Electrochemical study of (NEt4)2Cl2FeS2MoS2 and (NEt4)2Cl2FeS2MoS2FeCl2 |
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Authors: | Paul-Louis Fabre Dominique de Montauzon René Poilblanc |
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Institution: | (1) Laboratoire de Chimie de Coordination du CNRS, Unité no 8241 liée par convention à l'Université Paul Sabatier, 205 route de Narbonne, 31077 Toulouse Cedex, France |
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Abstract: | Summary The ability of MoS4]2–, anions to be used as ligands for transition metal ions has been widely demonstrated, especially with Fe2+. The present study has been restricted to linear complexes such as (NEt4)2 Cl2FeS2MoS2] and (NEt4)2Cl2FeS2MoS2FeCl2]. Their electrochemical properties are described: upon electrochemical reduction, these compounds yield MoS2, as a black precipitate, and an iron complex in solution, assumed to be SFeCl2]2–. The electrochemical reduction goes through two electron transfers, coupled with the breakdown of the molecular skeleton: a DISPl and an ECE mechanism. Depending on the solvent, the following equilibrium may be observed: Cl4Fe2MoS4]2–Cl2FeMoS4]2–+FeCl2. The equilibrium constant, KD, was evaluated by differential pulse polarography. KD is tightly related to the donor number of the solvent. |
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