The BIAN ligand 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene: An electron sponge or a „normal“ alpha-diimine ligand?

0467827 - ÚFCH JH 2018 RIV NL eng J - Journal Article
Löw, I. - Bubrin, M. - Paretzki, A. - Fiedler, Jan - Záliš, Stanislav - Kaim, W.
The BIAN ligand 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene: An electron sponge or a „normal“ alpha-diimine ligand?
Inorganica chimica acta. Roč. 455, č. 2 (2017), s. 540-548. ISSN 0020-1693. E-ISSN 1873-3255
R&D Projects: GA MŠMT LD14129
Grant - others:COST(XE) CM1202
Institutional support: RVO:61388955
Keywords : BIAN diimine ligand * Carbonylmetal complexes * Electron transfer
OECD category: Electrochemistry (dry cells, batteries, fuel cells, corrosion metals, electrolysis)
Impact factor: 2.264, year: 2017

The compounds [fac-Re(CO)(3)C1(L)] and [M(CO)(4)(L)], M = Cr, Mo, W and L = 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene, have been studied electrochemically and spectroelectrochemically (IR, UV-vis-NIR, EPR). The neutral rhenium complex contains an isopropyl-shielded chloride ligand. Its reversible oxidation was shown to involve a largely metal-based HOMO. One electron could be added reversibly to the diimine-based LUMO of all complexes, as evident from EPR spectroscopy. However, there was no evidence for the reversible acquisition of more than one electron by L in these complexes, ruling out an electron reservoir functionality with multielectron reactivity. DFT and TD-DFT calculations were performed for the [Re(CO)(3)Cl(L)](n) redox series (n = +, 0, -). (C) 2016 Elsevier B.V. All rights reserved.
Permanent Link: http://hdl.handle.net/11104/0265847