Metal-Dithiolenes of Disubstituted Imidazolidine-2,4,5-trithione Monoanion. An Electrochemical and EPR Study

The electrochemical properties of a series of &[M(R,R’timdt)2&] dithiolenes (M = Ni, Pd, Pt; R,R’timdt = monoanion of disubstituted imidazolidine-2,4,5-trithione) have been studied by cyclic voltammetry, controlled potential coulometry, and EPR spectroscopy. All the compounds undergo two separate one-electron reductions and one two-electron oxidation, which proceed through a single step in the case of nickel complexes, and through two separate steps in the case of palladium and platinum complexes. Inductive effects played by the R and R’ substituents influence the formal electrode potentials of the electron transfer processes. EPR spectroscopy has proved that the unpaired electron in monoanions [M(R,R’timdt)2]- is located on a SOMO, which, even if mainly ligand centred, is significantly contributed by the metal.

Bibliographic Details

Main Authors:	Grigiotti,E., Laschi,F., Zanello,P., Arca,M., Denotti,C., Devillanova,F.A.
Format:	Digital revista
Language:	English
Published:	Sociedade Portuguesa de Electroquímica 2004
Online Access:	http://scielo.pt/scielo.php?script=sci_arttext&pid=S0872-19042004000100004
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