Phosphorus v Halides

A. From Amides and Phosphorus(v) Halides.—The Kirsanov reaction remains one of the most important routes to acyclic phosphazenes some recent examples of this reaction are summarized below ... 

B. From Cyano-compounds and Phosphorus(v) Halides.—Continued reports of the reactions of alkyl cyanides with phosphorus pentachloride appear. With dicyanides the formation of phosphazenes occurs via a series of intermediates whose stability varies with the nature of X ... 

Phosphorus Halides Phosphorus reacts with all the halogens, forming phospho-rus(III) halides, PX3, or phosphorus(V) halides, PX5 (X = F, Cl, Br, or I), depending on the relative amounts of the reactants ... 

With mixed phosphorus(V) halides, similar reactions occur [900,903] ... 

Haszeldine and Iserson have also speculated [899,903] that various tetrahalomethanes can be prepared from the reactions of COBrF with phosphorus(V) halides, analogous to the reaction of phosgene with PClj to give CCl and POCI3. For example ... 

From Amides and Phosphorus(v) Halides.—Aminodifluorophosphine, FgP NHz, which was only recently reported, has been shown to undergo the Kirsanov reaction, giving an iV-phosphinophosphazene, of which there are few examples known ... 

From Cyano-compounds and Phosphorus(v) Halides.—The products from the reactions of acetonitrile and chloroacetonitriles with phosphorus pentachloride have been re-examined. The formation of compounds of structure (4) from the reaction with acetonitriles is confirmed, as well as the intermediates (5), but there was no evidence for the existence of cis-and trans-isomers of (4) or (5) (X = H) as previously postulated. The... 

Mechanisms have been proposed for the reactions of phosphorus(v) halides with sulphuric acid, chlorosulphonic acid, fluorosulphonic acid, and 25% and... 

The amminolysis of phosphorus (V) halides leads to a class of inorganic materials known as phosphazenes which are characterized by the repeating (R2P=N) unit. The presence of two elements active in flame retardancy (phosphorus, nitrogen) which may behave in a synergistic manner makes phosphazenes particularly attractive in this important application. 

Pb(C2H5)4 ethylates phosphorus(lll) and phosphorus(V) halides, as well as organophos-phorus halide compounds. The reaction may be catalyzed by Lewis acids. The ethylation can be done stepwise, and therefore allows the synthesis of tertiary phosphines containing three different organic groups [104, 105]. The reactions with various phosphorus(lll) compounds (Nos. 1 to 13) and phosphorus(V) compounds (Nos. 14 to 35) are summarized in Table 14. Further reactions are given at the end of the table. 

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