Phosphorus reacts with OF2 to form PF5 and POF3 . Sulfur produces SO2 and SF4 with it . Nonmetals also react : phosphorus reacts with OF2 to form PF5 and POF3 ; sulfur gives SO2 and SF4 ; and unusually for a noble gas , xenon reacts , yielding XeF4 and xenon oxyfluorides .