1. Coordination of di- and triimine ligands at ruthenium(II) and ruthenium(III) centers: structural, electrochemical and radical scavenging studies.
- Author
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Booysen, Irvin N., Adebisi, Abimbola, Akerman, Matthew P., Munro, Orde Q., and Xulu, Bheki
- Subjects
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IMINES , *LIGANDS (Chemistry) , *COORDINATE covalent bond , *ELECTROCHEMICAL analysis , *NUCLEAR magnetic resonance spectroscopy ,RUTHENIUM isotopes - Abstract
Herein, we explore the coordination of di- and triimine chelators at ruthenium(II) and ruthenium(III) centers. The reactions of 2,6-bis-((4-tetrahydropyranimino)methyl)pyridine (thppy),N1,N2-bis((3-chromone)methylene)benzene-1,2-diamine (chb), andtris-((1H-pyrrol-2-ylmethylene)ethane)amine (H3pym) withtrans-[RuIICl2(PPh3)3] afforded the diamagnetic ruthenium(II) complexcis-[RuCl2(thppy)(PPh3)] (1) and the paramagnetic complexes [mer-Ru2(μ-chb)Cl6(PPh3)2] (2), and [Ru(pym)] (3), respectively. The complexes were characterized by IR, NMR, and UV–vis spectroscopy and molar conductivity measurements. The structures were confirmed by single crystal X-ray diffraction studies. The redox properties of the metal complexes were probed via cyclic- and squarewave voltammetry. Finally, the radical scavenging capabilities of the metal complexes towards the NO and 2,2-di(4-tert-octylphenyl)-1-picrylhydrazyl (DPPH) radicals were investigated [ABSTRACT FROM AUTHOR]
- Published
- 2016
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