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Synthesis, structure and redox properties of (μ-oxo)bis(μ-carboxylato)diruthenium(III) complexes containing three different terminal ligands

Authors
Journal
Polyhedron
0277-5387
Publisher
Elsevier
Publication Date
Volume
12
Issue
3
Identifiers
DOI: 10.1016/s0277-5387(00)81723-4

Abstract

Abstract Blue coloured, unstable, essentially diamagnetic and non-electrolytic diruthenium(III) complexes of the formation [Ru 2O(O 2CR) 4(en) 2(PPh 3) 2] were prepared by reacting [Ru 2O(O 2CR) 4(PPh 3) 2] with 1,2-diaminoethane (en) in CH 2Cl 2 (R = C 6H 4- p-X; X = H, Me and OMe). The molecular structure of the complexes is proposed as [{(η 1-O 2CR)(η 1-en)(PPH 3)Ru} 2(μ-O)(μ-O 2CR) 2] based on the 1H NMR spectral data. The electronic spectra of the complexes display a band near 569 nm with a shoulder at 630 nm. In CH 2Cl 2-0.1 M [Bu n 4N]ClO 4, the complexes exhibit redox couples Ru 2 III,III/Ru 2 III,IV and Ru 2 III,IV/Ru 2 IV,IV near 0.1 and 1.2 V (vs SCE), respectively. The potentials are the lowest among diruthenium(III) complexes with a similar core structure.

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