Phosphorus-Oxygen-Nitrogen Compounds

Phosphorus-Oxygen-Nitrogen Compounds. The alkaline hydrolysis of diphenyl-amidophosphate occurs by a bimolecular addition of hydroxide ion at phosphorus. 

The hydrolysis of triamido-, diamido-, and monoamido-phosphoric acid has been studied. The triamido-compound reacts by both acid- and base-catalysed mechanisms, and also exhibits spontaneous hydrolysis in the pH range 7—8. The diamido-and monoamido-compounds react by an acid-catalysed pathway, though the dependence of rate upon pH is complicated by zwitterion formation. The reaction of A-(4-chlorophenyl)phosphoramidate anion, [ArNHPOsH]-, in hydroxylamine buffers involves a common intermediate for hydrolysis and hydroxylaminolysis. This is described as a solvated dipole pair, derived from a zwitterion  

Mollin, F. Veverka, and F. Kaspdrek, Coll. Czech. Chem. Comm, 1976, 41, 3245. 

Miscellaneous Compounds. Nucleophilic substitution of Bu Li with optically active PhArPMe (Ar=4-Bu C6H4) gives displacement of Ph and Ar in the ratio 1.4 1. There is complete inversion of configuration in each case, and no evidence for any pseudorotation. A classical Sn2 reaction is suggested rather than a mechanism involving a five-co-ordinate intermediate. Hydroxyphosphoranes have been postulated as transient intermediates in the reaction of hydroxide ions with four-co-ordinate phosphorus compounds. A crystalline compound which may have such a structure, (16), has been isolated. In solution it exists in dynamic equilibrium with (17). 

The dialkylaminophosphines seemi to be comparable in reactivity to the tributyl-phosphines. The reactivity does not seem to be much affected by interac- 

---

Phosphorus.—Reactions of oxoanions and related species, phosphorus-oxygen-nitrogen compounds, phosphazanes, and other components and intramolecular processes are considered in this section. 

The nutrient distribution in the deepwaters of the central basins of the Baltic Sea is mainly determined by inflow events and stagnation periods characterized by strong variations in oxygen conditions. The general behavior of inorganic phosphorus and nitrogen compounds in the deep basins below the halocline and their reaction to Major Baltic Inflows (MBIs) is described in Chapter 10.6.2. In this chapter, the interaction between nutrients accumulated below the halocline and their influence on the surface layer and thus on eutrophication processes is studied in more detail. 

Many compounds of phosphorus, oxygen, nitrogen and hydrogen have now been reported but the picture as to which species can exist has still not been made completely clear. No doubt it will include many polymeric varieties. 

In a few instances, the introduction of fluorine into certain compounds containing oxygen, nitrogen, or phosphorus increases the toxicity of such compounds to a spectacular degree. 

Naturally-occurring oil, a mixture of hydrocarbons with a small proportion of other organic compounds containing sulphur, phosphorus, oxygen and nitrogen the exact composition varies according to source. Petroleum Oils... 

The great number of compounds of boron is due to the readiness with which boion atoms fonn, to some extent, chain structures with other boion atoms, and, to a far greater extent, cyclic compounds, both with other boron atoms, mid with atoms of carbon, oxygen, nitrogen, phosphorus, arsenic, the halogens, and many other elements. Examples of Lhcm arc shown below, beginning with the two pentaboranes B5 Hc> and Bs Hu ... 

---