The Conductance, Cyclic Voltammetric, and Infrared Spectral Studies of Electrolytes in Dimethyl Sulfoxide

The conductance, cyclic voltammetry, and infrared spectra of LiAsF 6 , LiPF 6 , and LiBF 4 in dimethyl sulfoxide have been measured. From conductance data, information on optimum concentration of the electrolyte for maximum conductance as well as the formation of ion pairs and triple ions has been obtained. The cyclic voltammograms of these solutions have been used to establish their electrochemical stability and to study the electrochemical behavior of trace amounts of water in these solutions. The infrared spectra of dimethyl sulfoxide and the solutions of LiAsF 6 , LiPF 6 , and LiBF 4 in dimethyl sulfoxide have been obtained. The changes observed in the spectra of electrolyte solutions have been interpreted in terms of ion‐solvent interactions.