Reactions with Halogens and Chloramines

Phosphine bums to PCls and hydrogen chloride in a chlorine atmosphere 311,313) aqueous chlorine solution oxidises PH3 to phosphoric acid (see also Section IV.7).  

Royen and Hill reported that phosphonium bromide and solid phosphorus hydride are the products from the reaction of excess phosphine with bromine at low temperatures. 

From iodine and dry phosphine, P2I4 and hydrogen iodide, which reacts with excess phosphine to form phosphonium iodide, are formed.  

In aqueous solution iodine reacts with phosphine according to the empirical formula (30) to form phosphorous acid and hydrogen iodide  

According to earlier work hypophosphorous acid should be formed according to Eq. (31)  

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