PSEUDOCUMENE. 287 



Nitromesitylene, C 9 H n (N0 2 ). Almost colorless 

 prisms; fusing point, 41; distillable without decom- 

 position ; easily soluble in alcohol. Dinitromesitylene, 

 C 9 H 10 (N"0 2 ) 2 . Fine, colorless needles, of a bright lus- 

 tre; fusing point, 86- Trinitromesitylene, C 9 H 9 (N0 2 ) 3 . 

 Needles that fuse at 232, and are very difficultly 

 soluble in alcohol. 



Amidomesitylene, C 9 H n .NH 2 . Colorless liquid; 

 does not congeal at 0. Nitroamidomesitylene, C 9 H 10 

 (N0 2 ).KH 2 . Long, yellow needles ; fusing point, 100. 

 Dinitroamidomesitylene, C 9 H 9 (N0 2 ).KH 2 . Short, yellow 

 prisms; fusing point, 193-194. Diamidomesitylene, 

 C 9 H 10 (NH 2 ) 2 . Long, colorless needles ; fusing point, 

 90. Nitrodiamidomesitylene, C 9 II 9 .N0 2 (KH) 2 . Large, 

 red, monoclinate crystals ; fusing point, 184. 



2. Pseudocumene (1:3: 4). Is produced by the 

 decomposition of a mixture of brompara- or brom- 

 metaxylene and methyl iodide with sodium. Color- 

 less liquid ; boiling point, 166. When oxidized with 

 nitric acid, it is converted into xylylic and xylidinic 

 acids. 



Monobrompseudocumene, C 9 H n Br = C 6 H 2 Br 



(CH 3 ) 3 . Colorless laminse ; easily soluble in hot alco- 

 hol, but slightly soluble in cold alcohol ; fusing point, 

 73. Tribrompseudocumene, C 6 Br 3 (CII 3 ) 3 . Fine, color- 

 less needles, very difficultly soluble in alcohol; fusing 

 point, 224. 



Nitropseudocumene, C 9 H n (N0 2 ). Long needles; 

 easily soluble in hot alcohol ; fusing point, 71 ; boil- 

 ing point, 265. Trinitropseudocumene, C 9 H 9 (N0 2 ) 3 . 

 Colorless, quadratic prisms ; fusing point, 185. 



Amidopseudocumene, C 9 H n .lSrH 2 . Colorless nee- 

 dles, of a silky lustre; sparingly soluble in water, 

 easily soluble in alcohol; fusing point, 62. Nitro- 



