CHINOLINE AND ITS HOMOLOGUES. 



391 



mass of crystals. When this is the case, and the tube cools, the end may be cut 

 off, a tube bent twice at right angles attached by means of a cork, and, the pressure- 

 tube being immersed in the water-bath, the excess of iodide of ethyl distilled 

 over. The crystals are then dissolved out in a small quantity of hot alcohol, and 

 the solution allowed to cool. The first crop is of a rich yellow colour, becoming 

 of a pale lemon tint on recrystallization. In the state in which the salt is thus 

 obtained it possesses the property of becoming a deep blood-red at 21 2°, and regain- 

 ing its normal tint on cooling ; this peculiarity becomes much lessened by a re- 

 petition of the process. The crystals appear to be cubic, and are easily obtained 

 of considerable size. They dissolve more readily in water than alcohol, but the 

 latter is the best solvent for the purposes of crystallization. 



{6-336 grains of hydriodate of ethyl-chinoline, dried at 212°, gave 

 10-810 ... carbonic acid, and 

 2-513 ... water. 



TT r 6-684 

 li - { 5-457 



hydriodate of ethyl- c 

 iodide of silver. 



Experiment. 

 I. II. 



. 46-53 

 4-41 



44-12 



,hinoline, dr 



Led at 212°, gave 



Calculation. 



Carbon, 

 Hydrogen, 



Nitrogen, 

 Iodine 



46-32 

 4-21 

 4-91 



44-56 



C 22 132 

 H 12 12 

 N 14 

 I 127 



100-00 



285 



Platinum Salt of Ethyl-Chinoline. — After adding nitrate of silver to a solution 

 of hydriodate of ethyl-chinoline, as in making the iodine determination last men- 

 tioned, the excess of silver was removed by the addition of hydrochloric acid, the 

 liquid filtered, and evaporated to a moderate bulk, on the addition of bichloride of 

 platinum, a rich golden-yellow precipitate of sparing solubility was obtained ; it 

 was first washed with a little water, and afterwards with alcohol. 



{6-813 grains of platinochloride of ethyl-chinoline gave 

 1-847 ... platinum. 



Agreeing with the formula 





C 22 H n N, H CI + 



Pt Cl 3 . 









Experiment. 





Calculation. 





Carbon, 



36-31 



C 22 



132 



Hydrogen, 

 Nitrogen, . 

 Chlorine, . 



. 



3-30 



3-85 



29-30 



H 12 



N 



C1 3 



12 



14 



106-5 



Platinum, . 



27-11 



27-24 



Pt 



99 



100-00 



363-5 



