1871.] 



History of the Opium Alkaloids. 



13 



are obtained containing more C and H, and less I, than the original sub- 

 stance. By repeating this treatment several times successively, the same 

 ultimate compound appears to be produced in each case, being apparently 

 formed by the reactions 



C 68 H 86 1 2 N 4 12 , 4HI=2HI + 2H 2 0+C 68 H 8 

 C 68 H 82 LN 4 O 10 ,4HI = 2HI +C 69 H 8( 



,N 4 O 10 , 4HI, 

 N 4 O 10 , 4HI. 



The removal of the last traces of basic HI is very difficult ; it may be 

 accelerated by adding a few drops of sodium carbonate to the boiling solu- 

 tion and filtering hot from the small amount of precipitated base ; the 

 product is apt, however, to be more strongly yellow-coloured when ob- 

 tained in this way than when got by treatment with water alone. 



Specimen A. Got from compound C 68 H 82 1 2 N 4 O 10 , 4HI by water and a 

 little sodium carbonate : — 



0*366 grm. gave 0*672 C0 2 and 0*177 H 2 0. 

 0*406 grm. gave 0*227 Agl. 



Specimen B. From same compound by water alone : — 

 0*369 grm. gave 0*674 C0 2 and 0*174 H 2 0. 

 0*4555 grm. gave 0*2675 Agl. 



Specimen C. From compound C 68 H, 



0*4265 grm. gave 0*762 C0 2 and 0-220 H 2 O 

 0*3845 grm. gave 0-2275 Agl. 



Calculated. 



I 2 N 4 12 , 4HI by water alone 



Found. 



B. 



C. 



Mean. 





816 



50*25 



50*08 



49*81 



48*73 



49-54 





.. 84 



5*17 



5*36 



5*24 



5-73 



5-41 



N 4 



.. 56 



3*45 











o w 



. . 160 



9*85 











h 



. 508 



31*28 



30*21 



31*74 



31-98 



31-31 



C 68 H 80 N 4 O 10 ,4HI 



1624 



100*00 











Specimen A, dissolved in hot water and precipitated by sodium carbo- 

 nate, yielded a yellowish-white substance, rapidly becoming darker and 

 finally almost black. Dried rapidly at 100°, — 



0-370 grm. gave 0*930 CO and 0*235 H 2 0. 



About 0*5 grm. examined qualitatively for iodine gave only traces of 

 Agl. 



Calculated. 



H 80 



1S 



816 

 80 

 56 



240 



68*46 

 6*71 

 4-70 



20*13 



Found. 



68-55 

 7*05 



N 4 O, 



1192 100 00 



