CHINOLINE AND ITS HOMOLOGUES. 383 





HoFMANN. 



GrERHARDT. 







Bromeis. 





Grev. Williams. 

 Mean. 



Calcul. 



















""^ 



Carbon, . 



32-06 





32-99 



32-46 



32-51 



33-31 



33-42 



33.33 



32-26 32-19 



Hydrogen, 



2-58 





3-14 



3-14 



3-28 



2-71 



2-83 



2-68 



2-76 2-39 



Nitrogen, 







4-42 







3-98 



4-21 



4-00 



4-17 



Chlorine, 



30-96 

















31-74 



Platinum, 



29-27 



29-11 



2780 



28-08 



27-69 



28-23 



28-34 



2881 



29-38 29-51 



100-00 



Only the first of these analyses was made from a base extracted from coal-tar ; 

 all the others were obtained from chinoline, produced by destructive distillation of 

 cinchonine with potash. 



Laurent, by mixing hot alcoholic solutions of hydrochlorate of chinoline and 

 bichloride of platinum, obtained, after twenty-four hours, fine yellow needles ; but, 

 on examination under the lens, it was found not to be a homogeneous crystalliza- 

 tion, for a small quantity of little grains had also deposited.* I have not found 

 that any observer, except myself, has subjected the bases produced from cincho- 

 nine to a systematic fractionation, before forming the platinum salt. The fraction 

 analysed by me had been rectified fourteen times, and was nearly constant be- 

 tween 460° and 470°. 



Aurochloride of Chinoline. — The only account of this beautiful salt I have 

 been able to find is in Dr Hofmann's paper, on the bases of coal-tar, where he 

 merely states, that it corresponds in colour and other properties with the gold 

 salt of aniline, but the latter appearsf to be a yellow precipitate which rapidly 

 becomes brown in the air, and, therefore, differs considerably from the chinoline 

 salt, which is quite permanent under the same circumstances. As obtained by 

 me from a specimen of chinoline of considerable purity, it was in the form of 

 slender canary-yellow needles, sparingly soluble in cold water, and precipitating 

 instantly on the addition of a solution of terchloride of gold, to a moderately strong 

 solution of hydrochlorate of chinoline. 



3-883 grains of aurochloride of chinoline dried at 212° gave, on ignition, 

 1-625 ... of gold. 



or, per cent. — 



Experiment. Theory. 



(C 18 H 7 N, HCl + AuCl 3 ) 



41-85 42-00 



Palladiochloride of Chinoline. — Dr Hofmann describes this salt in his paper, 

 previously quoted, as resembling that from aniline, but M. MuLLERt states the 

 latter to be yellow ; I found, however, that when moderately concentrated solu- 

 tions of chloride of palladium and hydrochlorate of chinoline are mixed, a copious 



* Gerhardt, loc. cit., and Laurent, Ann. de Chim. et de Phys. [3] xxx., 368. 



t Gerhardt, Traite, tome troisieme, p. 86. + Ann. derCh. u. Pharm. lxxxvi., 368. 



