260 BENZENE. 



Mpnobromanilin, C 6 H 4 Br.NH 2 . There are three 

 modifications known, which are obtained from the 

 three nitrobrombenzenes. One of these (orthobrom- 

 anilin) forms octahedrons, that fuse at 63-64; another 

 is liquid; and the third crystallizes in needles, which 

 fuse at 3I.Dibromanttin CWBrMSTH 2 . Flat needles. 

 Fusing point, 79.5. Tribromanilin C 6 H 2 Br 3 .KH 2 . 

 Long, colorless needles. Fusing point, 117 ; boiling 

 point, 300. 



Orthoiodanilin, C 6 H 4 I.NH 2 . Colorless needles, 

 which fuse at 60. The hydriodate is produced when 

 anilin is mixed with powdered iodine. lodanilin 

 hydrochlorate C 6 H 4 I(NH 2 ).HC1, prepared from this with 

 hydrochloric acid, crystallizes in laminae, which are 

 difficultly soluble in water, and still more difficultly in 

 hydrochloric acid. A second iodanilin, prepared from 

 the nitroiodobenzene of fusing point 34, forms 

 laminse of a silvery lustre. Fusing point, 25. 



Orthonitranilin, > C 6 H 4 (N0 2 )N"H 2 . Cannot be prepared 

 directly from anilin. Is produced by boiling nitra- 

 cetanilide and other anilides with caustic potassa. 

 Yellow needles or plates. In water very difficultly, in 

 alcohol easily soluble. Fusing point, 141. Sublim- 

 able. "Weak base. Metanitranilin is formed by the 

 action of alcoholic ammonia. on metabromnitroben- 

 zene . Dark, yellow, long, fine needles ; fusing point, 

 66. Weak base. Paranitranilin is formed by con- 

 ducting sulphuretted hydrogen into a warm alcoholic 

 solution of paradinitrobenzene, to which has been 

 added ammonia. Long, yellow needles, which fuse at 

 108. Easily sublimable. But slightly soluble in 

 water, but more readily than the preceding compound ; 

 in alcohol easily soluble. Weak base. The hydro- 

 chlorate is decomposed even by water. 



Dinitranilin, C 6 H 8 (N0 2 ) 2 .H 2 . By heating dinitro- 

 chlorbenzene with alcoholic ammonia. Bright-yellow 

 prisms. Fusing point, 175. Trinitranilin C 6 H 2 (]N~0 2 ) 3 . 

 From trinitrochlorbenzene with aqueous or alco- 



