Zusammenfassung
5-Ethynyl-2-furancarboxylic acid and 3-ethynylbenzoic acid self-assemble with [HRu(CO)Cl(PiPr(3))(2)] to form macrocyclic C-3-symmetric triangular triruthenium alkenyl complexes [{Ru(CO)(PiPr(3))(2)(CH=CHArCOO)}(3)] (Ar=C6H4: 1-B, Ar=C4H2O: 1-F), which were characterized by multinuclear NMR spectroscopy, high-resolution ESI mass spectrometry, and, in the case of 1-B, by X-ray crystallography. ...
Zusammenfassung
5-Ethynyl-2-furancarboxylic acid and 3-ethynylbenzoic acid self-assemble with [HRu(CO)Cl(PiPr(3))(2)] to form macrocyclic C-3-symmetric triangular triruthenium alkenyl complexes [{Ru(CO)(PiPr(3))(2)(CH=CHArCOO)}(3)] (Ar=C6H4: 1-B, Ar=C4H2O: 1-F), which were characterized by multinuclear NMR spectroscopy, high-resolution ESI mass spectrometry, and, in the case of 1-B, by X-ray crystallography. Electrochemical studies indicate that the macrocycles are oxidized in three consecutive one-electron steps. The mixed-valent states obtained by electrochemical or chemical oxidation show signs of valence delocalization, which makes these complexes rare examples of molecule-based conductive loops with through-bond charge delocalization.
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