212 



PROFESSOR T. ANDERSON ON THE PRODUCTS OF THE 



II. 



0-3997 gramme ethyl-iodide gave 

 0-5195 ... carbonic acid, and 

 01530 ... water. 



- 3512 gramme gave 



0-3513 ... iodide of silver. 



Carbon, 

 Hydrogen, 

 Nitrogen, 

 Iodine, 



Experiment. 



Calculation. 





35-44 



3574 C u 



168 



4-25 



426 H 20 



20 





5-96 N 2 



28 



54-05 



54-04 I 2 



254 



100-00 



470 



Corresponding with the formula C 10 H 20 N 2 (C 2 H.I) 2 . Heated with silver chloride 

 and water this salt was converted into the chloride, which, on the addition of 

 platinic-chloride gave the platino-chloride in very sparingly soluble small red 

 needles. 



f 0-2780 gramme platino-chloride gave 

 { 0685 ... platinum. 



This corresponds with 31-12 per cent., and the formula C 10 H 10 N 2 (C 2 H 5 Cl) 2 PtCl, 

 requires 30-44. 



The base itself, when separated from the iodide by silver oxide, forms a highly 

 alkaline solution, having generally a red or purple colour, which, on evaporation, 

 leaves a dark-coloured uncrystallised residue. It obviously belongs to the class 

 of ammonium bases, but I have not pursued its investigation further. 



Dibromo-Dipyridine. — This base is thrown down when bromine is added to a 

 solution of dipyridine hydrochlorate, or hydrobromate, as a white powder, insoluble 

 in water, sparingly soluble in cold, more so in hot alcohol, from which it is depo- 

 sited in flattened needles on cooling. If too much bromine has been used in its 

 preparation, these crystals are pink. Its basic properties are extremely feeble, 

 and it is a somewhat unstable compound ; for, on boiling with water, or with 

 hydrochloric acid, the original base appears to be more or less completely rege- 

 nerated. An analysis, in which the hydrogen was lost, gave 



j ( 0-3560 gramme dibromo-dipyridine gave 

 \ 04902 ... carbonic acid. 



"•I 



0-3420 gramme gave 

 04078 



Carbon, 



Hydrogen, 



Nitrogen, 



Bromine, 



perimer 



silver iodide. 

 t. 



Calculation. 





37-56 



37-97 



Pi. 



120 





2-53 



H 8 



8 



» • • 



8-87 



N 2 



28 



50-74 



50-87 



Br 2 



160 



100-00 



316 



