compound 2 as observed by IR spectroscopy and on-line mass spectrometry. FVT of 8 at 600–800°C causes rearrangement of 11 to phenylacetylene 12 and benzocyclobutadiene 13. Mechanisms for the rearrangements are proposed. Facile rearrangement of benzocyclobutadiene to phenylacetylene is ascribed to chemical activation, which is also seen to be involved in the rearrangement of p-, m-, and o-phenylenebiscarbenes
亚
甲基环庚二
烯炔11(庚
富烯)是通过在400°C下重
氮重
氮苯并环丁烯前体8的快速真空热解(FVT)干净地得到的,然后在77 K或7-10 K的Ar基质中分离为纯净固体。化合物11为黄色固体,在纯净状态下稳定到〜–100°C。
甲苯磺酰to盐1在115℃下温和分解后,重
氮化合物本身(2)可通过IR光谱观察。如通过IR光谱和在线质谱法所观察到的,在200℃下的FVT为8还产生重
氮化合物2。FVT在600–800°C时为8,会导致11重排为
苯乙炔12和
苯并
环丁二烯13。提出了用于重排的机制。到
苯乙炔苯并
环丁二烯的重排容易归因于
化学活化,这也被视为参与的重排对- ,米-和邻- phenylenebiscarbenes 25 - 27至
苯乙炔12。