From the reaction of N3P3C16 with 1,3-dihydroxypropane two isomeric N3P3C12[O(CH2)30]2 derivatives were isolated, whose n.m.r. spectra suggest, and crystal structures prove, that they represent an example of dispirokpiro-ansa isomerism, the first of its kind in phosphazene chemistry.
X-Ray crystallographic and n.m.r. spectroscopic investigations show that the geminal amino derivative N3P3C14(NH2)2 on treatment with sodium n-propoxide in n-propanol gives the trans-compound, N3P3(NH2)2(OPrn)4, this being the first example of a rearrangement of this type in phosphazene chemistry.
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