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 waterSF6 do not hydrolyse in water because of When SOCl2 react with P4 molecule the sulphur containing product formed is