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Issue 82, 2019
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Electronic and spin delocalization in a switchable trinuclear triphenylene trisemiquinone bridged Ni3 complex

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Abstract

A trinuclear triphenylene trisemiquinone complex containing paramagnetic NiII is obtained under ambient conditions from the reaction of deprotonated tricatecholate hexahydroxytriphenylene (H6HHTP) with NiII capped with a trispyrazolyl borate tridentate ligand. The magnetic and EPR data are consistent with delocalization of the electronic spin over the three NiII species. The two-electron reduced complex shows an EPR spectrum corresponding to a S = 1/2 species due to a large antiferromagnetic coupling between the radical and only one of the NiII ions highlighting the localization of the electronic spin. No EPR signal is observed for the one- and three-electron reduced species consistent with the closed shell of the bridging ligand.

Graphical abstract: Electronic and spin delocalization in a switchable trinuclear triphenylene trisemiquinone bridged Ni3 complex

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Publication details

The article was received on 08 Jul 2019, accepted on 16 Sep 2019 and first published on 17 Sep 2019


Article type: Communication
DOI: 10.1039/C9CC05183J
Chem. Commun., 2019,55, 12336-12339

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    Electronic and spin delocalization in a switchable trinuclear triphenylene trisemiquinone bridged Ni3 complex

    Y. Wang, F. Lambert, E. Rivière, R. Guillot, C. Herrero, A. Tissot, Z. Halime and T. Mallah, Chem. Commun., 2019, 55, 12336
    DOI: 10.1039/C9CC05183J

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