While sp2-hybridized carbon atoms in hydrocarbons typically contribute only one electron to their aromaticity, metals have more electrons from d or f orbitals available for participating in conjugation in organometallics, complicating the electron counting as well as analysis of their aromaticity. Here, the author comments on the challenges towards understanding aromaticity in organometallics and outlines several remaining questions that have yet to be answered.

中文翻译：

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关于有机金属化合物芳香性的开放性问题

虽然碳氢化合物中的 sp2 杂化碳原子通常只为其芳香性贡献一个电子，但金属有更多来自 d 或 f 轨道的电子可用于参与有机金属化合物的共轭，使电子计数及其芳香性分析复杂化。在这里，作者评论了理解有机金属化合物中芳香性的挑战，并概述了几个尚待回答的剩余问题。