Nitrogen pentoxide formation from

The paraffin chain shows high reactivity toward nitric anhydride [4]. The reaction of nitrogen pentoxide (N O ) with paraffins and cyclohexane occurs quickly even at 0 °C in a solution of CCl with the formation mainly of secondary alkyl nitrates and nitro compounds. This reaction is intensified by a very active NO3 radicals resulting from the homolytic dissociation ... 

G. Baume and M. Robert found that pure nitrogen trioxide can only exist at very low temp, in the solid state or in the liquid state under press, of nitric oxide. At temp, above —100°, it dissociates. It is not possible to distil it in a vacuum because of the immediate formation of an atmosphere of nitric oxide at temperatures at which distillation is possible. The blue liquid has no definite b.p., and by interpolation from the vap. press, curves between —80° and 35°, it is inferred that the b.p. is —27° at 760 mm. By prolonged drying over phosphorus pentoxide,... 

A number of hypoxanthine derivatives have resulted from rearrangement of 7-oxoimidazo-[4,5-rfl[l,3]oxazines with an amine hydrochloride in a mixture of Af,A -dimethylcyclohexylamine and phosphorus pentoxide in which the overall effect is the replacement of the ring oxygen by nitrogen, e.g. formation of 9. ... 

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