Platinum complexes with N-N-C ligands. Syntheses, electrochemical and spectroscopic characterizations of Pt(II) and electrogenerated, formal Pt(I) species
Articolo
Data di Pubblicazione:
2000
Citazione:
Platinum complexes with N-N-C ligands. Syntheses, electrochemical and spectroscopic characterizations of Pt(II) and electrogenerated, formal Pt(I) species / Sanna, Gavino; Minghetti, G.; Zucca, A.; Seeber, R. AND LASCHI F.. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - 305:(2000), pp. 189-205. [10.1016/S0020-1693(00)00136-5]
Abstract:
A series of cyclometallated platinum(II) species with NNC ligands (NNCortho-C-deprotonated form of 6-benzyl-substituted
2,2%-bipyridines) and different fourth monodentate ligands (Cl, I, CN, CO, PPh3, Py, MeCN) has been investigated
electrochemically, with particular emphasis to the analysis of the relatively stable one-electron reduced species. EPR spectra have
been recorded at different temperatures on the electroreduced solutions. The analyses were supported by a systematic comparison
with simulated spectra and allowed a definition of the interaction of the additional unpaired electron with the 195Pt, 14N, and 1H
nuclei present in the molecule. Attention has been also paid to the effects of the ligands on the thermodynamics (E1:2,r) of the
reduction, as well as to some reactivity aspects of the substrates that could be shown by voltammetric tests. A number of these
compounds have been synthesised for the first time, so that a full characterisation has been performed.
2,2%-bipyridines) and different fourth monodentate ligands (Cl, I, CN, CO, PPh3, Py, MeCN) has been investigated
electrochemically, with particular emphasis to the analysis of the relatively stable one-electron reduced species. EPR spectra have
been recorded at different temperatures on the electroreduced solutions. The analyses were supported by a systematic comparison
with simulated spectra and allowed a definition of the interaction of the additional unpaired electron with the 195Pt, 14N, and 1H
nuclei present in the molecule. Attention has been also paid to the effects of the ligands on the thermodynamics (E1:2,r) of the
reduction, as well as to some reactivity aspects of the substrates that could be shown by voltammetric tests. A number of these
compounds have been synthesised for the first time, so that a full characterisation has been performed.
Tipologia CRIS:
1.1 Articolo in rivista
Keywords:
Platinum complexes; Electrochemistry; Cyclometallated complexes; EPR
Elenco autori:
Sanna, Gavino; Minghetti, G.; Zucca, A.; Seeber, R. AND LASCHI F.
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