Aminocyclotetraphosphazenes and Transannular Bridged Bicyclic Phosphazenes

Phosphorus-31 NMR spectroscopy is the best method of checking identity and purity. The product, in CDCI3, shows a singlet at 104.1 ppm for the cis isomer and a 2 1 doublet triplet at 134.5 and 129.0 ppm, respectively, for the trans isomer, Jptip unresolved at room temperature.  

The most common impurities are EtjNsP4Cl2 and the oxides of (Et-NPC1)3. These are easily identified by P NMR spectroscopy and the oxides give signals well upheld of those noted here. The oxides may be removed by recrystallization from light petroleum (bp 40-60°). 

Aminoiysis reactions of l,3,5,7,2X ,4X ,6X. ,8kMetraazatetraphosphocine (octachlorocyclotetraphosphazene) (N4P4Clg) with primary amines, as well as the reactions of bis(primary amino) hexachloro derivatives, N4P4Cl6(NHR)2, with secondary amines proceed in three distinct pathways (a) a stepwise replacement of chlorine atoms to yield partially and fully substituted cyclotetraphosphazenes(tetraazatetraphosphocines), (b) inter- 

The syntheses of a few (amino)cyclotetraphosphazenes and transannular bridged bicyclic phosphazenes derived from them are described next. 

The colorless crystals of compound II melt at 116°. The compound can be stored in a desiccator for a few days, without any appreciable decompo- 

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Aminocyclotetraphosphazenes and Transannular Bridged Bicyclic Phosphazenes 17 Procedure... 

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