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

Sanna, Gavino and Minghetti, Giovanni and Zucca, Antonio and Pilo, Maria Itria and Seeber, Renato and Laschi, Franco (2000) Platinum complexes with N---N---C ligands: syntheses, electrochemical and spectroscopic characterisations of platinum(II) and relevant electroreduced species. Inorganica Chimica Acta, Vol. 305 (2), p. 189-205. ISSN 0020-1693. Article.

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DOI: 10.1016/S0020-1693(00)00136-5

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 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.

Item Type:Article
ID Code:3677
Status:Published
Refereed:Yes
Uncontrolled Keywords:Platinum complexes, electrochemistry, cyclometallated complexes, EPR
Subjects:Area 03 - Scienze chimiche > CHIM/03 Chimica generale e inorganica
Area 03 - Scienze chimiche > CHIM/01 Chimica analitica
Divisions:001 Università di Sassari > 01 Dipartimenti > Chimica
Publisher:Elsevier
ISSN:0020-1693
Deposited On:02 Apr 2010 12:04

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