1877.] 



Transformation of Leucoline into Aniline. 



67 



resinous mixture of acids separates. The crude acids may also be ob- 

 tained as potash salts by evaporating to dryness the product of the 

 reaction and extraction with alcohol. The aqueous solution of these 

 potash salts, on the addition of acetate of lead, yields a white insoluble 

 lead salt from which the acids may also be separated. 



The crude mixture of acids thus obtained, boiled with water for a con- 

 siderable time and filtered from an oily matter, yields, after treatment with 

 a little animal charcoal, crystals of a well-defined acid. 



Leucolinic Acid, C 9 H 9 N0 3 . — The crystalline substance obtained, as 

 above described is mainly composed of this acid, which may be obtained 

 in colourless plates or needles by a few crystallizations. The acid melts at 

 162° C, is slowly volatilized when heated to 110° C. in a current of hydrogen, 

 and communicates a characteristic aromatic odour to the vapour from a hot 

 aqueous solution. The acid may be most conveniently crystallized from an 

 aqueous solution, being slightly soluble in cold water. Although soluble 

 in alcohol and ether the acid is generally rendered slightly coloured, from 

 an apparent oxidation, when crystallized from these menstrua. 



The salts of this acid are for the most part soluble, the more notable 

 exceptions being the lead, mercurous, and ferric salts. The silver salt 

 crystallizes in fine needle-shaped crystals. 



Analyses of different specimens of the acid and silver salt yielded the 

 following results : — 



Acid. I. II. in. 



Weight of acid taken , 0*1625 0-3345 0*2315 



Carbonic anhydride produced. . 0*3620 0*7450 0*5110 

 Water 0*0790 0*1595 0*1060 



Calculated centesimally these figures give : — * 



I. II. III. O q H 9 NO s . 



Carbon 60*75 60*74 60*20 60*33 



Hydrogen.... 5*40 5*30 5*09 5*02 



Silver Salt. I. II. III. 



Weight of salt taken 0*5115 0*3206 0*4925 



Carbonic anhydride produced . . 0*7080 0*4390 0*6933 



Water produced 0*1300 0*0850 0*1276 



Silver 0*1868 



Calculated centesimally these figures give : — 



I. II. III. C 9 H 8 A g N0 3 . 



Carbon 37*73 37*34 38*39 37*76 



Hydrogen .... 2*82 2*94 2*88 2*79 



Silver 37*93 37*76 



A quantity of the silver salt, weighing 0*1274 gram, ignited, left 

 0*04815 gram of silver, corresponding to 37*79 per cent. 



Nitrogen Determination. — The nitrogen was found by Gottlieb's method 

 to bear to the carbonic anhydride produced the volume ratio of 1 to 18*4 

 and 1 to 18*8. 



f 2 



