contained in Coal-gas Naphtha. 265 



Hydrochlorate of Leucol. — This salt is very seldom'obtained 

 in crystals. The mixture, when placed under the air-pump 

 receiver, became a thick syrup. When dry hydrochloric acid 

 gas is directed upon the surface of an ethereal solution of 

 leucol, the compound separates in globules, which subside in 

 the form of a tenacious stratum, and after a very long time 

 small crystals appear. 



Chloride of Platinum and Leucol. — This compound preci- 

 pitates of an orange-yellow colour (rather lighter than the 

 analogous cyanol compound), when a solution of hydrochlo- 

 rate of leucol is mixed with chloride of platinum. It is spa- 

 ringly soluble in water and hydrochloric acid, less so in alco- 

 hol and aether. A mixture of the two serves very well for 

 washing the salt. The chloride of platinum and leucol is de- 

 posited as a warty crystalline mass by spontaneous evaporation 

 from an aqueous or hydrochloric solution. 



Analysis of this salt: — 1*0528 grm. of chloride of platinum 

 and leucol gave 1-2377 grm. of carbonic acid, and 0*2445 grm, 

 of water. 



0*892 grm. of chloride of platinum and leucol gave 1*120 

 grm. of chloride of silver. 



The determination of platinum has been already mentioned. 

 The above results agree with the formula CI H, C 18 H 8 N 



+ Cl 9 Pt. 



Composition in per cents. 



4216-21 100-000 



Chloride of Mercury and Leucol is a white crystalline preci- 

 pitate, produced by treating an alcoholic solution of leucol 

 with chloride of mercury. For the preparation of this salt 

 too small a quantity of the spirit must not be employed, be- 

 cause in such a case the compound is deposited as an unc- 

 tuous mass upon the sides of the vessel. This salt is analo- 

 gous to the corresponding one of cyanol ; with this exception 

 it is not decomposed by boiling water. 



Analysis of this salt dried in the air: — 1-2503 grm. of chlo- 

 ride of mercury and leucol gave 1*2045 grm. of carbonic acid. 



6259 grm. of chloride of mercury and leucol gave 0-446 

 grm. of chloride of silver. 



1-0875 grm. of chloride of mercury and cyanol gave 05427 

 grm. of mercury. 



