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Ruthenium Carbon-Rich Complexes as Redox Switchable Metal Coupling Units

Abstract : With the help of EPR spectroscopy, we show that the diamagnetic [Ru(dppe)2(-C≡C-R)2] system sets up a magnetic coupling between two organic radicals R, i.e., two nitronyl nitroxide or two verdazyl units, which is stronger than that of related platinum organometallic systems. Surprisingly, further oxidation of the ruthenium redox-active metal coupling unit (MCU), which introduces an additional spin unit on the carbon-rich part, leads to the switching off of this interaction. On the contrary, in simpler complexes bearing only one of the organic radical ligands [C6H5-C≡C-Ru(dppe)2-C≡C-R], one-electron oxidation of the transition metal unit generates an interaction between the two spin carriers of comparable magnitude to that observed in the above corresponding neutral systems.
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01166769
Contributor : Laurent Jonchère <>
Submitted on : Tuesday, June 23, 2015 - 10:57:02 AM
Last modification on : Thursday, March 5, 2020 - 2:03:12 PM

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Emmanuel Di Piazza, Areej Merhi, Lucie Norel, Stéphane Rigaut, Sylvie Choua, et al.. Ruthenium Carbon-Rich Complexes as Redox Switchable Metal Coupling Units. Inorganic Chemistry, American Chemical Society, 2015, 54 (13), pp.6347-6355. ⟨10.1021/acs.inorgchem.5b00667⟩. ⟨hal-01166769⟩

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