Abstract
From the reaction of M3(CO)12 (M = Ru or Os) with chrysenequinone, trigonal bipyramidal complexes [M(CO)3(ChryQ)] were isolated. Vibrational spectra of the two complexes display three CO stretching frequencies in the terminal metal carbonyl region and strong v(CO) frequency at 1665 cm−1 due to the quinone. Investigation of the complexes by electronic, 1H and l3C NMR spectros copy confirmed the proposed structure. Cyclic voltammograms of chrysenequinone show two quasi-reversible redox reactions due to a tautomeric change to semiquinone and catecholate derivatives. Cyclic voltammograms of the ruthenim complex show irreversible behaviour, presumably to oxidation of the metal.
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