The oxidation state of the metal center is important for a conjugated metallacycle. Although high valent d⁰-metallacycles of main groups and early transition metals have been reported, such examples of late transition metals are limited. The reactions of ReOCl₃(PPh₃)₂ with 2-ethynyl anilines produced alkenyl amino Re(V) complexes, which can be further oxidized to Re(VII) aza-metallacycles. The conjugated rhenacycle is nonaromatic, however, with close to zero NICS values and localized currents observed by AICD and GIMIC studies.

中文翻译：

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具有七价 Re (d0) 中心的氮杂金属环


金属中心的氧化态对于共轭金属环很重要。尽管主族和早期过渡金属的高价d ⁰ -金属环已被报道，但后过渡金属的此类例子是有限的。 ReOCl ₃ (PPh ₃ ) ₂ 与 2-乙炔基苯胺反应生成烯基氨基 Re(V) 络合物，该络合物可进一步氧化为 Re( VII)氮杂金属环。然而，共轭的 rhenacycle 是非芳香族的，AICD 和 GIMIC 研究观察到 NICS 值和局部电流接近于零。