Thionyl chloride and sulfuryl chloride have structures in which the oxygen and halogen atoms are
attached to the sulfur. Even though the formulas are often shown as SOCl 2 and SO 2Cl 2, they are cor-rectly shown as OSCl 2 and O 2 SCl 2. These molecules have C s and C2v symmetry, respectively. Thionyl
chloride can be prepared by chlorinating SO 2 ,