Nitrogen continued

XXI XXI, 1st 1935 3103-3241 One Cyclic Nitrogen (continued). Hydroxy compounds Atropine, 27. 

XXIV XXIV, 1st 1936 3555-3633 Two Cyclic Nitrogens (continued). j Carbonyl compounds Antipyrin, 27. 

A 1-1. three-necked flask equipped with a reflux condenser, an inlet for dry nitrogen, and a mechanical stirrer is flushed with dry nitrogen. It is then charged with 340 g. (4.00 moles) of piperidine (Note 1), 4.4 g. (0.19 g. atom) of sodium, and 5.0 g. (5.1 ml., 0.063 mole) of pyridine (Note 2). While a slow stream of nitrogen continues to pass through the flask, the solution is heated under reflux with high-speed stirring for approximately 10 minutes. 

Examples of cyclophosphazenes with ring systems containing elements other than phosphorus or nitrogen continue to be reported. The linear phosphazene [Ph2(H2N)Pi N.i P(NH2)Ph2]+Cl is cyclized by antimony pentachloride to give the compound (35). This result contrasts with... 

TABI.K 1.1 Physical Properties of Nitrogen (continued) Property Value... 

With USHY at low coke content Vr/Va tor n-hexane is equal to 0.5 and Vr/Va for nitrogen to 1. Nitrogen continues therefore to accede to all the pore volume not occupied by coke while coke molecules block the access of n-hexane to twice the volume they occupy. As the volume of the first molecules trapped in the supercages is equal to about 1/4 of the supercage volume n-hexane continues to accede to part... 

Phenylhydrazine as a reducing agent. Walther, at Dresden in 1895-96, ° observed by chance that phenylhydrazine reacts energetically with azobenzene at an elevated temperature. He heated a mixture of 0.1 mole of each reactant in abathat 125-130° and noted that evolution of nitrogen continued for about 1 hr. and then ceased. Crystallization of the residual material from an equal volume of absolute ethanol afforded white plates of pure hydrazobenzene in nearly quantitative yield. Nitrogen evolved amounted to 2.7 g. the amount expected for the following reaction is 2.8 g. ... 

Now the tube furnace is heated to 425-45O0C, while the slow stream of nitrogen continues through the tube. The heat turns the thorium carbonate into thorium oxide. The heating continues for 12 hours, after which the... 

Close the valve between vacuum system and the filling apparatus. Open the valve of the sample container, and cool the lower tip of the cell container with liquid nitrogen. Continue until approximately 1 ml of cyclooctane has sublimated into the tip. Close the connecting valve. 

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