Pentamethylcyclopentadienylruthenium complexes: IV. Pentamethylcyclopentadienyl(halo)ruthenium(III, II/II, or II), and pentamethylcyclopentadienyl(alkoxo)ruthenium(II) complexes☆

Add time:08/26/2019    Source:sciencedirect.com

Treatment of [Cp*RuCl2]2 (1a) (Cp* = η5-C5Me5) with NaBr KI leads to the complexes [Cp*RuBr2]2 (1b) and [Cp*RuI2]2 1c). Reduction of these RuIII halides with cobaltocene gives pentane-soluble, paramagnetic, molecular mixed valence RuIII/II complexes [Cp*Ru(μ-X)3RuCp*] (3a, 3b, 3c) and on further reduction Cp*RuII halides [Cp*RuX]n (4a, 4b, 4c, X = Cl, Br, I).Treatment of 1a with alcohol in the presence of K2CO3 gives the RuII alkoxo complexes [CpRuOR]2 (16a–16d; R = CH3, C2H5, C3H7, C4H9). 16a gives a 4a upon treatment with Me3SiCl. The spectroscopic charactristics, physical properties and cleavage and complexation reactions of the halo and alkoxo complexes are described.

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