A series of ruthenaindene complexes containing electron-donating and -withdrawing groups were synthesized and characterized. The ruthenaindenes were synthesized from ruthenium butenynyl complexes which were formed by the treatment of Me₂Ru(PMe₃)₄ with 1,4-diaryl-1,3-butadiynes in methanol. Electrochemistry of the metal center in ruthenaindenes showed that the complexes with electron-donating groups on the aromatic ring have significantly lower oxidation potentials in comparison to complexes with electron-withdrawing groups. Even though the substitution of the aromatic ring with electron-donating/-withdrawing groups is remote from the metal center, the electronic properties of the substituents are relayed effectively to the metal center, indicating that the metal center in the ruthenaindenes is quite intimately embedded into the organic aromatic framework.

中文翻译：

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含电子丰富和电子贫乏取代基的功能改变的钌茚

合成并表征了一系列含有供电子和吸电子基团的钌钌茚配合物。钌基茚满是由钌丁烯基配合物合成的，后者是通过对Me ₂ Ru（PMe ₃）₄的处理而形成的。含1,4-二芳基-1,3-丁二炔的甲醇溶液。钌-茚的金属中心的电化学表明，与具有吸电子基团的配合物相比，在芳环上具有给电子基团的配合物具有明显更低的氧化电位。即使芳族环被给电子/吸电子基团取代是远离金属中心，但取代基的电子性质仍有效地传递至金属中心，这表明钌金属茚中的金属中心已非常紧密地嵌入其中有机芳香框架。