10 PROCEEDINGS OF THE AMERICAN ACADEMY 



I. 0.2104 grm. of the substance gave on combustion 0.4262 grm. of 



carbonic dioxide and 0.0903 grm. of water. 

 II. 0.1886 grm. of the substance gave 16.9 c.c. of nitrogen at a tem- 

 perature of 22° and a pressure of 766.6 mm. 



Calculated for Found. 



C 6 H 2 (NHC G H 5 )(N'0,) 2 CH(C0 2 C 2 H 5 ) 2 . I. II. 



Carbon 54.68 55.24 



Hydrogen 4.56 4.77 



Nitrogen 10.07 10.24 





Properties. — The anilidodinitrophenylmalonic ester forms flattened 

 needles terminated by one or two planes, which form much more 

 oblique angles with the sides than those which appear in the bromdi- 

 nitrophenylmalonic ester. It is also found occasionally in star-shaped 

 groups of needles, has a bright yellow color, and melts at 118°. It is 

 only slightly soluble in cold alcohol, much more soluble in hot, but 

 not freely even in this. More soluble in methyl than in ethyl alcohol ; 

 soluble in ether, or in carbonic disulphide ; freely soluble in benzol, 

 glacial acetic acid, or acetone, very freely in chloroform ; essentially 

 insoluble in water or ligroine. The best solvent for it is alcohol. 

 Concentrated hydrochloric acid does not dissolve, or act on it in open 

 vessels, either hot or cold. An aqueous solution of sodic hydrate 

 acts on it in the cold only very slowly and imperfectly, but gives a 

 red solution when boiled with it., In alcoholic solution sodic hydrate 

 converts it into a red soluble salt ; the anilido compound therefore still 

 possesses acid properties, but these are much less marked than in the 

 corresponding bromine compound ; the negative influence of the 

 dinitrophenyl therefore has been partly neutralized by the introduc- 

 tion of the basic aniline radical C r H.NH. 



The Sodium Salt C 6 H 2 (C 6 H 5 NH)(NOJ 2 CNa(COOC 2 H 5 ) a . 



This substance was formed in the same way as the sodium salt of 

 the bromdinitrophenylmalonic ester ; that is, by treating an alcoholic 

 solution of the substance with alcoholic sodic hydrate not in excess, 

 evaporating to dryness with a little ether on the water-bath, and 

 extracting the excess of the ester with benzol. It was dried at 100°, 

 and analyzed. 



0.1180 grm. of substance gave 0.0194 grm. of sodic sulphate. 



Calculated for Found. 



C H 2 (C C H 3 N H X NO A,C \a( C0 2 C 2 H 5 ) 2 . 



lium 5.24 5.32 



