Sulphur forms hexahalides, tetra halides, dihalides and mono halides. Sulphur forms only hexafluoride but not hexachlorides, hexabromides and hexa iodiades. Sulphur 
halides tend to hydrolyse easily. Sulphur hexafluoride is an exception Of the oxohalides the most important are those of sulphur especially sulphur dichloride oxide (thionyl chloride) SOCl₂ an sulphur dichloride dioxide (sulphuryl chloride) SO₂Cl₂. These also hydrolyse in water