( 47 ) 



nearly black compound m. p. 43°, which in an open vessel is com- 

 pletely decomposed in a few days. 



Analysis: Found 55.077„ C\II,(NO,),. 



Theory for 1 mol. 0«H,(NO,), + 1 mol. C,HyN(CH,), 55.47». 



With «-naphthylamine in alcoholic solution m. dinitrobenzene forms 

 a compound crystallising in red needles m. p. 67°. Nitrogen deter- 

 mination: Found l3.477o- Calculated for equal molecules 13.57o- 



Dimethyl-/?-naphtylamine in alcoholic solution also gives dark red 

 needles of a compound consisting of equal mols. of the components 

 and melting at 52°— 53°. 



Nitrogen determination: Found: 12.627„ N. Calculated: 12.397„. 



Tetramethylmetaphenylenediamine ^) forms with m. dinitrobenzene 

 — but less readily so in alcoholic solution — a very dark garnet 

 red compound melting at 58°. 



Analysis: Found 50.1 7„ C«H,(NO,),. Calculated for 



1 mol. C,H,(N0J, + 1 mol. C«H,N,(CH3), 50.67„. 



With benzidine metadinitrobenzene gives black crystals, which are 

 fairly stable, but are decomposed by hydrochloric acid. The melting 

 point is 128°. 



Analysis: Found 47.67o CgH,(N02)2. Calculated for equal molecules 

 47.737o. 



With tetramethylbenzidine in alcoholic solution only a small quantity 

 of a dark coloured compound is obtained ; the bulk of the components 

 crystallise separately. 



On the other hand 4.4'. tetramethyldiaminodiphenylmethane") gives 

 a fine garnet red compound crystallising in plates or compact crystals 

 m. p. 76° and containing 2 mols. of the amine for 1 mol. of dini- 

 trobenzene. 



Analysis: Found 25.27„, 257„ C,H,(N0J,. Calculated 24.857„. 



4.4'. Tetramethyldiaminobenzophenone in alcoholic solution gives 

 very beautiful, clear red plates m. p. 91°. In this compound, however 

 tivo mols. of diniti'obenzene are present for 1 mol. of the base. 



Analysis: Found 55.47^ C,H,(NO,),. Calculated 55.67„. 



With many other liquid aromatic amines m. dinitrobenzene gives 

 strongly coloured solutions; with numerous solid amines, in alcoholic 

 solution, a more or less powerful coloration is obtained also. Very 

 probably, it will appear possible to isolate a number of these additive 

 products in the solid condition. 



Utrecht. Org. Chem. Lab. University. 



1) R. 7, 3 (1888;. 



2) R. 7, 228 (1888). 



