Stable hypervalent bromine(III) compounds were synthesized via aryl bromine oxidation with sp-hybridized nitrogen cations generated by oxime N–O bond cleavage in trifluoroacetic acid. The resulting intramolecular N–Br hypervalent bond is effectively stabilized by the planar xanthone structure. The structures and physicochemical properties of these λ³-bromanes were characterized by X-ray crystallography, cyclic voltammetry, UV-vis spectroscopy, and computational analysis.

中文翻译：

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用含有 sp 杂交氮的路易斯酸原位氧化合成稳定的高价溴 （III） 复合物


通过芳基溴氧化合成稳定的高价溴 （III） 化合物，并在三氟乙酸中通过肟 N-O 键裂解产生的 sp 杂化氮阳离子合成。所得的分子内 N-Br 高价键被平面氧杂蒽酮结构有效稳定。通过 X 射线晶体学、循环伏安法、紫外-可见光谱和计算分析对这些 λ³-溴的结构和物理化学性质进行了表征。