Fink Daniel, Bodensteiner Michael, Linseis Michael, Winter Rainer F
Fachbereich Chemie, Universität Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany.
Fachbereich Chemie und Pharmazie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany.
Chemistry. 2018 Jan 19;24(4):992-996. doi: 10.1002/chem.201705143. Epub 2017 Dec 13.
5-Ethynyl-2-furancarboxylic acid and 3-ethynylbenzoic acid self-assemble with [HRu(CO)Cl(PiPr ) ] to form macrocyclic C -symmetric triangular triruthenium alkenyl complexes [{Ru(CO)(PiPr ) (CH=CHArCOO)} ] (Ar=C H : 1-B, Ar=C H O: 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.
