Sulfur difluoride is an inorganic compound with the chemical formula SF₂. It can be generated by the reaction of sulfur dichloride and potassium fluoride or mercury(II) fluoride at low pressures: SCl₂ + 2 KF → SF₂ + 2 KCl SCl₂ + HgF₂ → SF₂ + HgCl₂... Wikipedia