THE VAPOR PRESSURES OF PROPANE, PROPYLENE AND NORMAL BUTANE AT LOW TEMPERATURES.1
Journal of the American Chemical Society
Calc. for CTHION~OZ: 18.18%. Found: 18.17% total N. The ammonium salts of the three aminobenzoic acids can be prepared! in an ether solution by the general method described, modifying the method in the case of the m-salt by pouring the saturated alcoholic solution into. an excess of ether. The three salts are soluble in water, the alcohols, acetone and acetic acid. Ammonium 3,5-Diaminobenzoate.-After having so easily prepared the ammonium salts of the nitrobenzoic acids, the 3,s-dinitrobenzoic.
... 3,s-dinitrobenzoic. acid, and the aminobenzoic acids, an attempt was made to prepare the ammonium salt of 3,5-diaminobenzoic acid by passing dry ammonia into. a solution of the acid in different organic solvents. Saturated solutions of the acid in methyl alcohol, ethyl alcohol, ether, benzene and carbon tetrachloride were tried, but no precipitate formed, owing evidently to, the extreme solubility of the salt in these solvents. Further attempts will be made to prepare this salt and study its properties. This investigation is being continued with other organic acids, especially the substituted acids. In this paper, one of a series dealing with the vapor pressures of liquid a t low temperatures, are shown the vapor pressures of propane, propylene * THIS JOURNAL, 36, 1570 (1914).