Oxidation State Assignments in the Organoplatinum One-Electron Redox Series [(N boolean AND N)PtMes(2)](n),n= +,0,,2-

0536324 - ÚFCH JH 2021 RIV DE eng J - Journal Article
Bauer, S. - Záliš, Stanislav - Fiedler, Jan - Ringenberg, M. R. - Kaim, W.
Oxidation State Assignments in the Organoplatinum One-Electron Redox Series [(N boolean AND N)PtMes(2)](n),n= +,0,,2-.
European Journal of Inorganic Chemistry. Roč. 2020, č. 25 (2020), s. 2435-2443. ISSN 1434-1948. E-ISSN 1099-0682
Institutional support: RVO:61388955
Keywords : charge-transfer * coordination chemistry * molecular-structure * crystal-structure * active ligands * excited-states * ground-state * bian ligands * complexes * metal
OECD category: Physical chemistry
Impact factor: 2.524, year: 2020
Method of publishing: Open access

The neutral complexes [((NN)-N-^)PtMes(2)], (NN)-N-^= bis(1-methyl-2-imidazolyl)ketone (bik) or N,N'-disubstituted 1,2-bis-iminoacenaphthenes (R-BIAN), Mes = mesityl, were obtained and characterized as Pt(II)species with planar N(2)PtC(2)configuration and charge transfer transitions in the visible. Reversible one-electron reduction produces radical anion complexes with the spin predominantly localized in the (NN)-N-^ ligand, according to EPR, UV/Vis-IR spectroelectrochemistry, DFT and TD-DFT studies. Reversible one-electron oxidation was also possible, attributed to the steric and electronic influence from the mesityl ligands. The EPR silent cation [(bik)PtMes(2)](+)was characterized by UV/Vis-NIR spectroscopy and TD-DFT calculations as a system with spin density contributions from Pt (31 %) and two mesityl groups (69 %).
Permanent Link: http://hdl.handle.net/11104/0314108