[en] Variable angle, electron-impact energy-loss spectra of CS₂, OCS, and SO₂ have been obtained at incident electron energies of 25, 40, and 70 eV for CS₂, and 30 and 55 eV for OCS and SO₂. Singlet→triplet excitations are observed with peaks at transition energies of 3.36 eV in CS₂, 4.94 eV in OCS, and 3.40 eV in SO₂. A feature which peaks at 3.65 eV in CS₂ is observed to have singlet→triplet character. The CS₂ and OCS spectra do not confirm the existence of several spin-forbidden transitions reported in solid phase ultraviolet absorption studies of these molecules. In SO₂, no evidence is found of transitions to the 1 ³A₂ and 1 ³B₂ states, believed to lie near the well-known a ³B₁ state