Ruthenium complexes having an anionic germabenzenyl ligand, [Cp*Ru{η¹,η³-GeC₅(t-Bu)H₄}]₂ (1) and [Cp*Ru{η¹-GeC₅(t-Bu)H₄}{[η¹,η⁵-GeC₅(t-Bu)H₄]RuCp*}₂] (2), have been synthesized by the reaction of germabenzenylpotassium, KGeC₅(t-Bu)H₄, with [Cp*RuCl]₄. Complexes 1 and 2 exhibit both σ- and π-type coordination and can be regarded as the first examples of a transition-metal substituted benzenoid of heavier Group 14 elements. The isolated complexes 1 and 2 have been characterized using NMR and UV-vis spectroscopy, X-ray crystallographic analysis, and theoretical calculations.

中文翻译：

---

阴离子胚芽烯配体的Ru复合物†

具有阴离子配体germabenzenyl钌络合物，混合[Cp *茹{η ¹，η ³ -GeC ₅（吨-Bu）H ₄ }] ₂（1）和混合[Cp *茹{η ¹ -GeC ₅（吨-Bu） ħ ₄ } {[η ¹，η ⁵ -GeC ₅（吨-Bu）H ₄ ] RuCp *} ₂ ]（2），已经由germabenzenylpotassium的反应，合成KGeC ₅（吨-Bu）H ₄，与[Cp * RuCl] ₄。复合体图1和图2均显示出σ型和π型配位，可以视为第14族元素较重的过渡金属取代的苯环的第一个实例。分离的配合物1和2已使用NMR和UV-vis光谱，X射线晶体学分析和理论计算进行了表征。