Potassium tris(oxalato)ruthenate (III)

Add time:07/18/2019    Source:sciencedirect.com

The structure of the title compound has been found by single-crystal X-ray analysis to be a 4.5 hydrate, isomorphous with the rhodium and iridium analogs (triclinic space group P1, a = 6.813(5),b = 10.519(1), c = 12.470(2) Å, α = 76.28(1)°, β = 84.26(1)°, γ = 85.60(1)°, Z = 2). The structure was refined to a conventional R value of 0.025 by using 2271 significant reflections. The structure contains the expected tris-bidentate oxalatoruthenate(III) anion with an average RuO bond length of 2.028(7) Å. Two methods of preparing this salt free of chloride ions are described. The powder diffraction pattern is tabulated with the three most intense lines of 6.05(100), 13.62(46), and 3.033(38) Å. The reduction potential was measured by cyclic voltammetry to be −0.456 V, which differs from that previously reported.

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