Nitrourethan, and ammonium salt

Nitrosylpentamminecobalt(III) chloride, pink, 4 168 [shown to be chloropentamminecobalt-(III) chloride], 6 185 Nitrosyls, nomenclature of, 2 264 Nitrosylsulfuric acid, 1 55 Nitrourethan, and ammonium salt, 1 69... 

N 36.83%, OB to C02 -42.1% colorless needles from ether nip 38° d 1.243 at 49/4° RI 1.4616 at 48,6°. V sol in cold w, ale, chlf and benz less sol in eth and still less sol in petr eth. Can be prepd by nitrating n-methyl-urethane with abs nitric acid. The resulting soln of methyl nitrourethane is drowned in w, neutralized with Na carbonate, and extrd with eth to remove methyl nitrourethane. On passing ammonia gas thru the eth extract, a white ppt of the ammonium salt of methylnitramine is deposited and sepd by filtration. It is disd in ale and boiled to drive off the ammonia, and... 

A mixture of 100 ml. of concentrated sulfuric acid and 300 g. of cracked ice is now added to the foregoing ammoni-acal solution the resultant solution must be acid to Congo red. It is extracted six times with 200-ml. portions of alcohol-free ether, and the combined ethereal extracts are dried over anhydrous calcium chloride. This operation further purifies the nitrourethane which is then again converted to the ammonium salt. 

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