Stable planar dithienoarsinines were synthesized and structurally characterized. These compounds exhibit monomeric structures in the solution and solid states, avoiding dimerization, even in the absence of steric protection. They exhibited high global aromaticity with 14 or 22π-electron systems. In the solid state, intermolecular interactions through arsenic atoms were observed, and As···As interactions resulted in aggregation-induced emission enhancement properties with a significant bathochromic shift. The W(CO)5 complex displayed a significantly distorted coordination geometry owing to arsenic cooperative stacking and hydrogen interactions, resulting in a 1D alignment of the complex. Additionally, despite their aromatic nature, dithienoarsinines undergo reactions with alkynes or benzynes to form the corresponding [4+2] cycloadducts. Oxygen molecules oxidize the p-position of arsinine, leading to the formation of σ-dimerized compounds while retaining the aromaticity of the arsinine ring. In contrast, oxygen attacks the phosphorus atom in phosphinine, resulting in the formation of phosphinic acid with a loss of aromaticity.

中文翻译：

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二噻吩砷烯：稳定和刨π延砷苯


合成了稳定的平面二噻吩砲并进行了结构表征。这些化合物在溶液和固态中表现出单体结构，即使在没有空间保护的情况下也能避免二聚化。它们在 14 或 22π 电子系统中表现出高全局芳香性。在固态下，观察到通过砷原子的分子间相互作用，并且 As···As 相互作用导致聚集诱导的发射增强特性，具有显着的深变色偏移。由于砷协同堆叠和氢相互作用，W（CO）5 配合物显示出明显扭曲的配位几何结构，导致配合物的 1D 对齐。此外，尽管具有芳香性质，但二噻吩砷宁与炔烃或苄炔反应形成相应的 [4+2] 环加合物。氧分子氧化砷氨酸的 p 位，导致形成 σ-二聚化化合物，同时保留砷氨酸环的芳香性。相反，氧攻击膦中的磷原子，导致形成膦酸，但芳香性丧失。