环收缩/环膨胀重新排列成 5。4 和 5 的结构分配分别由 6,12-双(1-氯乙烯)苝(14)和 3-(1-氯乙烯)苝(23)的独立 FVT 支持。14 (900–1200 °C) 的 FVT 在连续过程中得到 6,12-双(乙炔基)芘(15)、9-乙炔基苯并 [j] 乙酰菲(16)和双(环戊基 [hi,qr])芘(