Abstract
Densitometry, UV–Vis and FT IR spectroscopy were used to study the complex formation of cobalt(II) chloride and nickel(II) chloride with diethylsulfoxide (DESO). The apparent molar volumes and partial molar volumes were determined for solvated ions in DESO. The complex formation of nickel(II) and cobalt(II) ions with DESO molecules via oxygen atom of SO group was revealed from the SO stretching band in the FT IR spectra. UV–Vis spectra show the coexistence of two types of complexes with DESO in solution. The results show that solvating ability of DESO is stronger than that of dimethylsulfoxide.
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