Phosphorus nitrogen compounds

Many compounds containing the P-N link can be considered formally as derivatives of the oxoacids of phosphorus and their salts (pp. 510 31) in which there has been isoclcctronic replacement of  

The P-N bond is one of the most intriguing in chemistry and many of its more subtle aspects 

Another scries includes the cyc/o-metaphos-phimic acids, which are tautomers of the cyclo-polyphosphazenc hydroxides (p. 541). Similarly, halogen atoms in PX3 or other P- X compounds can be successively replaced by the isoelcctronic groups -NH , -NHR, -NR2, etc., and sometimes a pair of halogens can be replaced by -= KH Or -NR. These, in turn, can be used to prepare a large number of other derivatives as indicated schematically opposite for P( NMe2).3  

Although such compounds all formally contain P-N single bonds, they frequently display properties consistent with more extensive bonding. A particularly clear example is PE 2(NMe2) 

Many heterocyclic compounds contain formally single-bonded P-N groups, the simplest being the cy io-diphosphazanes (X3PNR)2 and X(0,S)PNR)2. These contain P and have the structures shown in Fig. 12.22. A few 

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H. R. Adcock, Phosphorus—Nitrogen Compounds., Academic Press, Inc., New York, 1972. 

Other Phosphorus—Nitrogen Compounds. Of the binary phosphoms—nitrogen compounds, only triphosphoms pentanitride [12136-91 -3] 3 5 been obtained in a pure state. It can be prepared by treatment of P S q with ammonia and subsequent heating of the intermediate... 

Phosphorus-nitrogen compounds containing alkylated amino groups can be cleaved by fluormatmg agents Phenyldifluorophosphine is formed from the reaction of A,MA, lV -tetramethylphenylphosphonous amide and benzoyl fluoride [79] (equation 17). 

AUcock HR (1972) Phosphorus-nitrogen compounds. Cyclic, linear, and high polymeric systems. Academic, New York... 

Allcock, H, R, "Phosphorus-Nitrogen Compounds", Academic Press New York, 1972 Chapters 15 and 16. 

Allcock, H.R., Phosphorus-Nitrogen Compounds Academic Press New York, 1972 Allen, C.W., "Cyclophosphazenes and Related Compounds" in The Chemistry of Inorganic Rings, Ed. I. Haiduc and D.B. Sowerby, Academic Press, in press. 

Allcock, H. R. (1972). Phosphorus-Nitrogen Compounds. Academic Press, New York. A useful treatment of linear, cyclic, and polymeric phosphorus-nitrogen compounds. 

Allcock, "Phosphorus-Nitrogen Compounds" Academic Press ... 

Allcock, H.R. 1972. Phosphorus-Nitrogen Compounds. Academic Press, New York. 

R.A. Shaw, Aspects of cyclic and acyclic Phosphorus-Nitrogen Compounds, Pure Appl. Chem. 52, 1063 (1980). 

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