The structures and chemical bonding of Ge₃C^– and Ge₃O^– as well as their neutrals are explored with anion photoelectron spectroscopy and theoretical calculations. The vertical detachment energies of Ge₃C^– and Ge₃O^– are measured to be 1.51 ± 0.04 and 2.00 ± 0.04 eV, respectively. It is found that Ge₃C^–/0 have a C_2v symmetric planar structure with the C atom interacting with three Ge atoms. Ge₃O^–/0 have the O atom interacting with two Ge atoms of the triangular Ge₃ unit. Ge₃O^– has a C_s symmetric nonplanar structure, while Ge₃O has a C_2v symmetric planar structure. Theoretical results show that the multiconfigurational effects in Ge₃C^–/0 and Ge₃O^–/0 are insignificant. Chemical bonding analyses reveal that there exist the C–Ge₃ π_⊥ orbital interaction and two π aromatic Ge₂C units in Ge₃C. There are O–Ge₃ π_⊥ orbital interaction and one doubly aromatic Ge₃ unit in Ge₃O, but the π_⊥ orbital interaction is relatively weak.

中文翻译：

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通过光电子能谱和理论计算观察 Ge3C 和 Ge3O 中的芳香族三元环

的结构和锗的化学结合₃ Ç ^-和Ge ₃ ö ^-以及它们的中性进行了探索与阴离子光电子能谱和理论计算。Ge ₃ C ^-和 Ge ₃ O ^-的垂直分离能分别测量为 1.51 ± 0.04 和 2.00 ± 0.04 eV。发现Ge ₃ C ^–/0具有C _{2 v}对称平面结构，其中C 原子与三个Ge 原子相互作用。Ge ₃ O ^–/0使 O 原子与三角形 Ge _{3 的}两个 Ge 原子相互作用单元。Ge ₃ O ^–具有C _s对称非平面结构，而Ge ₃ O 具有C _{2 v}对称平面结构。理论结果表明Ge ₃ C ^–/0和Ge ₃ O ^–/0中的多构型效应不显着。化学结合的分析表明，存在的C-戈₃ π _⊥轨道相互作用和两个π芳香戈₂ C单位中的Ge ₃ C.有O型戈₃ π _⊥轨道相互作用和一个双芳族的Ge ₃Ge ₃ O 中的单元，但 π _⊥轨道相互作用相对较弱。