284 XYLENES. 



nitric acid does not act upon it, chromic acid oxidizes 

 it to isophtalic acid. 



Monobrommetaxylene, C 6 H 3 5r(CH 3 ) 2 . Liquid 

 boiling at 204-205. Dibrommetaxylene, C 6 H 2 Br 2 

 (CH 3 ) 2 . Colorless, shining, crystalline laminae ; fusing 

 point, 72; boiling point, 256. Tetrabrommetaxylene, 

 C 6 Br 4 (CH 3 ) 2 . Long, fine needles, difficultly soluble in 

 alcohol. Fusing point, 241. 



Nitrometaxylene, C 8 H 9 (M) 2 ). Pale yellow liquid, 

 boiling at 237-239. Congeals at a low temperature, and 

 melts again at +2. Ttinitrometaxylene, C 8 H 8 (N0 2 ) 2 , 

 is easily produced by heating metaxylene with con- 

 centrated nitric acid. Colorless, needly crystals ; easily 

 soluble in hot alcohol; fusing point, 93. Trinitro- 

 metaxylene, C 8 H 7 (N0 2 ) 3 , is obtained by pouring meta- 

 xylene into a mixture of concentrated sulphuric acid 

 and concentrated nitric acid. Colorless needless, very 

 difficultly soluble in boiling alcohol; fusing point, 

 176. 



Amidometaxylene (Metaxylidin), C 8 H 9 (im 2 ). 

 Colorless liquid, boiling at 216. Yields salts that 

 crystallize well. Amidonitrometaxylene, C 8 H 8 (N"0 2 )NH 2 . 

 Reddish-yellow, monoclinate crystals, difficultly solu- 

 ble in hot water, easily soluble in alcohol; fusing point, 

 123. Weak, monatomic base. Dinitroamidometa- 

 xylene, C 8 H 7 (E"0 2 ) 2 KH 2 . Yellow crystals, very sparingly 

 soluble in water, easily soluble in alcohol. Fusing 

 point, 192. Hardly possesses basic properties. 

 Diamidometaxylene, C 8 H 8 (KH 2 ) 2 . Fine, colorless needles ; 

 easily soluble in hot water and in alcohol ; fusing 

 point, 152. Changes its color rapidly in contact with 

 the air. Strong, diatomic base. Nitrodiamidometa- 

 xylene, C 8 H 7 (N"0 2 )(KH 2 ). Large, red, shiny prisms; 

 almost insoluble in cold water, more easily soluble in 

 hot water and in alcohol ; fusing point, 213. Weak 

 base. 



