During the past several years compounds containing P-N bonds have been the object of a number of investigations,2many of them motivated by the conjecture that pπ-dπ bonds can form between these two atoms. Recently the behavior of the halophosphonitriles,3–6whose bonding is thought to involve extensive pπ-dπ delocalization,7and the aminohalo-phosphines,8which contain only a single P-N fragment, toward electron bombardment has been described. Since the framework over which π bonding can occur in the hydrazino- and hydroxylaminohalophosphines9is intermediate between these other two classes of compounds we would like to report comparable studies for these latter compounds.