Phosphonitrilics

Phosphonitrilic chloride (tetramer) [1832-07-1 ] M 463.9. Purified by zone melting, then crystd from pet ether (b 40-60°) or n-hexane. [van der Huizen et al. J Chem Soc, Dalton Trans 1317 1986.]... 

Substituted poly(phosphonitrilic chloride) Eypel F Ethyl Corporation ... 

In general the nitroso rubbers also suffer from a poor resistanee to ionising radiation, sensitivity to degradation by organie bases, highly toxic degradation products and an exceptionally high cost. The advent of the rubbers based on perfluorofmethyl vinyl ether) considered above and of the phosphonitrilic elastomers considered below would appear to put the commercial future of these materials in extreme doubt. 

Phosphonitrilic chloride (NPCIift prepared by J. von Liebig by heating NHi or NH4CI with PCI5. 

PCI5 chlorinates alcohols to alkyl halides and carboxylic acids to the corresponding RCOCl. When heated with NH4CI the phosphonitrilic chlorides are obtained (p. 536). These and other reactions are summarized in the diagram. 

The aromaticity of such inorganic ring systems as borazine, the phosphonitrilic halides (69), and the thiazyl halides (70) has been studied extensively from a theoretical viewpoint. ... 

Many examples of nucleophilic substitutions of the phosphonitrilic hahdes are known and the first physical-organic papers on the... 

In hydroxyUc solvents, the reaction with aniline follows a bi-molecular course but is complicated by competing solvolysis. This is a striking result when compared with the behavior of picryl chloride, which is much more selective with regard to the same reagents (aniline and alcohol), and has been interpreted to mean that bond-breaking has made appreciable progress in the rate-determining step of the reaction of phosphonitrilic chloride. Furthermore, the same indication is obtained from the fact that in the reactions of the halides, the fluorine chlorine ratios are less than one. ... 

Phosphonitrilic Metal polyphosphinates Phenylsilesesquioxanes (phenyl-T ladder polymers)... 

Allcock HR and Kugel RL. Synthesis of high polymericalkoxy and aryloxy phosphonitriles. J Am Chem Soc, 1965, 87, 4216 217. 

Allcock HR, Kugel RL, and Valan KJ. Phosphonitrilic compounds. Vll. High molecular weight poly (diaminophosphazenes). Inorg Chem, 1966, 5, 1716-1718. 

Finally, two more anionic phosphate anions with six oxygen substituents at phosphorus (Fig. 5) were isolated by serendipity. Compound 25 [43] was isolated from the reaction of naphthalene-2,3-diol and phosphonitrilic chloride in... 

Phosphonitrilic chloride PCI5+NH4CI atl50°C, or by heating cyclic trimer Cl — i>=N— 1 Rubberlike, crystallizes on stretching. Swells in benzene... 

Figure 1. Scheme showing the polymerization of the trimeric phosphonitrilic chloride to poly(dichlorophosphazene) and its subsequent substitution with the sodium salts of alcohols or phenols... 

Dillon, K. B. et al., J. Chem. Soc., Dalton Trans., 1980, 1037 This polymer of phosphonitrilic diazide is a viscous explosive oil. 

In addition to the types of structures shown thus far, there are several others that are both interesting and important. One such type of structure contains unsaturated rings. Because R-C=N is called a nitrile, compounds containing the -P=N group were originally called phosphonitriles. An unstable molecule having the formula N-PH2 is known as phosphazine. Although this molecule is unstable,... 

Linear phosphonitrilic chlorides (LPNCs), silicone fluids and, 22 573 Linear photodiode arrays, 19 153 Linear polyesters, 14 116 Linear polyethylene fibers, 20 398 Linear polyimides, synthesis of, 20 273 Linear polymers, 20 391 25 455 high molecular weight, 23 733 zero-shear viscosity of, 19 839 Linear poly(thioarylene)s, 23 705 Linear PPS, 23 704. See also... 

The Phosphonitrilic Halides and Their Derivatives N. L. Paddock and H. T. Searle... 

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