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Electrolyte solutions formed by the addition of lithium hexafluorophosphate (LiPF 6 ) and lithium perchlorate (LiC10 4 ) to solvents obtained by mixing ethylene carbonate (EC) with propylene carbonate (PC) and dimethyl carbonate (DMC) were studied. The temperature dependence of conductivity, infrared and Raman spectra of the EC-DMC and PC-EC-DMC solvent electrolytes are discussed. The experimental and theoretical studies of characteristic vibrations of DMC are reported.

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3 ] (CP3), are reported. The far-infrared, infrared and Raman spectra were recorded. The assignment of fundamental vibrational modes is assisted by quantum chemical computations of wavenumbers and Raman and infrared intensities. Fundamental vibrational modes characterized by wavenumber and intensity are identified in the infrared and Raman spectra of the series.