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- W2038412402 abstract "The reaction of [Ru(salen)(PPh3)Cl] and the 5-imidazol-substituted nitronyl nitroxide radical (NIT-(5)ImH) yields the [Ru(salen)(PPh3)(NIT-(5)ImH)](ClO4) (1) complex which has been characterized by single crystal X-ray diffraction. This analysis reveals that the Ru(III) ion is coordinated to a tetradentate salen2− ligand in equatorial positions while one PPh3 ligand and one NIT-(5)ImH radical are coordinated in axial positions. This led to RuIII ions in tetragonally elongated octahedral geometry. From the magnetic point of view ferromagnetic intramolecular interaction (J1 = +2.47 cm−1) have been found between the Ru(III) ion and the coordinated NIT-(5)ImH while no significant intermolecular antiferromagnetic interactions are observed at low temperature leading to a ground spin state S = 1. The absence of intermolecular magnetic interaction is explained by considering the crystal packing of (1) where the [Ru(salen)(PPh3)(NIT-(5)ImH)]+ moieties are relatively well isolated. This has to be compared with the situation observed in the previously reported [Ru(salen)(PPh3)-(NIT)]+ compound (2) where ferromagnetic RuIII–NIT interaction were identified and the crystal packing generate intermolecular antiferromagnetic interactions that complicated the study. The analysis of this compound confirms the rather isotropic g values that were found of (2) and of [Ru(salen)(PPh3)(N3)], (3) a radical-free analogue. Moreover it is also a step towards extended structures based on RuIII–NIT moieties since this compound possesses a free bischelating site likely to coordinate additional metallic ions." @default.
- W2038412402 created "2016-06-24" @default.
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- W2038412402 date "2008-09-01" @default.
- W2038412402 modified "2023-09-25" @default.
- W2038412402 title "Rational enhancement of the coordination capability of Ru(III)(salen)-nitronyl nitroxide building block: A step towards 2p–3d–4d magnetic edifices" @default.
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- W2038412402 doi "https://doi.org/10.1016/j.ica.2008.02.047" @default.
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