A series of cyclometallated platinum(II) species with N-N-C ligands (N-N-C = ortho-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 st;able 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 Pt-195, N-14, and H-1 nuclei present in the molecule. Attention has been also paid to the effects of the ligands on the thermodynamics (E-1/2,E-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. (C) 2000 Elsevier Science S.A. All rights reserved.

Platinum complexes with N-N-C ligands. Syntheses, electrochemical and spectroscopic characterisations of platinum(II) and relevant electroreduced species / G., Sanna; G., Minghetti; A., Zucca; Seeber, Renato; Mi, Pilo; F., Laschi. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - STAMPA. - 305(2000), pp. 189-205. [10.1016/S0020-1693(00)00136-5]

Platinum complexes with N-N-C ligands. Syntheses, electrochemical and spectroscopic characterisations of platinum(II) and relevant electroreduced species

SEEBER, Renato;
2000

Abstract

A series of cyclometallated platinum(II) species with N-N-C ligands (N-N-C = ortho-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 st;able 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 Pt-195, N-14, and H-1 nuclei present in the molecule. Attention has been also paid to the effects of the ligands on the thermodynamics (E-1/2,E-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. (C) 2000 Elsevier Science S.A. All rights reserved.
305
189
205
Platinum complexes with N-N-C ligands. Syntheses, electrochemical and spectroscopic characterisations of platinum(II) and relevant electroreduced species / G., Sanna; G., Minghetti; A., Zucca; Seeber, Renato; Mi, Pilo; F., Laschi. - In: INORGANICA CHIMICA ACTA. - ISSN 0020-1693. - STAMPA. - 305(2000), pp. 189-205. [10.1016/S0020-1693(00)00136-5]
G., Sanna; G., Minghetti; A., Zucca; Seeber, Renato; Mi, Pilo; F., Laschi
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11380/304827
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