Linear π-conjugated polycyclic compounds consisting of four-, five-, and six-membered rings: benzo[1′′,2′′:3,4;4′′,5′′:3′,4′]bis(cyclobuta[1,2-<i>c</i>]thiophene)
slipped one-dimensional columns. The local and global aromaticity of the newpolycyclic compounds is discussed based on the experimental results and theoretical predictions. The present fundamental findings are useful for the further design and synthesis of novel π-conjugated polycyclic compounds containing four-membered rings with potential applications in electronic materials.
herein report the synthesis and reactivity of an X-shaped molecule featuring three four-membered rings (4MRs) arranged in a ladder configuration. This molecule exhibits a reversible opening and closure of the central 4MR upon exposure to light irradiation and thermal treatment. The central 4MR of this molecule is also cleaved via electrochemical and chemicalreductions. The stimuli-responsiveness of
我们在此报告了一种 X 形分子的合成和反应性,该分子具有以梯形结构排列的三个四元环(4MR)。该分子在暴露于光照射和热处理后表现出中央 4MR 的可逆打开和关闭。该分子的中心 4MR 也通过电化学和化学还原被裂解。 X形分子的刺激响应性归因于其开放状态和闭合状态之间的小能隙差异,这源于其前体的反芳香特性。
The Cobalt-Way to Heterophenylenes: Syntheses of 2-Thianorbiphenylenes, Monoazabiphenylenes, and Linear 1-Aza[3]phenylene {Biphenyleno[2,3-a]cyclobuta[1,2-b]pyridine}
CpCo(CO) 2 catalyzes the cocyclization of ortho-diethynylthiophenes and -pyridines with alkynes to construct the corresponding thia- and azaphenylenes. This strategy is applied to the synthesis of linear 1-aza[3]phenylene, the first higher heterophenylene.