Carbenes and nitrenes are key intermediates involved in numerous chemical processes, and they have attracted considerable attention in synthetic chemistry, biochemistry, and materials science. Even though parent arsinidene (H-As) has been characterized well, the high reactivity of subsituted arsinidenes has prohibited their isolation and characterization to date. Here, we report the preparation of triplet phenylarsinidene through the photolysis of phenylarsenic diazide isolated in an argon matrix and its subsequent characterization by infrared and UV/vis spectroscopy. Doping matrices containing phenylarsinidene with molecular oxygen leads to the formation of hitherto unknown anti-dioxyphenylarsine. The latter undergoes isomerization to novel dioxophenylarsine upon 465 nm irradiation. The assignments were validated by isotope-labeling experiments and agree very well with B3LYP/def2-TZVP computations.

中文翻译：

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三重态亚胂亚胺及其氧化成二氧亚胂

卡宾和氮烯是许多化学过程中涉及的关键中间体，它们在合成化学、生物化学和材料科学中引起了相当大的关注。尽管母体胂 (H-As) 已被很好地表征，但取代的胂的高反应性阻碍了它们的分离和表征。在这里，我们报告了通过光解在氩基质中分离的二叠氮苯砷来制备三重态苯亚胂烯，并随后通过红外和紫外/可见光谱对其进行表征。用分子氧掺杂含有苯胂亚胺的基质导致形成迄今未知的抗二氧苯胂。后者在 465 nm 照射下异构化为新型二氧苯胂。