Inner and valence shell electronic excitation of dimethyl sulfoxide by electron energy loss and photoabsorption spectroscopies

The electronic excitation spectra of all inner shells and the valence shell of dimethyl sulfoxide (DMSO) have been measured using electron energy loss spectroscopy (S 2s, 2p, O 1s, C 1s and valence shell) and synchrotron radiation photoabsorption (S 1s). The spectra in the pre-edge regions are interpreted as excitations to virtual valence and Rydberg orbitals. A linear correlation between the SC bond lengths and the term values of S 2p32 → σ* (SC) transitions is demonstrated for DMSO and other sulfur compounds.