224 DR T. ANDERSON ON THE PRODUCTS OF THE 



place, though more slowly, and it is necessary to have them in contact for some 

 days before the action is finished. When heat is applied, the action is complete 

 in ten minutes, but in every instance the tubes were allowed to stand for twenty- 

 four hours, so as to present the complete crystallization of the new compound. 

 The tubes were then opened, the whole contents thrown upon a filter, and the 

 crystals slightly washed with a mixture of alcohol and ether, pressed between 

 folds of filtering paper, and dissolved in the smallest possible quantity of a mixture 

 of boiling alcohol and ether. On cooling, the new substance is deposited in beauti- 

 ful silvery plates. It is highly soluble in water, and though not deliquescent, it 

 becomes slightly damp in moist air. Its aqueous solution, on evaporation, solidi- 

 fies into a mass of crystals. It is readily soluble in alcohol, especially when boil- 

 ing, and the hot solution on cooling becomes filled with crystals. It is less soluble 

 in ether. It fuses below 212^ into an oily fluid. Its analysis gave these results, 



{5*350 grains dried in vacuo, gave 

 7'570 ... of carbonic acid, and 

 2-375 ... water. 



f 6-440 grains, dried in vacuo, gave by direct precipitation 

 |6 - 065 ... iodide of silver. 



Experiment. 



Calculation. 





38-57 



38-70 C 16 



96 



4-93 



4-83 H 12 



12 



5-61 



5-67 N 



14 



50-89 



50-80 I 



126 



Carbon, 

 Hydrogen, 

 Nitrogen, 

 Iodine, 



100-00 100-00 248 



These results agree with the formula C 16 H u N HI, which is that of hydriodate of 

 ethylopicoline. 



On the addition of a few drops of caustic potash to the solution of this salt, 

 no odour of a volatile base evolved, nor is there any separation of an oily layer, 

 but the addition of a large quantity of strong potash, causes the precipitation of 

 a viscid oil, which solidifies on standing for some hours into a mass of crystals, 

 generally much coloured, and which proves to be the hydriodate partially altered 

 by decomposition. When boiled with strong potash, a volatile base is slowly 

 formed, which is a product of decomposition, and will be afterwards referred to. 

 From these characters it is obvious, that ethylopicoline belongs to the ammonium 

 class of bases, and hence, picoline itself, must be a nitryl base ; and this being 

 the case, the formula of the iodine compound might be written thus, C 16 II l2 N + I, 

 representing it as the iodide of a base corresponding to ammonium, of which the 

 constitution must be C ie H 12 N, and whose oxide, C 1G H 12 NO, must exist in its 

 oxygen acid salts. If we adopt the nomenclature proposed by Hoffman for the 

 ammonium bases, we should have a very clumsy name for this substance, and I 

 shall therefore continue to call it ethylopicoline, which, though not perfectly 

 correct, is sufficiently distinctive. 



